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| TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 2 mhz / 3 mhz ultra small step down converter in 1x1.5 son package 1 features description ? 2 mhz / 3 mhz switch frequency ? up to 94% efficiency the tps6223x device family is a high frequency synchronous step down dc-dc converter optimized ? output peak current up to 500ma for battery powered portable applications. it supports ? excellent ac and transient load regulation up to 500ma output current and allows the use of tiny ? high psrr (up to 90db) and low cost chip inductors and capacitors. ? small external output filter components 1 m h/ with a wide input voltage range of 2.05v to 6v the 4.7 m f device supports applications powered by li-ion batteries with extended voltage range. the minimum ? v in range from 2.05v to 6v input voltage of 2.05v allows as well the operation ? optimized power save mode for low output from li-primary or two alkaline batteries. different ripple voltage fixed output voltage versions are available from 1.0v ? forced pwm mode operation to 3.3v. ? typ. 22 m a quiescent current the tps6223x series features switch frequency up ? 100% duty cycle for lowest dropout to 3.8mhz. at medium to heavy loads, the converter operates in pwm mode and automatically enters ? small 1 1.5 0.6mm 3 son package power save mode operation at light load currents to ? 12 mm 2 minimum solution size maintain high efficiency over the entire load current ? supports 0.6 mm maximum solution height range. ? soft start with typ. 100 m s start up time because of its excellent psrr and ac load regulation performance, the device is also suitable to applications replace linear regulators to obtain better power ? ldo replacement conversion efficiency. ? portable audio, portable media the power save mode in tps6223x reduces the ? cell phones quiescent current consumption down to 22 m a during light load operation. it is optimized to achieve very ? low power wireless low output voltage ripple even with small external ? low power dsp core supply component and features excellent ac load regulation. ? digital cameras for very noise sensitive applications, the device can be forced to pwm mode operation over the entire load range by pulling the mode pin high. in the shutdown mode, the current consumption is reduced to less than 1 m a. the tps6223x is available in a 1 1.5mm 2 6 pin son package. 1 please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. unless otherwise noted this document contains copyright ? 2009 ? 2010, texas instruments incorporated production data information current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters. v in gnd v out c 1 c2 l1 total area 12mm2 1.8 v v out 2.05 v - 6 v v in 2.2 f m c in l 1/2.2 h m c 4.7 f out m tps62231 vinen mode sw fb gnd
TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com these devices have limited built-in esd protection. the leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the mos gates. ordering information package package frequency t a part number (1) output voltage (2) ordering [mhz] designator marking TPS62230 2.5 v 3 dry TPS62230dry gv tps62231 1.8 v 3 dry tps62231dry gw tps62232 1.2 v 3 dry tps62232dry gx tps62239 1.0 v 3 dry tps62239dry op tps622311 1.1v 2 dry tps622311dry pa tps62235 1.2v 2 dry tps62235dry oq tps622313 1.3 v 3 dry tps62213dry qg tps622314 1.5 v 3 dry tps622314dry qf ? 40 c to 85 c tps62236 1.85v 2 dry tps62236dry or tps622312 2.0 v 3 dry tps622312dry qe tps62234 2.1 v 3 dry tps62234dry oh tps62238 2.25 v 3 dry tps62238dry on tps622310 2.3 v 3 dry tps622310dry ot tps6223-2.7 (3) 2.7 v 3 dry tps6223-2.9 (3) 2.9 v 3 dry tps62233 3.0 v 3 dry tps62233dry og tps62237 3.3v 2 dry tps62237dry os (1) the dry package is available in tape on reel. add r suffix to order quantities of 3000 parts per reel, t suffix for 250 parts per reel. (2) contact ti for other fixed output voltage options (3) device status is product preview, contact ti for more details absolute maximum ratings over operating free-air temperature range (unless otherwise noted) (1) value unit voltage at vin and sw pin (2) ? 0.3 to 7 v v i voltage at en, mode pin (2) ? 0.3 to v in +0.3, 7 v voltage at fb pin (2) ? 0.3 to 3.6 v peak output current internally limited a hbm human body model 2 kv esd rating (3) cdm charge device model 1 machine model 200 v power dissipation internally limited t j maximum operating junction temperature ? 40 to 125 c t stg storage temperature range ? 65 to 150 c (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. exposure to absolute ? maximum ? rated conditions for extended periods may affect device reliability. (2) all voltage values are with respect to network ground terminal. (3) the human body model is a 100-pf capacitor discharged through a 1.5-k ? resistor into each pin. the machine model is a 200-pf capacitor discharged directly into each pin. 2 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 dissipation ratings (1) power rating derating factor package r q ja for t a 25 c above t a = 25 c 1 1.5 son 234 c/w (2) 420 mw 4.2 mw/ c (1) maximum power dissipation is a function of t j(max) , q ja and t a . the maximum allowable power dissipation at any allowable ambient temperature is p d = [t j(max) ? t a ] / q ja . (2) this thermal data is measured with high-k board (4 layers board according to jesd51-7 jedec standard). recommended operating conditions operating ambient temperature t a = ? 40 to 85 c (unless otherwise noted) (1) min nom max unit supply voltage v in (2) 2.05 6 v effective inductance 2.2 m h effective capacitance 2.0 4.7 m f v out v in -1 v (3) 500 ma maximum i out (4) 3.0 3.6 recommended minimum 350ma maximum i out (5) 2.5 2.7 v supply voltage v out 1.8v 60 ma maximum output current (5) 2.05 operating virtual junction temperature range, t j ? 40 125 c (1) in applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated. maximum ambient temperature (t a(max) ) is dependent on the maximum operating junction temperature (t j(max) ), the maximum power dissipation of the device in the application (p d(max) ), and the junction-to-ambient thermal resistance of the part/package in the application ( q ja ), as given by the following equation: t a(max) = t j(max) ? ( q ja p d(max) ). (2) the minimum required supply voltage for startup is 2.05 v. the part is functional down to the falling uvl (under voltage lockout) threshold. (3) for a voltage difference between minimum v in and v out of 1 v (4) typical value applies for t a = 25 c, maximum value applies for t a = 70 c with t j 125 c, pcb layout needs to support proper thermal performance. (5) typical value applies for t a = 25 c, maximum value applies for t a = 85 c with t j 125 c, pcb layout needs to support proper thermal performance. copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 3 TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com electrical characteristics v in = 3.6v, v out = 1.8v, en = v in , mode = gnd, t a = ? 40 c to 85 c (1) typical values are at t a = 25 c (unless otherwise noted), c in = 2.2 m f, l = 2.2 m h, c out = 4.7 m f, see parameter measurement information parameter test conditions min typ max unit supply v in input voltage range (2) 2.05 6 v i out = 0ma. pfm mode enabled (mode = 0) 22 40 m a device not switching i out = 0ma. pfm mode enabled (mode = 0) 25 m a i q operating quiescent current device switching, v in = 3.6v, v out = 1.2v i out = 0 ma. switching with no load (mode/data = v in ), pwm operation, 3 ma v out = 1.8v, l = 2.2 m h i sd shutdown current en = gnd (3) 0.1 1 m a falling 1.8 1.9 v uvlo undervoltage lockout threshold rising 1.9 2.05 v enable, mode threshold v ih th threshold for detecting high en, mode 2.05 v v in 6v , rising edge 0.8 1 v v il th hys threshold for detecting low en, mode 2.05 v v in 6v , falling edge 0.4 0.6 v i in input bias current, en, mode en, mode = gnd or v in = 3.6v 0.01 0.5 m a power switch high side mosfet on-resistance 600 850 r ds(on) v in = 3.6v, t jmax = 85 c; r ds(on) max value m ? low side mosfet on-resistance 350 480 forward current limit mosfet 690 850 1050 ma high-side i limf v in = 3.6v, open loop forward current limit mosfet low side 550 840 1220 ma t sd thermal shutdown increasing junction temperature 150 c thermal shutdown hysteresis decreasing junction temperature 20 c controller t onmin minimum on time v in 3.6v, v out = 1.8v, mode = high, i out = 0 ma 135 ns t offmin minimum off time 40 ns output v ref internal reference voltage 0.70 v v in = 3.6v, mode = gnd, device operating in pfm 0% mode, i out = 0ma output voltage accuracy (4) v in = 3.6v, mode = v in , t a = 25 c ? 2.0% 2.0% v out i out = 0 ma t a = ? 40 c to 85 c ? 2.5% 2.5% dc output voltage load regulation pwm operation, mode = v in = 3.6v, v out = 1.8 v 0.001 %/ma dc output voltage line regulation i out = 0 ma, mode = v in , 2.05v v in 6v 0 %/v time from active en to v out = 1.8v, v in = 3.6v, t start start-up time 100 m s 10 ? load i lk_sw leakage current into sw pin v in = v out = v sw = 3.6 v, en = gnd (5) 0.1 0.5 m a (1) in applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated. maximum ambient temperature (t a(max) ) is dependent on the maximum operating junction temperature (t j(max) ), the maximum power dissipation of the device in the application (pd(max)), and the junction-to-ambient thermal resistance of the part/package in the application ( q ja ), as given by the following equation: t a(max) = t j(max) ? ( q ja p d(max) ). (2) the minimum required supply voltage for startup is 2.05v. the part is functional down to the falling uvl (under voltage lockout) threshold (3) shutdown current into vin pin, includes internal leakage (4) v in = v o + 1.0 v (5) the internal resistor divider network is disconnected from fb pin. 4 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 pin functions pin i/o description name no vin 3 pwr v in power supply pin. gnd 4 pwr gnd supply pin en 5 in this is the enable pin of the device. pulling this pin to low forces the device into shutdown mode. pulling this pin to high enables the device. this pin must be terminated. sw 2 out this is the switch pin and is connected to the internal mosfet switches. connect the inductor to this terminal fb 6 in feedback pin for the internal regulation loop. connect this pin directly to the output capacitor. mode 1 in mode pin = high forces the device to operate in pwm mode. mode = low enables the power save mode with automatic transition from pfm (pulse frequency mode) to pwm (pulse width modulation) mode. functional block diagram copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 5 gate driver anti shoot-through currentlimit comparator sw softstart bandgap undervoltage lockout limithigh side limitlow side fb en mode vingnd min. on time min. off time vin en integrated feed back network vref fb errorcomparator zero/negativecurrent limit comparator control logic pmosnmos mode thermal shutdown vref0.70 v 1 2 3 6 5 4 mode sw vin fben gnd dry package (top view) TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com parameter measurement information typical characteristics table of graphs figure h efficiency vs load current 1, 2, 3, 4, 5, 6, 7 h efficiency vs output current 8, 9, 10, 11 12, 13, 14, 15, v o output voltage vs output current 16, 17 18, 19, 20, 21, switching frequency vs output current 22, 23, 24, 25, 26, 27 i q quiescent current vs ambient temperature 28 i sd shutdown current vs ambient temperature 29 pmos static drain-source on-state resistance vs supply voltage and ambient temperature 30 r ds(on) nmos static drain-source on-state resistance vs supply voltage and ambient temperature 31 psrr power supply rejection ratio vs frequency 32 typical operation 33, 34, 35 pfm 36 line transient response pwm 37 mode transition pfm / forced pwm 38 ac - load regulation performance 39, 40, 41 load transient response 42, 43, 44, 45 start-up 46, 47 spurious output noise, 12r load 48 spurious output noise, 100r load 49 6 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated vin gnd fb mode en sw l = 1/2.2 h m tps6223x v = 2.05 v to 6 v in c 2.2 f in m v out c 4.7 f out m c : murata grm155r60j225me15d 2.2 f 0402 size in m c : murata grm188r60j475me 4.7 f 0603 size, vout >= 1.8 v c : taiyo yuden amk105bj475mv 4.7 f 0402 size, vout = 1.2 v l: murata lqm2hpn1r0mj0 1 h, lqm2hpn2r2mj0 2.2 h, size 2.5x2.0x1.2mm out out m m m m 3 TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 1. efficiency pfm/pwm mode 2.5v output voltage figure 2. efficiency forced pwm mode 2.5v output voltage figure 3. efficiency pfm/pwm mode 1.8v output voltage figure 4. efficiency forced pwm mode 1.8v output voltage copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 7 0 10 20 30 40 50 60 70 80 90 100 efficiency -% 0.1 1 10 100 1000 i - output current - ma o v = 5 v in v = 2.7 v in v = 3.6 v in v = 4.2 v in mode = gnd, v = 1.8 v, l = 2.2 h (mipsa25202r2), c = 4.7 f out out m m v = 3.3 v in v = 2.3 v in 0 10 20 30 40 50 60 70 80 90 100 efficiency -% 1 10 100 1000 i - output current - ma o v = 5 v in v = 2.9 v in v = 3.6 v in mode = v , v = 2.5 v, l = 2.2 h (lqm2hpn2r2mj0) c = 4.7 f in out out m m v = 4.2 v in 0.1 1 10 100 1000 i - output current - ma o 0 10 20 30 40 50 60 70 80 90 100 efficiency -% mode = gnd, v = 2.5v, l = 2.2 h (lqm2hpn2r2mj0) c = 4.7 f out out m m v = 5 v in v = 2.9 v in v = 3.6 v in v = 4.2 v in 0 10 20 30 40 50 60 70 80 90 100 efficiency -% 1 10 100 1000 i - output current - ma o mode = v , v = 1.8 v, l = 2.2 h (mipsa25202r2), c = 4.7 f in out out m m v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in v = 3.3 v in TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com typical characteristics (continued) figure 5. efficiency pfm/pwm mode 1.2v output voltage figure 6. efficiency forced pwm mode 1.2v output voltage figure 7. comparison efficiency vs inductor value and size figure 8. comparison efficiency vs i out ? tps62233 8 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated 50 55 60 65 70 75 80 85 90 efficiency -% 0.1 1 10 100 1000 i - output current - ma o lqm21pn2r2 l = 2.2 h 0805 (2x1.25x0.55mm ) m 3 mipsz2012d2r2 l = 2.2 h 0805 (2x1.25x1mm ) m 3 mipsd1r0 l = 1 h 0805 (2x1.25x1mm ) m 3 lqm2hpn1r0mj0 l = 1 h (2.5x2x1.2mm ) m 3 mode = gnd, c = 2.2 f (0402), c = 4.7 f (0402), v = 1.8 v, v = 3.6 v in out out in m m mipsa25202r2 l = 2.2 h (2.5x2x1.2mm ) m 3 0 10 20 30 40 50 60 70 80 90 100 efficiency -% 0.1 1 10 100 1000 i - output current - ma o mode = gnd, v = 1.2 v, l = 2.2 h mipsz2012 2r2 (2012 size), c = 4.7 f out out m m v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in 0.1 1 10 100 1000 i - output current - ma o 0 10 20 30 40 50 60 70 80 90 100 efficiency - % v = 3.6 v in v = 4.2 v in v = 5 v in tps62233mode = gnd, v = 3 v, l = 1 h, c = 4.7 f out out m m 0 10 20 30 40 50 60 70 80 90 100 efficiency -% 1 10 100 1000 i - output current - ma o mode = v , v = 1.2 v, l = 2.2 h mipsz2012 2r2 (2012 size), c = 4.7 f in out out m m v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 9. comparison efficiency vs i out ? tps62235 figure 10. comparison efficiency vs i out ? tps62236 figure 11. comparison efficiency vs i out ? tps622311 figure 12. 2.5v output voltage accuracy forced pwm mode copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 9 tps622311 v = 1.1 v pfm out 30 40 50 60 70 80 90 v = 3.6 v in v = 4.2 v in v = 3.3 v in 0.1 1 10 100 1000 i - output current - ma o efficiency - % 30 40 50 60 70 80 90 v = 1.2 v pfm, mode = gnd out 0.1 1 10 100 1000 i - output current - ma o v = 3.6 v in v = 4.2 v in v = 3.3 v in efficiency - % 2.425 2.45 2.475 2.5 2.525 2.55 2.575 v - output voltage (dc) - v o 0.1 1 10 100 1000 i - output current - ma o mode = v , v = 2.5 v, l = 1 h, c = 4.7 f, t = 25c in out out a m m v = 5 v in v = 3.3 v in v = 4.2 v in v = 3.6 v in tps62236 v = 1.85 v pfm out 30 40 50 60 70 80 90 100 v = 3.6 v in v = 4.2 v in v = 3.3 v in 0.1 1 10 100 1000 i - output current - ma o efficiency - % TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com typical characteristics (continued) figure 13. 2.5v output voltage accuracy pfm/pwm mode figure 14. 1.8v output voltage accuracy pfm/pwm mode figure 15. 1.8v output voltage accuracy forced pwm mode figure 16. 1.2v output voltage accuracy forced pwm mode 10 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated 2.425 2.45 2.475 2.5 2.525 2.55 2.575 v - output voltage (dc) - v o 0.1 1 10 100 1000 i - output current - ma o v = 5 v in v = 3.3 v in v = 4.2 v in mode = gnd, v = 2.5 v, l = 1 h, c = 4.7 f, t = 25c out out a m m v = 3.6 v in 1.746 1.764 1.782 1.8 1.818 1.836 1.854 v = 5 v in v = 3.6 v in v = 4.2 v in mode = v , v = 1.8 v, l = 1 h, c = 4.7 f, t = 25c in out out a m m 0.1 1 10 100 1000 i - output current - ma o v = 3.3 v in v - output voltage (dc) - v o 1.746 1.764 1.782 1.8 1.818 1.836 1.854 0.1 1 10 100 1000 i - output current - ma o v = 5 v in v = 3.6 v in v = 4.2 v in mode = gnd, v = 1.8 v, l = 2.2 h, c = 4.7 f, t = 25c out out a m m 0.01 v = 3.3 v in v - output voltage (dc) - v o 1.164 1.176 1.188 1.2 1.212 1.224 1.236 v = 5 v in v = 4.2 v in mode = v , v = 1.2 v, l = 2.2 h, c = 4.7 f, t = 25c in out out a m m 0.1 1 10 100 1000 i - output current - ma o v - output voltage (dc) - v o v = 3.6 v in v = 3.3 v in TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 17. 1.2v output voltage accuracy pfm/pwm mode figure 18. switching frequency vs output current, 1.8v output voltage mode = gnd figure 19. switching frequency vs output current, 1.8v output figure 20. switching frequency vs output current, 1.8v output voltage mode = gnd voltage mode = v in copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 11 1.164 1.176 1.188 1.2 1.212 1.224 1.236 v = 5 v in v = 3.6 v in v = 4.2 v in mode = gnd, v = 1.2 v, l = 2.2 h, c = 4.7 f, t = 25c out out a m m v - output voltage (dc) - v o 0.01 1 10 100 1000 i - output current - ma o 0.1 v = 3.3 v in 0 100 200 300 400 500 i - output current - ma o 0 500 1000 1500 2000 2500 3000 3500 4000 f - frequency - khz mode = gnd, v = 1.8 v, l = 1 h, c = 4.7 f, t = 25c out out a m m v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in v = 3.3 v in v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in v = 3.3 v in 0 100 200 300 400 500 i - output current - ma o mode = v , v = 1.8 v, l = 2.2 h, c = 4.7 f, t = 25c in out out a m m 0 500 1000 1500 2000 2500 3000 3500 4000 f - frequency - khz 0 500 1000 1500 2000 2500 3000 3500 4000 0 100 200 300 400 500 v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in v = 3.3 v in i - output current - ma o f - frequency - khz mode = gnd, v = 1.8 v, l = 2.2 h, c = 4.7 f, t = 25c out out a m m TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com typical characteristics (continued) figure 21. switching frequency vs output current, 2.5v output figure 22. switching frequency vs output current, 2.5v output voltage mode = gnd voltage mode = v in figure 23. switching frequency vs output current, 1.2v output figure 24. switching frequency vs output current, 1.2v output voltage mode = gnd voltage mode = v in 12 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated 0 500 1000 1500 2000 2500 3000 f - frequency - khz 0 100 200 300 400 500 i - output current - ma o mode = v , v = 1.2 v, l = 2.2 h, c = 4.7 f, in out out m m t = 25c a v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in v = 3.3 v in v = 2 v in 0 500 1000 1500 2000 2500 3000 3500 0 100 200 300 400 500 i - output current - ma o v = 5 v in v = 2.3 v in v = 3.6 v in v = 4.2 v in v = 2.7 v in mode = gnd, v = 1.2 v, l = 2.2 h, c = 4.7 f, out out m m t = 25c a f - frequency - khz v = 3.3 v in v = 2 v in 0 500 1000 1500 2000 2500 3000 3500 4000 f - frequency - khz 0 100 200 300 400 500 i - output current - ma o v = 3.6 v in v = 3 v in v = 3.3 v in mode = gnd, v = 2.5 v, l = 2.2 h, c = 4.7 f, out out m m t = 25c a v = 4.2 v in v = 5 v in 0 500 1000 1500 2000 2500 3000 3500 4000 f - frequency - khz 0 100 200 300 400 500 i - output current - ma o mode = v , v = 2.5 v, l = 2.2 h, c = 4.7 f, in out out m m t = 25c a v = 5 v in v = 3.6 v in v = 4.2 v in v = 3 v in v = 3.3 v in TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 25. switching frequency vs output current, 1.2v output figure 26. switching frequency vs output current, 1.85v voltage mode = pfm ? tps62235 output voltage mode = pfm ? tps62236 figure 27. switching frequency vs output current, 1.1v output figure 28. quiescent current i q vs ambient temperature t a voltage mode = pfm ? tps622311 copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 13 0 500 1000 1500 2000 2500 3000 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 i - output current - a o f - frequency - khz tps622311 mode = gnd, v = 1.1 v, l = 2.2 h, c = 4.7 f out out m m v = 2.3 v in v = 2.7 v in v = 3.3 v in v = 4.2 v in v = 5 v in 10 15 20 25 30 35 i - quiescent current - a q m 2 2.5 3 3.5 4 4.5 5 5.5 6 v - input voltage - v in t = 85c a t = 60c a t = 25c a t = -40c a 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 i - output current - a o 0 500 1000 1500 2000 2500 f - frequency - khz v = 2.3 v in v = 2.7 v in v = 3.3 v in v = 3.6 v in v = 4.2 v in v = 5 v in tps62235mode = gnd, v = 1.2 v, l = 2.2 h, c = 4.7 f out out m m 0 500 1000 1500 2000 2500 3000 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 i - output current - a o f - frequency - khz tps62236mode = gnd, v = 1.85 v, l = 2.2 h, c = 4.7 f out out m m v = 2.3 v in v = 2.7 v in v = 3.3 v in v = 4.2 v in v = 5 v in v = 3.6 v in TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com typical characteristics (continued) figure 29. shutdown current i sd vs ambient temperature t a figure 30. pmos r dson vs supply voltage v in and ambient temperature t a figure 31. nmos r dson vs supply voltage v in and ambient figure 32. tps62231 1.8v psrr temperature t a 14 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 2 2.5 3 3.5 4 4.5 5 5.5 6 v - input voltage - v in r - static drain-source on-state resistance - ds(on) w t = 85c a t = 60c a t = 25c a t = -40c a nmos pmos 2 2.5 3 3.5 4 4.5 5 5.5 6 v - input voltage - v in 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 r - static drain-source on-state resistance - ds(on) w t = 85c a t = 60c a t = 25c a t = -40c a 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 2 2.5 3 3.5 4 4.5 5 5.5 6 t = 85c a t = 60c a t = 25c a t = -40c a i - shutdown current - a sd m v - input voltage - v in 0 10 20 30 40 50 60 70 80 90 100 10 100 1k 10k 100k 1m psrr - power supply rejection ratio - db f - frequency - khz i = 50 ma, mode = 0, forced pwm out i = 50 ma, mode = 1, pfm/pwm out i = 150 ma, pwm mode out v = 3.6 v, v = 1.8 v, c = 2.2 f, c = 4.7 f, in out in out m m l = 2.2 h m TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 33. pfm mode operation i out = 10ma figure 34. pfm mode operation i out = 10ma figure 35. forced pwm mode operation i out = 10ma figure 36. line transient response pfm mode copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 15 v = 1.8 v 20 mv/div out c = 4.7 f l = 2.2 h mode = gnd out m m i = 50 ma out t - time - 10 m s/div v = 3.6 v to 4.2 v 200 mv/div in v = 2.5v 20 mv/div out sw2 v/div i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h in out m m t - time - 1 m s/div mode = gnd i = 10 ma out v = 2.5v 20 mv/div out sw2 v/div i200 ma/div l v = 3.6v in c = 4.7 f out m l = 1 h m t - time - 1 m s/div mode = gnd i = 10 ma out v = 2.5 v 20 mv/div out sw2 v/div i200 ma/div l v = 3.6 v c = 4.7 f l = 1 h in out m m t - time - 500 n s/div mode = v i = 10 ma in out TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com typical characteristics (continued) figure 37. line transient response pwm mode figure 38. mode transition pfm / forced pwm mode figure 39. ac ? load regulation performance 2.5v v out pfm figure 40. ac ? load regulation performance 2.5v v out pwm mode mode 16 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated v = 1.8 v 20 mv/div out c = 4.7 f l = 2.2 h mode = v out in m m i = 50 ma out t - time - 100 m s/div v = 3.6 v to 4.2 v 200 mv/div in v = 1.8 v 20 mv/div out t - time - 1 m s/div mode: 0 v to 3.6 v2 v/div i200 ma/div coil v2 v/div sw pfm mode operation forced pwmmode operation c = 4.7 f l = 1 h v = 3.6 v, in out m m i = 10 ma out v = 2.5 v 50 mv/div out i = 5 ma to 200 ma sinusoidal 100 ma/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h mode = gnd in out m m t - time - 5 m s/div v = 2.5 v 50 mv/div out i = 5ma to 200ma sinusoidal 100ma/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h mode = v in out in m m t - time - 5 m s/div TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 41. ac ? load regulation performance 1.8v v out pfm figure 42. load transient response 5ma to 200ma pfm to mode pwm mode, v out 2.5v figure 43. load transient response 5ma to 200ma, forced figure 44. load transient response 5ma to 150ma, pfm to pwm mode, v out 2.5v pwm mode, v out 1.8v copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 17 v = 1.8 v 50 mv/div out i = 5 ma to 150 ma 1 0 0 m a / d i v out i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h mode = gnd in out m m t - time - 10 m s/div v = 2.5 v 50 mv/div out i = 5 ma to 200 ma 100 ma/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 1 h mode = gnd in out m m t - time - 5 m s/div v = 1.8 v 50 mv/div out i = 5 ma to 150 ma, 50 khz sinusoidal 100 ma/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h mode = gnd in out m m t - time - 4 m s/div v = 2.5 v 50 mv/div out i = 5 ma to 200 ma 100 ma/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 1 h mode = v in out in m m t - time - 5 m s/div TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com typical characteristics (continued) figure 45. load transient response 5ma to 150ma, forced figure 46. start up into 20 ? load, v out 2.5v pwm mode, v out 1.8v figure 47. startup in 1v pre-biased output figure 48. spurious output noise, 12r load, tps62231 18 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated sw2 v/div v = 0 v to 2.5 v 1 v/div out i50 ma/div in v = 3.6 v c = 4.7 f l = 1 h mode = gnd load = 20 r in out m m t - time - 20 m s/div en2 v/div v = 1.8 v 50 mv/div out i = 5 ma to 150 ma 100 ma/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h mode = v in out in m m t - time - 10 m s/div f - frequency noise stop 40 mhz 400 m 4 mhz 10n 300 m 200 m 100 m 700 m 500 m 1m 800 m 900 m 600 m start 0 hz tps62231mode = gnd, v = 1.8 v, r l = 2.2 h, (mipsz2012 2r2, size 2012) c = 4.7 f (size 0402) out load out = 12r m m ref lvl = 1mvrbw 30khz vbw 30khz swt 115ms v = 2.7v(green) in v = 3.6v(blue) in v = 3v(red) in v = 4.2v(yellow) in v = 1.8 v 1 v/div out i200 ma/div l v = 3.6 v c = 4.7 f l = 2.2 h mode = gnd i = 0 ma in out out m m sw 5 v/div en 2 v/div v pre bias = 1v out time base - 20 s/div m TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 typical characteristics (continued) figure 49. spurious output noise, 100r load, tps62231 detailed description the tps6223x synchronous step down converter family includes a unique hysteretic pwm controller scheme which enables switch frequencies over 3mhz, excellent transient and ac load regulation as well as operation with cost competitive external components. the controller topology supports forced pwm mode as well as power save mode operation. power save mode operation reduces the quiescent current consumption down to 22 m a and ensures high conversion efficiency at light loads by skipping switch pulses. in forced pwm mode, the device operates on a quasi fixed frequency, avoids pulse skipping, and allows filtering of the switch noise by external filter components. the tps6223x devices offer fixed output voltage options featuring smallest solution size by using only three external components. the internal switch current limit of typical 850ma supports output currents of up to 500ma, depending on the operating condition. a significant advantage of tps6223x compared to other hysteretic pwm controller topologies is its excellent dc and ac load regulation capability in combination with low output voltage ripple over the entire load range which makes this part well suited for audio and rf applications. operation once the output voltage falls below the threshold of the error comparator, a switch pulse is initiated, and the high side switch is turned on. it remains turned on until a minimum on time of t onmin expires and the output voltage trips the threshold of the error comparator or the inductor current reaches the high side switch current limit. once the high side switch turns off, the low side switch rectifier is turned on and the inductor current ramps down until the high side switch turns on again or the inductor current reaches zero. in forced pwm mode operation, negative inductor current is allowed to enable continuous conduction mode even at no load condition. copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 19 f - frequency noise stop 10 mhz 400 m 1 mhz 10n 300 m 200 m 100 m 700 m 500 m 1m 800 m 900 m v = 2.7v(green) in v = 3.6v(blue) in v = 3v(red) in v = 4.2v(yellow) in 600 m start 0 hz tps62231mode = gnd, v = 1.8 v, r l = 2.2 h, (mipsz2012 2r2, size 2012) c = 4.7 f (size 0402) out load out = 100r m m ref lvl = 1mvrbw 30khz vbw 30khz swt 28ms TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com power save mode connecting the mode pin to gnd enables the automatic pwm and power-save mode operation. the converter operates in quasi fixed frequency pwm mode at moderate to heavy loads and in the pfm (pulse frequency modulation) mode during light loads, which maintains high efficiency over a wide load current range. in pfm mode, the device starts to skip switch pulses and generates only single pulses with an on time of t onmin . the pfm mode frequency depends on the load current and the external inductor and output capacitor values. the pfm mode of tps6223x is optimized for low output voltage ripple if small external components are used. even at low output currents, the pfm frequency is above the audible noise spectrum and makes this operation mode suitable for audio applications. the on time t onmin can be estimated to: (1) therefore, the peak inductor current in pfm mode is approximately: (2) with t on : high side switch on time [ns] v in : input voltage [v] v out : output voltage [v] l : inductance [ m h] i lpfmpeak : pfm inductor peak current [ma] forced pwm mode pulling the mode pin high forces the converter to operate in a continuous conduction pwm mode even at light load currents. the advantage is that the converter operates with a quasi fixed frequency that allows simple filtering of the switching frequency for noise-sensitive applications. in this mode, the efficiency is lower compared to the power-save mode during light loads. for additional flexibility, it is possible to switch from power-save mode to forced pwm mode during operation. this allows efficient power management by adjusting the operation of the converter to the specific system requirements. 100% duty cycle low dropout operation the device starts to enter 100% duty cycle mode once the input voltage comes close to the nominal output voltage. in order to maintain the output voltage, the high side switch is turned on 100% for one or more cycles. with further decreasing v in the high side mosfet switch is turned on completely. in this case the converter offers a low input-to-output voltage difference. this is particularly useful in battery-powered applications to achieve longest operation time by taking full advantage of the whole battery voltage range. the minimum input voltage to maintain regulation depends on the load current and output voltage, and can be calculated as: (3) with: i out max = maximum output current plus inductor ripple current r ds(on) max = maximum p-channel switch rdson. r l = dc resistance of the inductor v out max = nominal output voltage plus maximum output voltage tolerance 20 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated ( ) in out out ds(on) l v min = v max + i max r max+ r out onmin in v t = 260 ns v in out lpfmpeak onmin (v v ) i = t l - TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 under voltage lockout the under voltage lockout circuit prevents the device from misoperation at low input voltages. it prevents the converter from turning on the switch or rectifier mosfet under undefined conditions. the tps6223x devices have a uvlo threshold set to 1.8v (typical). fully functional operation is permitted for input voltage down to the falling uvlo threshold level. the converter starts operation again once the input voltage trips the rising uvlo threshold level. soft start the tps6223x has an internal soft-start circuit that controls the ramp up of the output voltage and limits the inrush current during start-up. this limits input voltage drops when a battery or a high-impedance power source is connected to the input of the converter. the soft-start system generates a monotonic ramp up of the output voltage and reaches the nominal output voltage typically 100 m s after en pin was pulled high. should the output voltage not have reached its target value by this time, such as in the case of heavy load, the converter then operates in a current limit mode set by its switch current limits. tps6223x is able to start into a pre-biased output capacitor. the converter starts with the applied bias voltage and ramps the output voltage to its nominal value. enable / shutdown the device starts operation when en is set high and starts up with the soft start as previously described. for proper operation, the en pin must be terminated and must not be left floating. pulling the en pin low forces the device into shutdown, with a shutdown quiescent current of typically 0.1 m a. in this mode, the p and n-channel mosfets are turned off, the internal resistor feedback divider is disconnected, and the entire internal-control circuitry is switched off. the en input can be used to control power sequencing in a system with various dc/dc converters. the en pin can be connected to the output of another converter, to drive the en pin high and getting a sequencing of supply rails. short-circuit protection the tps6223x integrates a high side and low side mosfet current limit to protect the device against heavy load or short circuit. the current in the switches is monitored by current limit comparators. when the current in the p-channel mosfet reaches its current limit, the p-channel mosfet is turned off and the n-channel mosfet is turned on to ramp down the current in the inductor. the high side mosfet switch can only turn on again, once the current in the low side mosfet switch has decreased below the threshold of its current limit comparator. thermal shutdown as soon as the junction temperature, t j , exceeds 150 c (typical) the device goes into thermal shutdown. in this mode, the high side and low side mosfets are turned-off. the device continues its operation when the junction temperature falls below the thermal shutdown hysteresis. copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 21 TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com application information figure 50. TPS62230 2.5v output figure 51. tps62231 1.8v output figure 52. tps62232 1.2v output output filter design (inductor and output capacitor) the tps6223x is optimized to operate with effective inductance values in the range of 0.7 m h to 4.3 m h and with effective output capacitance in the range of 2.0 m f to 15 m f. the internal compensation is optimized to operate with an output filter of l = 1.0 m h/2.2 m h and c out = 4.7 m f. larger or smaller inductor/capacitor values can be used to optimize the performance of the device for specific operation conditions. for more details, see the checking loop stability section. inductor selection the inductor value affects its peak-to-peak ripple current, the pwm-to-pfm transition point, the output voltage ripple and the efficiency. the selected inductor has to be rated for its dc resistance and saturation current. the inductor ripple current ( i l ) decreases with higher inductance and increases with higher v i n or v o ut . equation 4 calculates the maximum inductor current under static load conditions. the saturation current of the inductor should be rated higher than the maximum inductor current as calculated with equation 5 . this is recommended because during heavy load transient the inductor current will rise above the calculated value. (4) (5) with: f = switching frequency l = inductor value i l = peak to peak inductor ripple current i lmax = maximum inductor current 22 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated 1.2 v v out 2.05 v - 6 v v in 2.2 f m c in l 1/2.2 h m c 4.7 f out m tps62232 vinen mode sw fb gnd TPS62230 l 1/2.2 h m vinen mode gnd fb sw 2.5 v v out 2.7 v - 6 v v in 2.2 c in m f 4.7 f m c out l lmax outmax i i = i + 2 d l vout 1 vin i = vout l - d | 1.8 v v out 2.05 v - 6 v v in 2.2 f m c in l 1/2.2 h m c 4.7 f out m tps62231 vinen mode sw fb gnd TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 in high-frequency converter applications, the efficiency is essentially affected by the inductor ac resistance (i.e., quality factor) and to a smaller extent by the inductor dcr value. to achieve high efficiency operation, care should be taken in selecting inductors featuring a quality factor above 25 at the switching frequency. increasing the inductor value produces lower rms currents, but degrades transient response. for a given physical inductor size, increased inductance usually results in an inductor with lower saturation current. the total losses of the coil consist of both the losses in the dc resistance, r (dc) , and the following frequency-dependent components: ? the losses in the core material (magnetic hysteresis loss, especially at high switching frequencies) ? additional losses in the conductor from the skin effect (current displacement at high frequencies) ? magnetic field losses of the neighboring windings (proximity effect) ? radiation losses the following inductor series from different suppliers have been used with the tps6223x converters. table 1. list of inductors inductance dimensions inductor type supplier [ m h] [mm3] 1.0/2.2 2.5 2.0 1.2 lqm2hpn1r0mj0 murata 2.2 2.0 1.2 0.55 lqm21pn2r2 murata 1.0/2.2 2.0 1.2 1.0 mipsz2012 fdk 1.0/2.2 2.0 2.5 1.2 mipsa2520 fdk 1.0/2.2 2.0 1.2 1.0 ksli2012 series hitachi metal output capacitor selection the unique hysteretic pwm control scheme of the TPS62230 allows the use of tiny ceramic capacitors. ceramic capacitors with low esr values have the lowest output voltage ripple and are recommended. the output capacitor requires either an x7r or x5r dielectric. y5v and z5u dielectric capacitors, aside from their wide variation in capacitance over temperature, become resistive at high frequencies. at light load currents the converter operate in power save mode and the output voltage ripple is dependent on the output capacitor value and the pfm peak inductor current. higher output capacitor values minimize the voltage ripple in pfm mode and tighten dc output accuracy in pfm mode. input capacitor selection because of the nature of the buck converter having a pulsating input current, a low esr input capacitor is required for best input voltage filtering and minimizing the interference with other circuits caused by high input voltage spikes. for most applications a 2.2 m f to 4.7 m f ceramic capacitor is recommended. the input capacitor can be increased without any limit for better input voltage filtering. because ceramic capacitor loses up to 80% of its initial capacitance at 5v, it is recommended to use 4.7 m f input capacitors for input voltages > 4.5v. take care when using only small ceramic input capacitors. when a ceramic capacitor is used at the input and the power is being supplied through long wires, such as from a wall adapter, a load step at the output or v in step on the input can induce ringing at the vin pin. this ringing can couple to the output and be mistaken as loop instability or could even damage the part by exceeding the maximum ratings. table 2 shows a list of tested input/output capacitors. table 2. list of capacitor capacitance [ m f] size capacitor type supplier 2.2 0402 grm155r60j225 murata 4.7 0402 amk105bj475mv taiyo yuden 4.7 0402 grm155r60j475 murata 4.7 0402 cl05a475mq5nrnc samsung 4.7 0603 grm188r60j475 murata copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 23 TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 slvs941c ? april 2009 ? revised april 2010 www.ti.com checking loop stability the first step of circuit and stability evaluation is to look from a steady-state perspective at the following signals: ? switching node, sw ? inductor current, i l ? output ripple voltage, v out(ac) these are the basic signals that need to be measured when evaluating a switching converter. when the switching waveform shows large duty cycle jitter or the output voltage or inductor current shows oscillations, the regulation loop may be unstable. this is often a result of board layout and/or l-c combination. as a next step in the evaluation of the regulation loop, the load transient response is tested. the time between the application of the load transient and the turn on of the p-channel mosfet, the output capacitor must supply all of the current required by the load. v out immediately shifts by an amount equal to i (load) x esr, where esr is the effective series resistance of c out . i (load) begins to charge or discharge c o generating a feedback error signal used by the regulator to return v out to its steady-state value. the results are most easily interpreted when the device operates in pwm mode. during this recovery time, v out can be monitored for settling time, overshoot or ringing that helps judge the converter ? s stability. without any ringing, the loop has usually more than 45 of phase margin. because the damping factor of the circuitry is directly related to several resistive parameters (e.g., mosfet r ds(on) ) that are temperature dependant, the loop stability analysis has to be done over the input voltage range, load current range, and temperature range. layout considerations as for all switching power supplies, the layout is an important step in the design. proper function of the device demands careful attention to pcb layout. care must be taken in board layout to get the specified performance. if the layout is not carefully done, the regulator could show poor line and/or load regulation, stability issues as well as emi problems. it is critical to provide a low inductance, impedance ground path. therefore, use wide and short traces for the main current paths. the input capacitor should be placed as close as possible to the ic pins as well as the inductor and output capacitor. use a common power gnd node and a different node for the signal gnd to minimize the effects of ground noise. keep the common path to the gnd pin, which returns the small signal components and the high current of the output capacitors as short as possible to avoid ground noise. the fb line should be connected to the output capacitor and routed away from noisy components and traces (e.g. sw line). figure 53. recommended pcb layout for tps6223x 24 submit documentation feedback copyright ? 2009 ? 2010, texas instruments incorporated v in gnd v out c 1 c2 l1 total area is less than 12mm2 TPS62230, tps62231, tps62232, tps62233, tps62234 tps62235, tps62236, tps62237, tps62238, tps62239 tps622310, tps622311, tps622312, tps622313, tps622314 www.ti.com slvs941c ? april 2009 ? revised april 2010 revision history note: page numbers of current version may differ from previous versions. changes from original (april 2009) to revision a page ? added device numbers tps62233, tps62234, tps62238, tps62239, and tps622310 to the data sheet ...................... 1 changes from revision a (august 2009) to revision b page ? added device numbers tps62235, tps62236, tps62237, tps622311 ............................................................................ 1 ? changed the title from: 3 mhz ultra small step down converter in 1x1.5 son package to: 2 mhz / 3 mhz ultra small step down converter in 1x1.5 son package ............................................................................................................ 1 ? changed feature: from: 3 mhz switch frequency to: 2 mhz / 3 mhz switch frequency .................................................... 1 ? added figure 8 ..................................................................................................................................................................... 8 ? added figure 9 ..................................................................................................................................................................... 8 ? added figure 10 ................................................................................................................................................................... 8 ? added figure 11 ................................................................................................................................................................... 9 ? added figure 25 ................................................................................................................................................................. 12 ? added figure 26 ................................................................................................................................................................. 12 ? added figure 27 ................................................................................................................................................................. 13 ? added figure 48 ................................................................................................................................................................. 18 ? added figure 49 ................................................................................................................................................................. 18 changes from revision b (december 2009) to revision c page ? added device numbers tps622312, tps622313, and tps622314 .................................................................................... 1 ? added ordering information for devices tps622312, tps622313, and tps622314 ........................................................... 2 copyright ? 2009 ? 2010, texas instruments incorporated submit documentation feedback 25 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) TPS62230dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim TPS62230dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622310dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622310dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622311dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622311dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622312dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622312dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622313dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622313dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622314dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps622314dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62231dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62231dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62232dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62232dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62233dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62233dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62234dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62234dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62235dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62235dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62236dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62236dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62237dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim package option addendum www.ti.com 22-apr-2010 addendum-page 1 orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) tps62237dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62238dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62238dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62239dryr active son dry 6 5000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim tps62239dryt active son dry 6 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. package option addendum www.ti.com 22-apr-2010 addendum-page 2 tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant TPS62230dryr son dry 6 5000 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 TPS62230dryt son dry 6 250 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 tps62231dryr son dry 6 5000 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 tps62231dryt son dry 6 250 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 tps62232dryr son dry 6 5000 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 tps62232dryt son dry 6 250 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 tps62233dryr son dry 6 5000 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 tps62233dryt son dry 6 250 179.0 8.4 1.2 1.65 0.7 4.0 8.0 q1 package materials information www.ti.com 31-mar-2010 pack materials-page 1 *all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) TPS62230dryr son dry 6 5000 220.0 205.0 50.0 TPS62230dryt son dry 6 250 220.0 205.0 50.0 tps62231dryr son dry 6 5000 220.0 205.0 50.0 tps62231dryt son dry 6 250 220.0 205.0 50.0 tps62232dryr son dry 6 5000 220.0 205.0 50.0 tps62232dryt son dry 6 250 220.0 205.0 50.0 tps62233dryr son dry 6 5000 220.0 205.0 50.0 tps62233dryt son dry 6 250 220.0 205.0 50.0 package materials information www.ti.com 31-mar-2010 pack materials-page 2 important notice texas instruments incorporated and its subsidiaries (ti) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. all products are sold subject to ti?s terms and conditions of sale supplied at the time of order acknowledgment. ti warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with ti?s standard warranty. testing and other quality control techniques are used to the extent ti deems necessary to support this warranty. except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. ti assumes no liability for applications assistance or customer product design. customers are responsible for their products and applications using ti components. to minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. ti does not warrant or represent that any license, either express or implied, is granted under any ti patent right, copyright, mask work right, or other ti intellectual property right relating to any combination, machine, or process in which ti products or services are used. information published by ti regarding third-party products or services does not constitute a license from ti to use such products or services or a warranty or endorsement thereof. use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from ti under the patents or other intellectual property of ti. reproduction of ti information in ti data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. reproduction of this information with alteration is an unfair and deceptive business practice. ti is not responsible or liable for such altered documentation. information of third parties may be subject to additional restrictions. resale of ti products or services with statements different from or beyond the parameters stated by ti for that product or service voids all express and any implied warranties for the associated ti product or service and is an unfair and deceptive business practice. ti is not responsible or liable for any such statements. ti products are not authorized for use in safety-critical applications (such as life support) where a failure of the ti product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of ti products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by ti. further, buyers must fully indemnify ti and its representatives against any damages arising out of the use of ti products in such safety-critical applications. ti products are neither designed nor intended for use in military/aerospace applications or environments unless the ti products are specifically designated by ti as military-grade or "enhanced plastic." only products designated by ti as military-grade meet military specifications. buyers acknowledge and agree that any such use of ti products which ti has not designated as military-grade is solely at the buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. ti products are neither designed nor intended for use in automotive applications or environments unless the specific ti products are designated by ti as compliant with iso/ts 16949 requirements. buyers acknowledge and agree that, if they use any non-designated products in automotive applications, ti will not be responsible for any failure to meet such requirements. following are urls where you can obtain information on other texas instruments products and application solutions: products applications amplifiers amplifier.ti.com audio www.ti.com/audio data converters dataconverter.ti.com automotive www.ti.com/automotive dlp? products www.dlp.com communications and www.ti.com/communications telecom dsp dsp.ti.com computers and www.ti.com/computers peripherals clocks and timers www.ti.com/clocks consumer electronics www.ti.com/consumer-apps interface interface.ti.com energy www.ti.com/energy logic logic.ti.com industrial www.ti.com/industrial power mgmt power.ti.com medical www.ti.com/medical microcontrollers microcontroller.ti.com security www.ti.com/security rfid www.ti-rfid.com space, avionics & www.ti.com/space-avionics-defense defense rf/if and zigbee? solutions www.ti.com/lprf video and imaging www.ti.com/video wireless www.ti.com/wireless-apps mailing address: texas instruments, post office box 655303, dallas, texas 75265 copyright ? 2010, texas instruments incorporated |
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