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? semiconductor components industries, llc, 2012 february, 2012 ? rev. 1 1 publication order number: ncp4688/d ncp4688 150 ma, low noise, ldo linear voltage regulator the ncp4688 is a cmos 150 ma ldo linear voltage regulator with high output voltage accuracy which features a low noise output voltage and high ripple rejection. the low level of output noise 10 vrms typically is kept at any output voltage. the very common sot23 ? 5 package and small dfn 1x1 package are suitable for industrial applications, portable communication equipments and rf modules. features ? operating input voltage range: 2 v to 5.25 v ? output voltage range: 1.2 to 4.8 v (available in 0.1 v steps) ? 1% output voltage accuracy ? output noise: 10 vrms ? line regulation: 0.02%/v ? current limit circuit ? high psrr: 80 db at 1 khz, 75 db at 10 khz ? available in sot ? 23 ? 5 and dfn 1.0 x 1.0 mm package ? these are pb ? free devices typical applications ? home appliances, industrial equipment ? cable boxes, satellite receivers, entertainment systems ? car audio equipment, navigation systems ? notebook adaptors, lcd tvs, cordless phones and private lan systems ? rf modules figure 1. typical application schematic vin vout ce gnd vin vout ncp4688x c2 1.0 f c1 1.0 f http://onsemi.com see detailed ordering and shipping information in the package dimensions section on p age 12 of this data sheet. ordering information xx, xxx = specific device code m, mm = date code = pb ? free package marking diagrams (*note: microdot may be in either location) sot ? 23 ? 5 case 1212 1 udfn ? 4 case 517br xx m (top views) 1 xxxmm 1
ncp4688 http://onsemi.com 2 figure 2. simplified schematic block diagram current limit vin gnd vref ce vout noise reduction ncp4688xxxx current limit vin gnd vref ce vout noise reduction ncp4688d table 1. pin function description pin no. sot ? 23 ? 5 pin no. dfn 1x1 pin name description 1 4 vin input pin 2 2 gnd ground pin 3 3 ce chip enable pin (?h? active) 4 nc non connected 5 1 vout output pin *ep ep exposed pad (leave floating or connect to gnd) table 2. absolute maximum ratings rating symbol value unit input voltage v in 0 ? 6 v v output voltage v out ? 0.3 to v in + 0.3 v chip enable input v ce 0 ? 6 v v power dissipation sot ? 23 ? 5 p d 420 mw power dissipation dfn 1.0 x 1.0 mm 400 junction temperature t j ? 40 to 150 c storage temperature t stg ? 55 to 125 c esd capability, human body model (note 1) esd hbm 2000 v esd capability, machine model (note 1) esd mm 200 v stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. this device series incorporates esd protection and is tested by the following methods: esd human body model tested per aec ? q100 ? 002 (eia/jesd22 ? a114) esd machine model tested per aec ? q100 ? 003 (eia/jesd22 ? a115) latchup current maximum rating tested per jedec standard: jesd78
ncp4688 http://onsemi.com 3 table 3. thermal characteristics rating symbol value unit thermal characteristics, sot ? 23 ? 5 thermal resistance, junction ? to ? air r ja 238 c/w thermal characteristics, dfn 1x1 thermal resistance, junction ? to ? air r ja 250 c/w table 4. electrical characteristics ( ? 40 c t a 85 c; c in = c out = 1.0 f, unless otherwise noted. typical values are at t a = +25 c.) parameter test conditions symbol min typ max unit operating input voltage 1.2 v < vout < 4.8 v v in 2.0 5.25 v output voltage ta = 25 c, vout > 2.0 v v out x0.99 x1.01 v ? 40 c < ta < 85 c, vout > 2.0 v x0.985 x1.015 v ta = 25 c, vout 2.0 v ? 20 +20 mv ? 40 c < ta < 85 c, vout 2.0 v ? 30 +30 mv output voltage temp. coefficient ? 40 c < ta < 85 c 100 ppm/ c line regulation set vout + 0.3 < v in < 5.25 v vout > 4.1 v line reg 0.02 0.10 %/v set vout + 0.5 < v in < 5.0 v 1.7 v v out < 4.1 v 2.2 < v in < 5.0 v vout < 1.7 v load regulation 1 ma < i out 150 ma load reg ? 14 0 14 mv dropout voltage i out = 150 ma 1.2 v v out < 1.3 v v do 0.39 0.80 v 1.3 v v out < 1.4 v 0.37 0.70 1.4 v v out 1.5 v 0.34 0.60 1.5 v v out < 1.7 v 0.32 0.50 1.7 v v out < 2.0 v 0.29 0.41 2.0 v v out < 2.5 v 0.25 0.36 2.5 v v out < 2.8 v 0.22 0.31 2.8 v v out 4.8 v 0.20 0.28 output current i out 150 ma short current limit v out = 0 v i sc 40 ma quiescent current iout = 0 ma vout > 4.1 v i q 80 100 a vout 4.1 v 75 standby current v in = v in max , v ce = 0 v i stb 0.1 1.0 a ce pin pull ? down current i pd 0.3 0.6 a ce pin threshold voltage ce input voltage ?h? v ceh 1.0 v in v ce input voltage ?l? v cel 0.4 power supply rejection ratio v out > 4.1 v @ v in = 5.25 v, v out 4.1 v @ v in = set v out + 1.0 v, v in_pk ? pk = 0.2 v, i out = 30 ma f = 1 khz psrr 80 db f = 10 khz 75 f = 100 khz 65 output noise voltage i out = 30 ma, f = 10 hz to 100 khz v noise 10 v rms autodischarge nmos resistance v in = 4.0 v, v ce = 0.0 v r dson 60 ohm
ncp4688 http://onsemi.com 4 typical characteristics figure 3. output voltage vs. output current ncp4688xx12 figure 4. output voltage vs. output current ncp4688xx25 output current (ma) output current (ma) 250 200 150 100 50 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 300 250 200 150 100 50 0 0 0.5 1.0 1.5 2.0 2.5 3.0 figure 5. output voltage vs. output current ncp4688xx40 figure 6. output voltage vs. input voltage ncp4688xx12 output current (ma) input voltage (v) 300 250 200 150 100 50 0 0 0.5 1.0 2.0 2.5 3.0 4.0 4.5 6 5 4 3 2 1 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 figure 7. output voltage vs. input voltage ncp4688xx25 figure 8. output voltage vs. input voltage ncp4688xx40 input voltage (v) input voltage (v) 6 5 4 3 2 1 0 0 0.5 1.0 1.5 2.0 2.5 3.0 6 5 4 3 2 1 0 0 0.5 1.5 2.0 2.5 3.0 4.0 4.5 output voltage (v) output voltage (v) output voltage (v) output voltage (v) output voltage (v) output voltage (v) vin = 2.0 v vin = 3.0 v vin = 4.0 v vin = 5.25 v vin = 2.8 v vin = 3.0 v vin = 4.0 v vin = 5.25 v 1.5 3.5 vin = 4.8 v vin = 4.5 v vin = 4.3 v vin = 5.25 v iout = 1 ma iout = 30 ma iout = 50 ma iout = 1 ma iout = 30 ma iout = 50 ma iout = 1 ma iout = 30 ma iout = 50 ma 1.0 3.5
ncp4688 http://onsemi.com 5 typical characteristics figure 9. supply current vs. input voltage ncp4688xx12 figure 10. supply current vs. input voltage ncp4688xx25 input voltage (v) input voltage (v) 6 5 4 3 2 1 0 0 10 20 30 40 60 70 80 6 5 4 3 2 1 0 0 10 30 40 50 60 80 90 figure 11. supply current vs. input voltage ncp4688xx40 figure 12. supply current vs. temperature ncp4688xx12 input voltage (v) temperature ( c) 6 5 4 3 2 1 0 0 10 20 30 50 70 80 90 100 75 50 25 0 ? 25 ? 50 50 55 60 65 70 75 80 figure 13. supply current vs. temperature ncp4688xx25 figure 14. supply current vs. temperature ncp4688xx40 temperature ( c) temperature ( c) 100 75 50 25 0 ? 25 ? 50 50 55 60 65 70 75 80 100 75 50 25 0 ? 25 ? 50 50 55 60 65 70 75 80 supply current ( a) supply current ( a) supply current ( a) supply current ( a) supply current ( a) supply current ( a) 50 20 70 40 60
ncp4688 http://onsemi.com 6 typical characteristics figure 15. output voltage vs. temperature ncp4688xx12 figure 16. output voltage vs. temperature ncp4688xx25 temperature ( c) temperature ( c) 100 75 50 25 0 ? 25 ? 50 1.190 1.195 1.200 1.205 1.210 1.215 1.220 100 75 50 25 0 ? 25 ? 50 2.47 2.48 2.49 2.50 2.51 2.52 2.53 figure 17. output voltage vs. temperature ncp4688xx40 figure 18. dropout voltage vs. output current ncp4688xx12 temperature ( c) output current (ma) 100 75 50 25 0 ? 25 ? 50 3.96 3.97 3.98 3.99 4.00 4.01 4.02 150 120 90 60 30 0 0 0.05 0.15 0.20 0.30 0.35 0.45 0.50 figure 19. dropout voltage vs. output current ncp4688xx25 figure 20. dropout voltage vs. output current ncp4688xx40 output current (ma) output current (ma) 150 120 90 60 30 0 0 0.05 0.10 0.15 0.20 0.25 0.30 150 120 90 60 30 0 0 0.05 0.10 0.15 0.20 0.25 output voltage (v) output voltage (v) output voltage (v) dropout voltage (v) dropout voltage (v) dropout voltage (v) 0.10 0.25 0.40 ? 40 c 25 c 85 c ? 40 c 25 c 85 c ? 40 c 25 c 85 c
ncp4688 http://onsemi.com 7 typical characteristics figure 21. psrr vs. frequency ncp4688xx12 figure 22. psrr vs. frequency ncp4688xx25 frequency (hz) frequency (hz) 1m 100k 10k 1k 100 30 40 50 70 80 90 110 120 30 40 50 60 80 100 110 120 figure 23. psrr vs. frequency ncp4688xx40 figure 24. output noise density vs. frequency ncp4688xx12 frequency (hz) frequency (hz) 30 40 50 70 80 90 110 120 0 0.1 0.2 0.3 0.4 0.6 0.7 0.8 figure 25. output noise density vs. frequency ncp4688xx25 figure 26. output noise density vs. frequency ncp4688xx40 frequency (hz) frequency (hz) 1m 100k 10k 1k 100 10 0 0.1 0.2 0.3 0.4 0.5 0.7 0.8 0 0.1 0.2 0.3 0.4 0.6 0.7 0.8 psrr (db) psrr (db) psrr (db) v / sqrt hz v / sqrt hz v / sqrt hz 60 100 iout = 1 ma iout = 50 ma iout = 150 ma 70 90 iout = 1 ma iout = 50 ma iout = 150 ma iout = 1 ma iout = 50 ma iout = 150 ma 60 100 0.5 0.6 0.5 vin = 2.2 v vin = 3.5 v vin = 5.0 v 1m 100k 10k 1k 100 1m 100k 10k 1k 100 1m 100k 10k 1k 100 1m 100k 10k 1k 100 10
ncp4688 http://onsemi.com 8 typical characteristics figure 27. line transient response ncp4688xx12 figure 28. line transient response ncp4688xx25 t ( s) t ( s) 320 280 240 160 120 80 40 0 1.197 1.198 1.200 1.201 1.203 360 280 240 200 120 80 40 0 2.497 2.498 2.500 2.501 2.502 figure 29. line transient response ncp4688xx40 figure 30. load transient response load step 1 ma to 150 ma ncp4688xx12 figure 31. load transient response load step 50 ma to 100 ma ncp4688xx12 figure 32. load transient response load step 1 ma to 150 ma ncp4688xx25 200 360 400 1.199 1.202 2.2 3.2 3.7 2.7 v in (v) v out (v) 2.499 2.503 v out (v) v in (v) 3.5 4.5 5.0 4.0 160 320 400 t ( s) t ( s) 320 280 240 160 120 80 40 0 3.997 3.998 4.000 4.001 4.003 180 140 120 100 60 40 20 0 1.12 1.14 1.18 1.20 1.22 200 360 400 3.999 4.002 4.25 5.25 5.75 4.75 v in (v) v out (v) 1.16 1.24 v out (v) i out (ma) 0 150 225 75 80 160 200 t ( s) t ( s) 160 140 120 80 60 40 20 0 1.16 1.17 1.19 1.20 1.22 1.23 180 140 120 100 60 40 20 0 2.42 2.44 2.48 2.50 2.52 100 180 200 1.18 1.21 0 100 150 50 i out (ma) v out (v) 2.46 2.54 v out (v) i out (ma) 0 150 225 75 80 160 200 vin = 2.2 v vin = 2.2 v vin = 3.5 v iout = 30 ma iout = 30 ma iout = 30 ma
ncp4688 http://onsemi.com 9 typical characteristics figure 33. load transient response load step 50 ma to 100 ma ncp4688xx25 figure 34. load transient response load step 1 ma to 150 ma ncp4688xx40 t ( s) t ( s) 160 140 120 80 60 40 20 0 2.46 2.47 2.49 2.50 2.52 2.53 180 140 120 100 60 40 20 0 3.92 3.94 3.98 4.00 4.02 4.06 figure 35. load transient response load step 50 ma to 100 ma ncp4688xx40 figure 36. turn off with ce behavior ncp4688dx12 figure 37. turn off with ce behavior ncp4688dx25 figure 38. turn off with ce behavior ncp4688dx40 100 180 200 2.48 2.51 0 100 150 50 i out (ma) v out (v) 3.96 4.04 v out (v) i out (ma) 0 150 225 75 80 160 200 t ( s) t (ms) 160 140 120 80 60 40 20 0 3.96 3.97 3.99 4.00 4.02 4.03 0.9 0.7 0.6 0.5 0.3 0.2 0.1 0 ? 0.5 0 1.0 1.5 2.0 100 180 200 3.98 4.01 0 100 150 50 i out (ma) v out (v) 0.5 2.5 v out (v) v ce (v) 0 2.2 3.3 1.1 0.4 0.8 1.0 t (ms) t (ms) 0.8 0.7 0.6 0.4 0.3 0.2 0.1 0 ? 0.5 0 1.0 1.5 2.5 0.9 0.7 0.6 0.5 0.3 0.2 0.1 0 ? 1.0 0 2.0 3.0 4.0 0.5 0.9 1.0 0.5 2.0 0 3.50 5.25 1.75 v ce (v) v out (v) 1.0 5.0 v out (v) v ce (v) 0 5.0 7.5 2.5 0.4 0.8 1.0 iout = 1 ma iout = 30 ma iout = 150 ma chip enable iout = 1 ma iout = 30 ma iout = 150 ma chip enable iout = 1 ma iout = 30 ma iout = 150 ma chip enable vin = 3.5 v vin = 5.0 v vin = 5.0 v
ncp4688 http://onsemi.com 10 typical characteristics iout = 1 ma iout = 30 ma iout = 150 ma chip enable figure 39. turn on with ce behavior ncp4688xx12 figure 40. turn on with ce behavior ncp4688xx25 t ( s) t ( s) 160 140 120 80 60 40 20 0 ? 0.5 0 1.0 1.5 2.5 180 140 120 100 60 40 20 0 ? 0.5 0 1.0 1.5 2.0 100 180 200 0.5 2.0 0 2.2 3.3 1.1 v ce (v) v out (v) 0.5 2.5 v out (v) v ce (v) 0 3.50 5.25 1.75 80 160 200 iout = 1 ma iout = 30 ma iout = 150 ma chip enable
ncp4688 http://onsemi.com 11 application information a typical application circuit for ncp4688 series is shown in the figure 41. vin vout ce gnd c1 c2 vin vout ncp4688x figure 41. typical application schematic 1.0 f 1.0 f input decoupling capacitor (c1) a 1.0 f ceramic input decoupling capacitor should be connected as close as possible to the input and ground pin of the ncp4688 device. higher values and lower esr improves line transient response. output decoupling capacitor (c2) a 1.0 f ceramic output decoupling capacitor is suf ficient to achieve stable operation of the device. if tantalum capacitor is used, and its esr is high, the loop oscillation may result. for information about esr see figures 42, 43 and 44. the capacitor should be connected as close as possible to the output and ground pin. larger values and lower esr improves dynamic parameters. enable operation the enable pin ce may be used for turning the regulator on and off. the ic is switched on when a high level voltage is applied to the ce pin. the enable pin has an internal pull down current source which assure off state of ldo in case the ce pin will stay floating. if the enable function is not needed connect ce pin to v in . the d version of the ncp4688 device includes a transistor between v out and gnd that is used for faster discharging of the output capacitor. this function is activated when the ic goes into disable mode. thermal consideration as a power across the ic increase, it might become necessary to provide some thermal relief. the maximum power dissipation supported by the device is dependent upon board design and layout. mounting pad configuration on the pcb, the board material, and also the ambient temperature affect the rate of temperature increase for the part. when the device has good thermal conductivity through t he pcb the junction temperature will be relatively low in high power dissipation applications. esr vs. output current when using the ncp4688 devices, consider the following points: the relation between output current iout and esr of the output capacitor are shown below in figures 42, 43 and 44. the conditions when the device performs stable operation are marked as the hatched area in the charts. figure 42. esr vs. load current ncp4688xx12 figure 43. esr vs. load current ncp4688xx25 load current (ma) load current (ma) 150 125 100 75 50 25 0 0.01 0.1 1 10 100 150 125 100 75 50 25 0 0.01 0.1 1 10 100 esr ( ) esr ( )
ncp4688 http://onsemi.com 12 figure 44. esr vs. load current ncp4688xx40 load current (ma) 150 125 100 75 50 25 0 0.01 0.1 1 10 100 esr ( ) ordering information device marking nominal output voltage feature package shipping ? ncp4688dmu12tcg 3a 1.2 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel ncp4688dmu15tcg 3e 1.5 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel ncp4688dmu18tcg 3h 1.8 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel ncp4688dmu25tcg 3r 2.5 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel ncp4688dmu28tcg 3u 2.8 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel ncp4688dmu30tcg 3x 3.0 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel ncp4688dmu33tcg 4a 3.3 v auto discharge dfn1010 (pb ? free) 10000 / tape & reel NCP4688DSN12T1G l12 1.2 v auto discharge sot ? 23 (pb ? free) 3000 / tape & reel ncp4688dsn15t1g l15 1.5 v auto discharge sot ? 23 (pb ? free) 3000 / tape & reel ncp4688dsn18t1g l18 1.8 v auto discharge sot ? 23 (pb ? free) 3000 / tape & reel ncp4688dsn25t1g l25 2.5 v auto discharge sot ? 23 (pb ? free) 3000 / tape & reel ncp4688dsn28t1g l28 2.8 v auto discharge sot ? 23 (pb ? free) 3000 / tape & reel ncp4688dsn33t1g l33 3.3 v auto discharge sot ? 23 (pb ? free) 3000 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
ncp4688 http://onsemi.com 13 package dimensions udfn4 1.0x1.0, 0.65p case 517br ? 01 issue o notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b applies to plated terminal and is measured between 0.15 and 0.20 mm from terminal. 4. coplanarity applies to the exposed pad as well as the terminals. a b e d d2 bottom view b e 4x note 3 2x 0.05 c pin one reference top view 2x 0.05 c a a1 (a3) 0.05 c 0.05 c c seating plane side view l 3x 1 2 dim min max millimeters a ??? 0.60 a1 0.00 0.05 a3 0.10 ref b 0.20 0.30 d 1.00 bsc d2 0.43 0.53 e 1.00 bsc e 0.65 bsc l 0.20 0.30 l2 0.27 0.37 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. mounting footprint* detail a 1.30 0.30 0.53 4x dimensions: millimeters 0.52 2x recommended package outline l2 detail a l3 detail b l3 0.02 0.12 detail b note 4 e/2 d2 45 a m 0.05 b c 4 3 0.65 pitch 4x typ c 0.18 0.23 4x 0.43 3x 0.10 3x
ncp4688 http://onsemi.com 14 package dimensions sot ? 23 5 ? lead case 1212 ? 01 issue a dim min max millimeters a1 0.00 0.10 a2 1.00 1.30 b 0.30 0.50 c 0.10 0.25 d 2.70 3.10 e 2.50 3.10 e1 1.50 1.80 e 0.95 bsc l l1 0.45 0.75 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimensions: millimeters. 3. datum c is the seating plane. a 1 5 23 4 d e1 b l1 e e c m 0.10 c s b s a b 5x a2 a1 s 0.05 c l 0.20 --- *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* 0.95 dimensions: millimeters pitch 5x 3.30 0.56 5x 0.85 a --- 1.45 recommended a on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 ncp4688/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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