View AP3581AMP-G1_7181058.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 1 general description the 1 ap3581a/b/c 1 is 1 a 1 compact 1 synchronous-rect ified buck controller specifically designed to operate from 5v/12v supply and deliver high-quality output voltage as low as 0.6v (ap3581a) or 0.8v (ap3581b/c). the ap3581a/b/c operates at fixed frequency of 300khz (ap3581a/b) or 200khz (ap3581c) and provides an optimal level of integration to reduce size and cost of the power supply. this controller integrates internal mosfet drivers that support 12v+12v bootstrapped voltage for high- efficiency power conversion. the bootstrap diode is built-in to simplify the circuit design and minimize external part count. this controller provides single feedback loop, voltage-mode control with fast transient response. the error amplifier features a 10mhz gain-bandwidth product and 6v/s slew rate which enables high converter bandwidth for fast transient performance. other features include internal soft-start, under voltage protection, over current protection and shutdown function. with afore-mentioned functions, this part provides cu stomers a compact, high efficiency, well-protected and cost-effective solutions. the ap3581a/b/c is available in psop-8 package. features ? supply voltage: 5v/12v ? v in input range: 3.0v to 13.2v ? 0.6v/0.8v to 80% of v in output range ? internal reference: 0.6v/0.8v ? simple single-loop control ? voltage-mode pwm control ? duty cycle: 0% to 80% ? fast transient response ? 10mhz high-bandwidth error amplifier with 6v/s slew rate ? fixed oscillator frequency: 300khz/200khz ? lossless, programmabl e over current protection (uses lower mosfet r ds(on) ) ? start-up into pre-biased output ? built-in thermal shutdown ? built-in soft-start ? over current/voltage protection ? under voltage protection ? integrated boot diode applications ? power supplies for microprocessors/peripherals ? pcs, embedded controllers, memory supplies ? dsp and core communications processor supplies ? subsystem power supplies ? pci, agp, graphics cards, digital tv ? sstl-2 and ddr/2/3 sdram bus termination supply ? cable modems, set top boxes, and dsl modems ? industrial power supplies and general purpose supplies ? 5v/12v input dc-dc regulators ? low-voltage distributed power supplies figure 1. package type of ap3581a/b/c psop-8
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 2 pin configuration mp package (psop-8) 1 2 3 4 8 7 6 5 figure 2. pin configuration of ap3581a/b/c (top view) pin description pin number pin name function 1 boot bootstrap pin. connect a bootstrap capacitor (typically from 0.1 f to 0.47 f) from this pin to phase pin to create a boot voltage suitable to drive a standard n-channel mosfet 2 ugate upper-gate drive pin. connect th is pin to the upper mosfet gate p roviding the gate drive. this pi n is monitored by the adaptive shoot-through protection circuitry to determine when the upper mosfet has been turned off 3 ops over-current setting pin. connecting a resistor (r ocset ) between ops and gnd to set the ove r-current trigger point 4 lgate lower-gate drive pin. connect lgate to the lower mosfet gate providing the gate drive for the lower mosfet. this pin is monitored by the adaptive shoot-through protection circuitry to determine when the lower mosfet has turned off 5 vcc bias supply pin. provides a 5v or 12v bias supply for the chip from this pin. the pin should be bypassed with a capacitor to gnd 6 fb feedback pin. this pin is the inverting input of the internal error amplifier. use fb pin, in combination with the comp pin, to compensate the voltage control feedback loop of the converter. a resistor divider from output to gnd is used to set the output voltage 7 comp/en compensation and disable pin, this pin is the output of the error amplifier. pull comp pin low will shut down the ic 8 phase phase pin. this pin connects to the source of the upper mosfet and the drain of the lower mosfet. this pin is also monitored by the adaptive shoot- through protection circuitry to determine when the upper mosfet has turned off 9 gnd exposed pad as ground pin. represents the signal and power ground for the ic. tie this pin to the ground island/plane through the lowest impedance connection available
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 3 functional block diagram figure 3. functional block diagram of ap3581a/b/c ordering information ap3581 a a - package temperature range part number marking id packing type AP3581AMP-G1 3581amp-g1 tube ap3581amptr-g1 3581amp-g1 tape & reel ap3581bmp-g1 3581bmp-g1 tube ap3581bmptr-g1 3581bmp-g1 tape & reel ap3581cmp-g1 3581cmp-g1 tube psop-8 -40 to 85c ap3581cmptr-g1 3581cmp-g1 tape & reel bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green. g1: green blank: tube tr: tape & reel circuit type a:ap3581a b:ap3581b c:ap3581c package mp: psop-8
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 4 absolute maximum ratings (note 1) parameter symbol value unit supply voltage v cc -0.3 to 15 v boot voltage v boot -0.3 to v phase +15 v voltage from ugate to phase v ugate -0.3 to 15 v voltage from phase, lgate pin to gnd v phase , v lgate -1 to 15 v voltage on other separate pin -0.3 to 6 v thermal resistance ja 50 oc/w operating junction temperature t j -40 to 125 oc storage temperature t stg -65 to 150 oc lead temperature (soldering, 10 sec) t lead 260 oc esd (human body model) (note 2) 2000 v esd (machine model) (note 2) 200 v note 1: stresses greater than 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 co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. note 2: devices are esd sensitiv e. handling precaution recommended. recommended operating conditions parameter symbol min max unit supply input voltage v cc 4.5 13.2 v operating junction temperature range t j -40 125 c operating ambient temperature t a -40 85 c
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 5 electrical characteristics v cc =12v, t a =25 c, unless otherwise specified. parameter symbol conditions min typ max unit supply input supply voltage v cc 4.5 13.2 v supply current i cc ugate and lgate pin open; v cc =12v, switching 5 ma quiescent supply current i cc_q v fb =v ref +0.1v, no switching 4 ma power input voltage v in 3.0 13.2 v power on reset v cc rising threshold v por v cc rising 4.0 4.2 4.4 v v cc threshold hysteresis v por_hys 500 mv oscillator ap3581a/b 270 300 330 oscillator frequency f osc ap3581c 180 200 220 khz ramp amplitude ? v osc v cc =12v 1.8 v error amplifier open loop dc gain (note 3) g dc_ol 55 70 db gain bandwidth (note 3) g bw 10 mhz slew rate (note 3) sr 3 6 v/ s transconductance 800 1100 a/v output source current v fb v ref 80 120 a pwm controller gate drivers upper gate source current i ug_src v boot -v phase =12v, v boot -v ugate =6v -1 a upper gate sink current i ug_snk v boot -v phase =12v, v boot -v ugate =6v 1.5 a upper gate sink resistance r ugate 50ma sink current, v boot -v phase =12v 1.6 3.2 ? lower gate source current i lg_src v cc -v lgate =6v -1 a lower gate sink current i lg_snk v lgate =6v 1.5 a lower gate sink resistance r lgate 50ma sink current, v cc =12v 1 2 ? phase falling to lgate rising delay v phase <1.2v to v lgate >1.2v 50 ns
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 6 electrical characteristics (continued) v cc =12v, t a =25oc, unless otherwise specified. parameter symbol conditions min typ max unit lgate falling to ugate rising delay v lgate <1.2v to (v ugate -v phase )>1.2v 50 ns minimum duty cycle 0 % maximum duty cycle 75 80 85 % reference voltage ap3581a 0.591 0.6 0.609 v feedback voltage v fb ap3581b/c 0.788 0.8 0.812 v protection under voltage protection v fb_uvp 0.3 0.4 0.5 v over current source i ops 30 40 50 a ap3581a 2.0 ap3581b 2.7 soft-start interval t ss ap3581c 3.6 ms enable threshold v comp/en 0.25 0.30 0.35 v thermal shutdown t otsd 160 oc thermal shutdown hysteresis t hys 20 oc note 3: not tested, guaranteed by design. typical performance characteristics figure 4. line regulation figure 5. load regulation 4 5 6 7 8 9 1011121314 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 v out =1.2v, i out =5a output voltage variation (%) input voltage (v) 0 2 4 6 8 10 12 14 16 18 20 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 v in =12v,v out =1.2v output voltage variation (%) output current (a)
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 7 -50 -25 0 25 50 75 100 125 150 240 250 260 270 280 290 300 310 320 330 340 350 360 for ap3581a switching frequency (khz) temperature ( o c) -50 -25 0 25 50 75 100 125 150 0.50 0.52 0.54 0.56 0.58 0.60 0.62 0.64 0.66 0.68 0.70 feedback voltage (v) temperature ( c) for ap3581a 4 5 6 7 8 9 1011121314 240 250 260 270 280 290 300 310 320 330 340 350 360 switching frequency (khz) input voltage (v) for ap3581a 4 5 6 7 8 9 10 11 12 13 14 0.50 0.52 0.54 0.56 0.58 0.60 0.62 0.64 0.66 0.68 0.70 feedback voltage (v) input voltage (v) for ap3581a typical performance characteristics (continued) figure 6. switching frequency vs. temper ature figure 7. switching frequency vs. input voltage figure 8. feedback voltage vs. temperature figure 9. feedback voltage vs. input voltage
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 8 typical performance characteristics (continued) figure 10. power-on waveform figure 11. power-off waveform (v in =12v, v out =1.2v, i out =0a) (v in =12v, v out =1.2v, i out =20a) figure 12. enable waveform figure 13. disable waveform (v in =12v, v out =1.2v, i out =0a) (v in =12v, v out =1.2v, i out =20a) v in 10v/div v out 0.5v/div v comp 0.5v/div v lgate 10v/div time 1ms/div v in 10v/div v out 0.5v/div v phase 10v/div i l 10a/div time 200
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 9 typical performance characteristics (continued) figure 14. load transient response figure 15. load transient response (v in =12v, v out =1.2v, i out =0a to 10a) (v in =12v, v out =1.2v, i out =0a to 20a) figure 16. ugate turn off waveforms figure 17. ugate turn on waveforms (v cc =v in =12v, v out =1.2v, i out =20a) (v cc =v in =12v, v out =1.2v, i out =20a) v phase 5v/div v out_ac 200mv/div i out 5a/div time 10
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 10 typical performance characteristics (continued) figure 18. over current protection figure 19. over voltage protection (v in =12v, v out =1.2v to 0v, i out =0a) (v in =12v, v out =1.2v, i out =20a) v out 1v/div v comp 0.5v/div v phase 10v/div i l 10a/div v fb 1v/div v lgate 10v/div v ugate 20v/div i l 10a/div time 10ms/div time 80
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 11 typical application figure 20. typical application circuit of ap3581a/b/c
data sheet single phase synchronous buck pwm controller ap3581a/b/c oct. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 12 mechanical dimensions psop-8 unit: mm(inch) 3.202(0.126) 3.402(0.134)
important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited

▲Up To Search▲

Price & Availability of AP3581AMP-G1

	To Download AP3581AMP-G1 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .