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data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 1 general description the ap3583/a is a simple single-phase synchronous buck controller. it operates from 5v or 12v supply voltage and delivers high quality output voltage as low as 0.6v. this device operates at fixed 200khz (ap3583) or 300khz (ap3583a) frequency and provides an optimum compromise between efficiency, external component size and cost. with integrated linear regulator bootstrap diode, and n-channel mosfet gate drives, the ap3583/a can reduce external component count and board space requirements. the ap3583/a supports both tracking mode and stand-alone mode operation. the output voltage is tightly regulated to the external reference voltage from 0.4v to 3v at tracking mode or internal 0.6v reference at stand-alone mode. other features include internal soft-start, under voltage protection, over current protection and shutdown function. with aforementioned functions, this part provides cu stomers a compact, high efficiency, well-protected and cost-effective solutions. the ap3583/a is available in psop-8 package. features ? supply voltage: 5v/12v ? v in input range: 3.0v to 13.2v ? 0.6v to 80% of v in output range ? internal reference: 0.6v ? support tracking mode and stand-alone mode ? simple single-loop control ? voltage-mode pwm control ? duty cycle: 0% to 80% ? fast transient response ? fixed oscillator frequency: 200/300khz ? 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 and 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 ap3583/a psop-8
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 2 pin configuration mp package (psop-8) 1 2 3 4 8 7 6 5 figure 2. pin configuratio n of ap3583/a (top view) pin description pin number pin name function 1 boot bootstrap pin. connect a bootstrap capacitor (typically from 0.1 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 been 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. a resistor divider from output to gnd is us ed to set the output voltage 7 refin external reference input pin. th is pin receives a voltage with range from 0.4v to 3.0v as the reference voltage at the non-inverting input of the error amplifier. pull this pin lower than 0.3v to disable the controller, and the v ugate and v lgate will go low. let this pin open for internal 0.6v reference use 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 is turned off 9 gnd exposed pad as ground pin. represents the signal and power ground for the ic. tie this pin to ground island/plane through the lowest impedance c onnection available
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 3 functional block diagram otp soft-start power-on reset (por) internal regulator 4v int 0.6v oscillator pwm gate control logic error amplifier pwm comparator vcc 0.3v enable 137.5%v ref ovp refin gnd ops lgate phase ugate boot vcc 9 3 4 8 2 1 5 reference selection ocp comparator 40 a fb 6 7 figure 3. functional block diagram of ap3583/a ordering information ap3583 - package temperature range part number marking id packing type ap3583mp-g1 3583mp-g1 tube ap3583mptr-g1 3583mp-g1 tape & reel AP3583AMP-G1 3583amp-g1 tube psop-8 -40 to 85c ap3583amptr-g1 3583amp-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 blank: ap3583 a: ap3583a package mp: psop-8
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 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 t j -40 125 c operating ambient temperature t a -40 85 c
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 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 1 and 1 lgate pin 1 open; v cc =12v, 1 switching 3 ma quiescent supply current i cc_q v fb =v ref +0.1v, no switching 2 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 300 mv oscillator ap3583 180 200 220 oscillator frequency f osc ap3583a 270 300 330 khz ramp amplitude ? v osc v cc =12v 1.0 v 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 v cc =12v, 50ma source current 1 2 ? phase falling to lgate rising delay v phase <1.2v to v lgate >1.2v 50 ns 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 feedback voltage v fb stand-alone mode 0.591 0.6 0.609 v
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 6 electrical characteristics (continued) v cc =12v, t a =25 , unless otherwise specified. parameter symbol conditions min typ max unit v fb -v refin , 1 v refin =0.4v to 1.0v, tracking mode 15 mv output voltage accuracy v fb -v refin /v refin , v refin =1.0v to 3.0v, tracking mode 1.5 % refin enable threshold v refin 0.3 0.35 v protection under voltage protection v fb_uvp 0.3 0.4 0.5 v over current source i ops 30 40 50 a ap3583, 1 stand-alone mode 2.6 soft-start interval t ss ap3583a, 1 stand-alone mode 2.0 ms thermal shutdown t otsd 160 oc thermal shutdown hysteresis t hys 20 oc typical performance characteristics figure 4. line regulation figure 5. load regulation 4567891011121314 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 v out =1.2v, i out =10a output voltage variation (%) input voltage (v) 0 2 4 6 8 10 12 14 16 18 20 22 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 v in =12v, v out =1.2v output voltage variation (%) output current (a)
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 7 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 -50 -25 0 25 50 75 100 125 150 0.500 0.525 0.550 0.575 0.600 0.625 0.650 0.675 0.700 feedback voltage (v) temperature ( o c) 4567891011121314 0.595 0.596 0.597 0.598 0.599 0.600 0.601 0.602 0.603 0.604 0.605 feedback voltage (v) input voltage (v) -50 -25 0 25 50 75 100 125 150 240 250 260 270 280 290 300 310 320 330 for ap3583a switching frequency (khz) temperature ( o c) 4567891011121314 240 250 260 270 280 290 300 310 320 330 340 350 360 for ap3583a switching frequency (khz) input voltage (v)
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 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 =0a) 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 lgate 5v/div i l 10a/div time 1ms/div v in 10v/div v out 0.5v/div i l 5a/div time 200ms/div v refin 5v/div v out 0.5v/div v phase 10v/div time 1ms/div time 40
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 9 typical performance characteristics (continued) figure 14. refin operation figure 15. power input detection (v in =12v, v out =1.2v, i out =5a) (v in =12v, v out =1.2v, i out =0a) figure 16. ugate turn-off waveforms figure 17. ugate turn-on waveforms (v in =12v, v out =1.2v, i out =20a) (v in =12v, v out =1.2v, i out =20a) v refin 2v/div v lgate 10v/div time 10ms/div v lgate 10v/div i l 10a/div v ugate-phase 2v/div v phase 2v/div v lgate 2v/div time 40ns/div v lgate 2v/div v phase 2v/div v ugate-phase 2v/div time 40ns/div time 1ms/div v out 2v/div v out 0.5v/div v in 5v/div v ugate 5v/div v ugate 5v/div
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 10 typical performance characteristics (continued) figure 18. load transient response figure 19. load transient response (v in =12v, v out =1.2v, i out =0 to 10a; 4a/ s) (v in =12v, v out =1.2v, i out =0 to 20a; 4a/ s) figure 20. over current protection figure 21. over voltage protection (v in =12v, v out =1.2v to 0v, i out =0a) (v in =12v, v out =1.2v, i out =0a) v out (ac) 200mv/div v phase 5v/div i out 5a/div time 10 s/div v phase 5v/div i out 10a/div time 10 s/div i l 10a/div time 20 m s/div v ugate 20v/div i l 10a/div time 80 s/div v out 0.5v/div v phase 10v/div v fb 1v/div v lgate 10v/div v out (ac) 200mv/div
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 11 typical application figure 22. typical application circuit of ap3583/a
data sheet single phase synchronous buck pwm cont roller with reference input ap3583/a dec. 2011 rev. 1. 1 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

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