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1a ultra low dropout linear regulator az2940 data sheet 1 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited general description the az2940 is a low dropout three-terminal regulator with a typical dropout of 280mv at 1a output current. the az2940 provides current limit and thermal shut- down. on-chip thermal shutdown provides protection against any combination of high current and ambient temperature that would cr eate excessive junction tem- peratures. the az2940 has 2.5v, 3.3v and 5.0v versions. the az2940 is available in the industry standard to- 220-3, to-263-3 and to-252-2 power packages. features minimum guaranteed output current: 1a dropout voltage at i out =1a: 280mv output accuracy: 1% low ground current internal current limit and thermal protection reversed-battery and reversed-lead insertion protection fast transient response applications lcd tv set top box lcd monitor smps post regulator laptop, palmtop and notebook portable instrumentation usb power supply figure 1. package types of az2940 to-220-3 to-263-3 to-252-2
1a ultra low dropout linear regulator az2940 data sheet 2 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited figure 2. pin configuration of az2940 (top view) 3 2 1 3 2 1 v out gnd v in v out gnd v in t package (to-220-3) pin configuration pin description pin number pin name function 1v in unregulated input. 2 gnd ground pin. this pin and tab are internally connected. 3v out regulated output. 3 2 1 v out gnd v in s package (to-263-3) d package (to-252-2)
data sheet 3 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited 1a ultra low dropout linear regulator az2940 functional block diagram figure 3. functional block diagram of az2940 16v thermal shutdown reference + - 1.24v v in v out gnd 1 2 3
1a ultra low dropout linear regulator az2940 data sheet 4 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited package temperature range part number marking id packing type tin lead lead free tin lead lead free to-220-3 az2940t-2.5 az2940t-2.5e1 az2940t-2.5 az2940t-2.5e1 tube az2940t-3.3 az2940t-3.3e1 az2940t-3.3 az2940t-3.3e1 tube az2940t-5.0 az2940t-5.0e1 az2940t-5.0 az2940t-5.0e1 tube to-263-3 az2940s-2.5 az2940s-2.5e1 az 2940s-2.5 az2940s-2.5e1 tube az2940s-2.5tr az2940s-2.5tre1 az2940s -2.5 az2940s-2.5e1 tape & reel az2940s-3.3 az2940s-3.3e1 az 2940s-3.3 az2940s-3.3e1 tube az2940s-3.3tr az2940s-3.3tre1 az2940s -3.3 az2940s-3.3e1 tape & reel az2940s-5.0 az2940s-5.0e1 az 2940s-5.0 az2940s-5.0e1 tube az2940s-5.0tr az2940s-5.0tre1 az2940s -5.0 az2940s-5.0e1 tape & reel to-252-2 az2940d-2.5 az2940d-2.5e1 az2940d-2.5 az2940d-2.5e1 tube az2940d-2.5tr az2940d-2.5tre1 az2940d-2.5 az2940d-2.5e1 tape & reel az2940d-3.3 az2940d-3.3e1 az2940d-3.3 az2940d-3.3e1 tube az2940d-3.3tr az2940d-3.3tre1 az2940d-3.3 az2940d-3.3e1 tape & reel az2940d-5.0 az2940d-5.0e1 az2940d-5.0 az2940d-5.0e1 tube az2940d-5.0tr az2940d-5.0tre1 az2940d-5.0 az2940d-5.0e1 tape & reel -40 to 125 o c -40 to 125 o c -40 to 125 o c bcd semiconductor's pb-free products, as designated with "e1" suffix in th e part number, are rohs compliant. package circuit type t: to-220-3 az2940 s: to-263-3 - 3.3: fixed output 3.3v blank: tin lead e1: lead free tr: tape and reel blank: tube 5.0: fixed output 5.0v d: to-252-2 2.5: fixed output 2.5v ordering information
1a ultra low dropout linear regulator az2940 data sheet 5 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited parameter symbol min max unit supply voltage v in 13.2 v operating junction temperature t j -40 125 o c 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 op eration of the device at th ese or any other conditions beyond those indicated under "recommended operating condi tions" is not implied. exposure to "absolute max- imum ratings" for extended periods may affect device reliability. parameter symbol value unit supply voltage v in 16 v maximum operating junction temperature t j 150 o c storage temperature range t stg -65 to 150 o c lead temperature (soldering, 10sec) t lead 300 o c esd (machine model) 300 v recommended operating conditions absolute maximum ratings (note 1)
1a ultra low dropout linear regulator az2940 data sheet 6 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited operating conditions: v in =3.5v, i out =10ma, c in =10 f , c out =10 f , t j =25 o c, unless otherwise specified. the boldface applies over -40 o c t j 125 o c. parameter symbol condition min typ max unit output voltage v out i out =10ma 2.475 2.5 2.525 v 10ma i out 1 a, 3.5v v in 13.2v 2.45 2.5 2.55 v line regulation v rline i out =10ma, 3.5v v in 13.2v 5.0 25 mv load regulation v rload v in =3.5v, 10ma i out 1a 7.5 37.5 mv output voltage temperature coefficient ? v out / ? ti out =10ma 50 250 v/ o c dropout voltage (note 2) v drop ? v out =1% i out =100ma 70 200 mv i out =1a 280 550 mv ground current i gnd v in =3.5v i out =750ma 12 25 ma i out =1a 18 ma current limit i limit v out =0v (note 3) 1.5 2.2 a minimum load current i load (min) 15ma output noise voltage (rms) 10hz to 100khz, i out =100ma, c out =10 f 400 v electrical characteristics az2940-2.5v electri cal characteristics note 2: dropout voltage is defined as th e input-to-output differential when the outpu t voltage drops to 99% of its nominal valu e which is measured at v out +1v applied to v in . note 3: v in =v out(nominal) +1v.
data sheet 7 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited 1a ultra low dropout linear regulator az2940 operating conditions: v in =4.3v, i out =10ma, c in =10 f , c out =10 f , t j =25 o c, unless otherwise specified. the boldface applies over -40 o c t j 125 o c. parameter symbol condition min typ max unit output voltage v out i out =10ma 3.27 3.3 3.33 v 10ma i out 1 a, 4.3v v in 13.2v 3.23 3.3 3.37 v line regulation v rline i out =10ma, 4.3v v in 13.2v 6.6 33 mv load regulation v rload v in =4.3v, 10ma i out 1a 9.9 50 mv output voltage temperature coefficient ? v out / ? ti out =10ma 66 330 v/ o c dropout voltage (note 2) v drop ? v out =1% i out =100ma 70 200 mv i out =1a 280 550 mv ground current i gnd v in =4.3v i out =750ma 12 25 ma i out =1a 18 ma current limit i limit v out =0v (note 3) 1.5 2.2 a minimum load current i load (min) 15ma output noise voltage (rms) 10hz to 100khz, i out =100ma, c out =10 f 400 v az2940-3.3v electri cal characteristics note 2: dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal valu e which is measured at v out +1v applied to v in . note 3: v in =v out(nominal) +1v. electrical characteristics (continued)
1a ultra low dropout linear regulator az2940 data sheet 8 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited electrical characteristics (continued) parameter symbol condition min typ max unit output voltage v out i out =10ma 4.95 5.0 5.05 v 10ma i out 1 a, 6v v in 13.2v 4.90 5.0 5.10 v line regulation v rline i out =10ma, 6v v in 13.2v 10 50 mv load regulation v rload v in =6v, 10ma i out 1a 15 75 mv output voltage temperature coefficient ? v out / ? t i out =10ma 100 500 v/ o c dropout voltage (note 2) v drop ? v out =1% i out =100ma 70 200 mv i out =1a 280 550 mv ground current i gnd v in =6v i out =750ma 12 25 ma i out =1a 18 ma current limit i limit v out =0v (note 3) 1.5 2.2 a minimum load current i load (min) 15 ma output noise voltage (rms) 10hz to 100khz, i out =100ma, c out =10 f 400 v az2940-5.0v electri cal characteristics note 2: dropout voltage is defined as th e input-to-output differential when the output voltage drops to 99% of its nominal value which is measured at v out +1v applied to v in . note 3: v in =v out(nominal) +1v. operating conditions: v in =6v, i out =10ma, c in =10 f , c out =10 f , t j =25 o c, unless otherwise specified. the boldface applies over -40 o c t j 125 o c.
data sheet 9 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited 1a ultra low dropout linear regulator az2940 0 250 500 750 1000 1250 1500 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 ground current (ma) output current (ma) v in =6v az2940-5.0v typical performance characteristics figure 4. line regulation figure 5. load regulation figure 6. ground current vs. output current figure 7. ground current vs. input voltage 6 7 8 9 10 11 12 13 14 15 16 5.000 5.002 5.004 5.006 5.008 5.010 5.012 5.014 5.016 5.018 5.020 output voltage (v) supply voltage (v) v in =6v i out =10ma az2940-5.0v 0 250 500 750 1000 1250 1500 5.0000 5.0025 5.0050 5.0075 5.0100 5.0125 5.0150 5.0175 5.0200 5.0225 5.0250 output voltage (v) output current (ma) v in =6v az2940-5.0v 0246810121416 0 2 4 6 8 10 12 14 16 18 20 ground current (ma) input voltage (v) i out =100ma i out =1a
1a ultra low dropout linear regulator az2940 data sheet 10 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited typical performance ch aracteristics (continued) figure 8. dropout voltage vs. output current figure 9. ground current vs. temperature figure 10. ground current vs. temperature 0 250 500 750 1000 1250 1500 0 50 100 150 200 250 300 350 400 450 500 dropout voltage (mv) output current (ma) az2940-5.0v -25 0 25 50 75 100 125 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 ground current (ma) temperature ( o c) v in =6v i out =10ma az2940-5.0v -25 0 25 50 75 100 125 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 ground current (ma) temperature ( o c) v in =6v i out =500ma az2940-5.0v figure 11. ground current vs. temperature -25 0 25 50 75 100 125 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 ground current (ma) temperature ( o c) v in =6v i out =1a az2940-5.0v
data sheet 11 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited 1a ultra low dropout linear regulator az2940 -25 0 25 50 75 100 125 200 225 250 275 300 325 350 375 400 425 450 475 500 dropout voltage (mv) temperature ( o c) i out =750ma az2940-5.0v figure 12. dropout voltage vs. temperature figure 14. output volt age vs. temperature typical performance ch aracteristics (continued) figure 13. dropout voltage vs. temperature -25 0 25 50 75 100 125 4.95 4.96 4.97 4.98 4.99 5.00 5.01 5.02 5.03 5.04 5.05 output voltage (v) temperature ( o c) v in =6v i out =10ma az2940-5.0v -25 0 25 50 75 100 125 200 225 250 275 300 325 350 375 400 425 450 475 500 dropout voltage (mv) temperature ( o c) i out =1a az2940-5.0v 0 20406080100 0.01 0.1 1 10 100 stable range c out =2.2 f v out =5v t a =25 o c unstable range equivalent series resistance ( ? ) output current (ma) figure 15. output capacitor esr
1a ultra low dropout linear regulator az2940 data sheet 12 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited typical performance ch aracteristics (continued) figure 17. load transient output current output voltage c l =10 f az2940-5.0v 0 200 400 600 800 1000 0.01 0.1 1 10 100 stable range equivalent series resistance ( ? ) output current (ma) c out =10 f v out =5v t a =25 o c unstable range figure 18. load transient figure 19. line transient input voltage output voltage output current output voltage i out =10ma c l =47 f az2940-5.0v az2940-5.0v figure 16. output capacitor esr
1a ultra low dropout linear regulator az2940 data sheet 13 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited typical performance ch aracteristics (continued) figure 20. power dissipation vs. case temperature -25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 40 45 50 case temperature ( o c) power dissipation (w) package:to-220-3 45*43mm 2 heatsink no heatsink -25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 40 45 50 case temperature ( o c) power dissipation (w) package:to-252-2 45*43mm 2 heatsink no heatsink figure 21. power dissipation vs. case temperature -25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 40 45 50 case temperature ( o c) power dissipation (w) package:to-263-3 45*43mm 2 heatsink no heatsink figure 22. power dissipation vs. case temperature
1a ultra low dropout linear regulator az2940 data sheet 14 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited figure 23. typical application of az2940 v in v out gnd + v in v out az2940 c in c out 1 3 2 + typical application note: c in is required if regulator is loca ted far from power supply filter and is recommended to be 0.47 f or greater. to main- tain stability, c out is recommended to be 2.2 f or greater. the esr of this capacitor is critical, please see curve.
data sheet 15 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited 1a ultra low dropout linear regulator az2940 mechanical dimensions to-220-3 unit: mm(inch) 9 3.560(0.140) 1 4 . 2 3 0 ( 0 . 5 6 0 ) 1.160(0.046) 0.813(0.032) 8 . 7 6 3 ( 0 . 3 4 5 ) 2.540(0.100) 0.356(0.014) 2.080(0.082) 3 7 3.560(0.140) 7 9.660(0.380) 0.550(0.022) 60 0.381(0.015) 2 . 5 8 0 ( 0 . 1 0 2 ) 6 0 8 . 5 2 0 ( 0 . 3 3 5 ) 9 1.500(0.059) 0.200(0.008) 1 . 8 5 0 ( 0 . 0 7 3 ) 2.540(0.100) 0.381(0.015) 0.406(0.016) 3 . 3 8 0 ( 0 . 1 3 3 ) 10.660(0.420) 4.060(0.160) 1.350(0.053) 2 7 . 8 8 0 ( 1 . 0 9 8 ) 3 0 . 2 8 0 ( 1 . 1 9 2 ) 9 . 5 2 0 ( 0 . 3 7 5 ) 1 6 . 5 1 0 ( 0 . 6 5 0 ) 4.820(0.190) 2.880(0.113) 1.760(0.069)
1a ultra low dropout linear regulator az2940 data sheet 16 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited mechanical dimens ions (continued) to-263-3 unit: mm(inch) 7 3 7 8 . 6 4 0 ( 0 . 3 4 0 ) 9 . 6 5 0 ( 0 . 3 8 0 ) 0.990(0.039) 0.510(0.020) 2.540(0.100) 1.150(0.045) 9.650(0.380) 3 1 4 . 7 6 0 ( 0 . 5 8 1 ) 8.840(0.348) 2.640(0.104) 0.020(0.001) 8 2 0 6 0.380(0.015) 2 . 3 9 0 ( 0 . 0 9 4 ) 0.360(0.014) 2 . 2 0 0 ( 0 . 0 8 7 ) 7 0 10.290(0.405) 4 . 0 7 0 ( 0 . 1 6 0 ) 4 . 8 2 0 ( 0 . 1 9 0 ) 1.390(0.055) 1.150(0.045) 1.390(0.055) 2.540(0.100) 1.270(0.050) 1.390(0.055) 2 . 6 9 0 ( 0 . 1 0 6 ) 1 5 . 7 4 0 ( 0 . 6 2 0 ) 0.250(0.010) 2.700(0.106) 0.400(0.016) 5 . 6 0 0 ( 0 . 2 2 0 ) 7.420(0.292) 7.980(0.314) 2.540(0.100) 2.540(0.100)
data sheet 17 sep. 2005 rev. 1. 4 bcd semiconductor manufacturing limited 1a ultra low dropout linear regulator az2940 mechanical dimens ions (continued) to-252-2 unit: mm(inch) 1 7 1 . 4 0 0 ( 0 . 0 5 5 ) 0.020(0.001) 0.460(0.018) 2.240(0.088) 0 . 6 5 0 ( 0 . 0 2 6 ) 9 . 5 0 0 ( 0 . 3 7 4 ) 0.750(0.030) 0.640(0.025) 5.230(0.206) 6.380(0.251) 2 . 6 0 0 ( 0 . 1 0 2 ) 5 . 3 6 0 ( 0 . 2 1 1 ) 2.180(0.086) 0 . 6 0 0 ( 0 . 0 2 4 ) 5 5 8 0.400(0.016) 0.510(0.020) 0.480(0.019) 1.080(0.043) ? 45 6.680(0.263) 0.580(0.023) 2.380(0.094) 5.430(0.214) 0 . 9 5 0 ( 0 . 0 3 7 ) 1 0 . 1 0 0 ( 0 . 3 9 8 ) 2.340(0.092) 2.240(0.088) 2.340(0.092) 0.780(0.031) 0.850(0.033) 1 . 7 6 0 ( 0 . 0 6 9 ) 5 . 5 6 0 ( 0 . 2 1 9 ) 1.320(0.052) 0.540(0.021) 0.120(0.005) 3 . 0 0 0 ( 0 . 1 1 8 ) 2.90 3.10 2.90 3.10
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 27b, tower c, 2070, middle shen nan road, shenzhen 518031, china tel: +86-755-8368 3987, fax: +86-755-8368 3166 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 3170 de la cruz blvd., suite 105, santa clara, ca 95054-2411, u.s.a tel: +1-408-988 6388, fax: +1-408-988 6386 - 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

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