http://www.belling.com.cn - 1- 8/16/2006 total 10 pages low noise, fast response 500ma ldo regulator BL8558 general description BL8558 series is a group of positive voltage output, low power consumption, low dropout voltage regulator. BL8558 can provide output value in the range of 1.2v~4.5v every 0.1v step. it also can be customized on command. BL8558 includes high accuracy voltage reference, error amplifier, current limit circuit and output driver module with discharge capability. BL8558 has excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and power system. and it uses trimming technique to guarantee output voltage accuracy within 2%. BL8558 is available in sot-23-5, sot89-3, sot23-3, to92 packages which are lead free. features low power consumption: 75ua typ. low output noise (47uvrms) standby mode: 0.1ua low dropout voltage: 0.46v@500ma (typ.) high ripple rejection: 66db@100hz (typ.) low temperature coefficient: 100ppm/ c excellent line regulation: 0.05%/v build-in chip enable and discharge circuit output voltage range: 1.2v~4.5v (customized on command every 0.1v step) highly accurate: 2% ( 1% customized) output current limit applications power source for cellular phones and various kind of pcss battery powered equipment power management of mp3, pda, dsc, mouse, ps2 games reference voltage source regulation after switching power BL8558 typical application circuit BL8558 typical performance characteristics BL8558 BL8558-2.8v output 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 0 200 400 600 iload(ma) vout(v)
http://www.belling.com.cn - 2- 8/16/2006 total 10 pages BL8558 pin assignment BL8558-xxpsa BL8558-xxpsb BL8558-xxprm BL8558-xxprn BL8558-xxpt BL8558-xxprc selection guide BL8558 - xx x x package type sa sot-89-3 sb sot-89-3 rm sot-23-3 rn sot-23-5 a type pin assignment rc sot-23-5 c type pin assignment t to-92 features p standard defualt lead free c customized output voltage 12 1.2v 15 1.5v 28 2.8v 30 3.0v 35 3.5v 45 4.5v a type c type
http://www.belling.com.cn - 3- 8/16/2006 total 10 pages BL8558 pin description pin number symbol function sot-89-3 (a) sot-89-3 (b) sot-23-5 (prn) sot-23-5 (prc) sot23-3 to-92 1 3 5 4 2 3 vout output pin 3 2 1 5 3 1 vin input pin 2 1 2 2 1 2 vss ground pin 3 1 ce chip enable pin 4 3 nc no connection product classification output voltage package type product name package type product name package type product name 1.2v sot - 89 - 3a BL8558 - 12psa sot - 89 - 3b BL8558 - 12p s b sot - 23 - 5 a BL8558 - 12prn 1.5v sot - 89 - 3a BL8558 - 15psa sot - 89 - 3b BL8558 - 15psb sot - 23 - 5 a BL8558 - 15prn 1.8 v sot - 89 - 3a BL8558 - 18p s a sot - 89 - 3b BL8558 - 18psb sot - 23 - 5 a BL8558 - 18prn 2.1v sot - 89 - 3a BL8558 - 21psa sot - 89 - 3b BL8558 - 21psb sot - 23 - 5 a BL8558 - 21prn 2.5v sot - 89 - 3a BL8558 - 25psa sot - 89 - 3b BL8558 - 25psb sot - 23 - 5 a BL8558 - 25prn 2.8v sot - 89 - 3a BL8558 - 28psa sot - 89 - 3b BL8558 - 28psb sot - 23 - 5 a BL8558 - 28prn 2.85v sot - 23 - 5 a BL8558 - 285prn 3.0v sot - 89 - 3a BL8558 - 30psa sot - 89 - 3b BL8558 - 30psb sot - 23 - 5 a BL8558 - 30prn 3.2v sot - 89 - 3a BL8558 - 32psa sot - 89 - 3b BL8558 - 32psb sot - 23 - 5 a BL8558 - 32prn 3.3v sot - 89 - 3a BL8558 - 33psa sot - 89 - 3b BL8558 - 33psb sot - 23 - 5 a BL8558 - 33prn 3.5v sot - 89 - 3a BL8558 - 35psa sot - 89 - 3b BL8558 - 35psb sot - 23 - 5 a BL8558 - 35prn 4 . 5 v sot - 89 - 3a BL8558 - 45 psa sot - 89 - 3b BL8558 - 45 psb sot - 23 - 5 a BL8558 - 45 prn output voltage package type product name package type product name package type product name 1.2v sot - 23 - 3 BL8558 - 12prm to - 92 BL8558 - 12pt sot - 23 - 5 c BL8558 - 12pr c 1.5v sot - 23 - 3 BL8558 - 15prm to - 92 BL8558 - 15pt sot - 23 - 5 c BL8558 - 15pr c 1.8v sot - 23 - 3 BL8558 - 18prm to - 92 BL8558 - 18pt sot - 23 - 5 c BL8558 - 18pr c 2.1v sot - 23 - 3 BL8558 - 21prm to - 92 BL8558 - 21pt sot - 23 - 5 c BL8558 - 21pr c 2.5v sot - 23 - 3 BL8558 - 25prm to - 92 BL8558 - 25pt sot - 23 - 5 c BL8558 - 25pr c 2.8v sot - 23 - 3 BL8558 - 28prm to - 92 BL8558 - 28pt sot - 23 - 5 c BL8558 - 28pr c 3.0v sot - 23 - 3 BL8558 - 30prm to - 92 BL8558 - 30pt sot - 23 - 5 c BL8558 - 285pr c 3.2v sot - 23 - 3 BL8558 - 32prm to - 92 BL8558 - 32pt sot - 23 - 5 c BL8558 - 30pr c 3.3v sot - 23 - 3 BL8558 - 33prm to - 92 BL8558 - 33pt sot - 23 - 5 c BL8558 - 32pr c 3.5v sot - 23 - 3 BL8558 - 35prm to - 92 BL8558 - 35pt sot - 23 - 5 c BL8558 - 33pr c 4 . 5 v sot - 23 - 3 BL8558 - 45 prm to - 92 BL8558 - 45 pt sot - 23 - 5 c BL8558 - 35pr c
http://www.belling.com.cn - 4- 8/16/2006 total 10 pages BL8558 product marking information: sot - 23 - 3 sot23 - 5 a sot - 89 - 3 (a) sot - 89 - 3 (b) to - 92 1 output voltage 2. lot no. sot23 - 5 c
http://www.belling.com.cn - 5- 8/16/2006 total 10 pages BL8558 block diagram absolute maximum ratings max input voltage --------------------------------- ------------------------------------------ 10v junction temperature (t j ) -------------------------------------------------- -------------- 125 c output current ------------------------------------ ------------------------------------------- 500ma power dissipation sot-23-5 ------------------------------------------ -------------------------------------- 250mw sot-23-3 ------------------------------------------ -------------------------------------- 200mw sot-89-3 ------------------------------------------ -------------------------------------- 500mw to-92 --------------------------------------------- --------------------------------------- 350mw storage temperature (ts) -------------------------- -------------------------------------- -45 c 150 c recommended work conditions item min recommended max unit input voltage range 8 v ambient temperature -40 85 c electrical characteristics test conditions: cin=1uf,cout=3.4uf,ta=25 c, unless otherwise specified. BL8558, for arbitrary output voltage symbol parameter conditions min typ max units vin input voltage 8 v vout output voltage vin=set vout+1v 1ma iout 30ma vout x0.98 vout1 vout x1.02 v iout (max.) maximun output current vin-vout=1v 500 ma
http://www.belling.com.cn - 6- 8/16/2006 total 10 pages BL8558 vdrop 1 dropout voltage,vout 2.8v iout=100ma 88 120 mv iout=300ma 270 350 mv iout=500ma 460 600 mv vout vin vout d d line regulation iout=40ma 2.8v vin 8v 0.05 0.2 %/v vout d / iout d load regulation vin=set vout+1v 1ma iout 500ma 20 40 mv iss supply current vin=set vout+1v 75 90 ua istandby supply current (srandby) vin=set vout+1v vce=gnd 0.1 1.0 ua vout t vout d d output voltage temperature coefficiency iout=30ma 100 ppm/ c psrr ripple rejection f=100hz, ripple=0.5vp-p vin=set vout+1v 65 db ilim short current limit vout=0v 200 ma rpd ce pull down resistance 2.0 5.0 10.0 m w vceh ce input voltage h 1.5 vin v vcel ce input voltage l 0 0.25 v en output noise bw=10hz~100khz 47 uvrms 1. vdrop=vin1-(vout2*0.98) vout2 is the output voltage when vin=vout1+1.0v and iout=300ma or iout=500ma. vin1 i s the input voltage at which the output voltage becom es 98% of vout1 after gradually decreasing the input voltage. typical application circuit explanation BL8558 series is a group of positive voltage output , low noise, low power consumption, low dropout voltage regulator. BL8558 can provide outpu t value in the range of 1.2v~4.5v every 0.1v step. it also can be customized on command. BL8558 includes high accuracy voltage reference , error amplifier, current limit circuit and output driver module. BL8558 has excellent load and line t ransient response and good temperature characteristics, which can assure the stability of chip and power system. and it uses trimming technique to guarantee output voltage accuracy with in 2%. application hints note1: input capacitor (cin=1uf) is recommended in all application circuit. note2: output capacitor (cout=3.3uf/4.7uf) is recommended in all application to assure the stability of circuit. BL8558
http://www.belling.com.cn - 7- 8/16/2006 total 10 pages BL8558 typical performance characteristics 1) output voltage vs. output current (with output short protection) 2) output voltage vs. input voltage 0 0.5 1 1.5 2 2.5 3 0 200 400 600 800 1000 1200 iload(ma) vout(v) vin=3.3v vin=3.8v vin=4.8v 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 2 4 6 8 10 vin(v) vout(v) iload=0 iload=28ma 3) dropout voltage vs. output current 4) ripple rej ection vs. frequency 0 10 20 30 40 50 60 70 80 90 0.01 0.1 1 10 100 freq(khz) psrr(db) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 100 200 300 400 500 600 iload(ma) dropout(v) vout=2.8v vout=1.8v
http://www.belling.com.cn - 8- 8/16/2006 total 10 pages BL8558 5) line transient response iout=1ma cout=1uf iout=50ma cout=1uf 6) load transient response vin=4.6v cou t=1uf vin=4.6v cout=4.7uf vin=5.8v cout=1uf vin=5.8v cout=1uf 5v 4v 5v 4v input voltage output voltage input voltage output voltage 50ma 1ma output current output voltage 50ma 1ma output current output voltage 250ma 1ma output current output voltage 60ma 1ma output current output voltage
http://www.belling.com.cn - 9- 8/16/2006 total 10 pages BL8558 7) startup response 8) shutdown response en voltage output voltage en voltage output voltage
http://www.belling.com.cn - 10- 8/16/2006 total 10 pages BL8558 package information: package sot-23-5 devices per reel 3000 unit mm package specification taping specification: reel specification:
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