www. belling .com .cn 1 1.5a linear regulator bl8071 general description bl8071 series are a group of positive voltage output , high precise , and low power consumption voltage regulator . voltages are selectable in 100mv steps within a range of 1.2 v to 5.0 v. it also can be customized on command. bl8071 series have excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and p ower system. and it uses trimming technique to guarantee output voltage accuracy within 2%. bl8071 series are available in sot - 223 package, which are lead ( pb) - free. features ? low quiescent current: 100 ua at 5v ? high psrr: 7 0db range to 1khz ? low output noise: 44uvrms ? low dropout: 30 0mv at 1a load ? maximum output current: 1 .5 a ? highly accurate: 2% ? low esr c eramic c apacitor c ompatible applications ? reference voltage source ? battery powered equipment ? pc peripherals ? wireless devices ? instrumentation typical application block diagram bl8 071 v d d v o u t g n d i n o u t c o u t c i n l c 1 4 5 9
www. belling .com .cn 2 bl8071 ordering information bl8071 1 2 3 4 5 code description 1 temperature&rohs: c: - 40~85 ? c ,pb free rohs std. 2 package type: l a : sot - 223 (a) l b : sot - 223 (b) 3 packing type: tr:tape&reel (standard) 4 output voltage: e.g. 12=1.2v 18=1.8v 25=2.5v 33=3.3v 50=5.0v 5 voltage accuracy: 1= 1%(customized) blank(default)= 2% absolute maximum rating parameter value max input voltage 8v max operating junction temperature (t j ) 1 4 5 ? c ambient temperature (t a ) - 40 ? c ~85 ? c package thermal resistance sot - 223 20 ? c / w storage temperature (t s ) - 40 ? c ~150 ? c lead temperature & time 260 ? c , 10 sec pin configuration product classification bl8071 cl a tr jbxx llbyw jb :product code xx:output voltage a: a type ll:lot no. b:fab code yw:date code product classification bl8071 clb tr jbxx llbyw jb :product code xx:output voltage b: b type ll:lot no. b:fab code yw:date code vdd supply voltage input gnd ground pin v out output voltage y: the year of manufacturing, 1 stands for year 20 11 , 2 stands for year 201 2 , and 8 stands for year 201 8 . w: the week of manufacturing. a stands for week 1,z stands for week 26, stands for week 27, stands for week 52. recommended work conditions parameter value input voltage range max. 6v ambient temperature - 40 ? c ~85 ? c operating junction temperature (t j ) 1 2 5 ? c a z
www. belling .com .cn 3 bl8071 electrical characteristics test conditions: c in = 4.7 uf,c out = 4.7 uf,t a =25 ? c, unless otherwise specified. symbol parameter conditions min typ max units v dd input voltage 1. 5* 6 v v out output voltage v out >1.5 v dd =set v out +1v 1mai out 10ma v out x0.98 v out v out x1.02 v v out <=1.5 v out - 0.03 v out +0.03 i out (max.) ** maximum output current v dd - v out =1v 1 .5 a v drop dropout voltage v out =3.3v, i out =1a 30 0 50 0 mv line regulation i out =10ma , 4vv dd 6v 0.05 0.2 %/v load regulation v dd =set v out +1v 1mai out 2.5a 30 60 mv is supply current v dd =set v out +1v , v out floating 100 1 50 ua output voltage temperature coefficient i out =10ma 100 ppm/ ? c psrr ripple rejection f=100hz, ripple=0.5vp - p, v dd =set v out +1v 70 db en output noise bw=10hz~100khz 44 uvrms note: *iout =500ma@vout=1.2v ** the maximum power rating of each package is a constant, so along with the change of i load , the v dd - v out should be controlled to a certain range to ensure the normal operation. thermal considerations we have to take heat dissipation into great consideration when output current or differential voltage of input and output voltage is large. because in such cases, the power dissipation consumed by bl8071 is very large. bl8071 series uses sot - 223 package ty pe and its thermal resistance is about 20 c /w. and the copper area of application board can affect the total thermal resistance. if copper area is 5cm*5cm ( two sides ) , the resistance is about 30 c /w. so the total thermal resistance is about 20 c /w + 30 c / w. in this case, the power dissipation should be limited less than 1.2w. we can decrease total thermal resis tance by increasing copper area in application board. when there is no good heat dissipation copper are in pcb, the total thermal resistance will be as high as 120 c /w, then the power dissipation of bl8071 could allow on itself is less than 1w. and furthermore, bl8071 will work at junction temperature higher than 125 c under such condition and no lifetime is guaranteed. current limit mode current limit module can keep chip and power system away from danger when load current is too large . when vout decrease the short c ircuit current will fold back to a small value . vout vin vout ? ? ? vout ? vout t vout ? ? ?
www. belling .com .cn 4 bl8071 typical performance characteristics 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 0.0 0.5 1.0 1.5 vout(v) iout(a) load regulation (vout=3.3v) vin=5.0v vin=4.3v vin=4.0v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0.0 0.5 1.0 1.5 vout(v) iout(a) load regulation (vout=1.2v) vin=5.0v vin=3.0v vin=2.0v vin=1.8v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 1 2 3 4 5 6 vout(v) vin(v) line regulation vout=3.3v vout=1.2v 0 50 100 150 200 250 0 1 2 3 4 5 6 iq(ua) vin(v) iq vout=3.3v vout=1.2v 0 100 200 300 400 500 600 700 800 900 0 0.5 1 1.5 dropout(mv) iout(a) dropout voltage vout=3.3v vout=1.2v 2.0 2.5 3.0 3.5 4.0 (50) 0 50 100 150 vout(v) temperature( ) vout vs. temperature
www. belling .com .cn 5 bl8071 load transient response (vin=5v,vout=3.3v) line transient response(vin=5v,vout=3.3v) cin=1uf,cout=1uf,iout=1ma - 100ma cin=1uf,cout=1uf,iout=10ma,vin=4.3v - 5.3v package line package sot - 223 devices per reel 2500 pcs unit mm package specification e e1 e e l1 l1 l l2 c c d d c1 c b1 b section d-d b2 c1 c b3 section c-c 6.53 6.48 6.58 d 0 - 8 r1 0.10 - - l1 1.75ref 1.20 1.00 0.80 l e 2.30bsc - 6.80 7.20 e c1 0.31 0.29 0.30 - 0.30 0.35 c b1 0.76 0.66 0.71 - 0.67 0.80 b a3 1.00 0.80 0.90 1.60 - - 1.50 1.70 a2 a1 0.10 0.02 - 1.80 a max nom min symbol (units of measure=millimeter) common dimensions 3.40 3.50 3.60 e1 e1 4.60bsc l2 0.25bsc r - 0.10 - 14 12 10 d(top) a3 a2 a a1 r r b3 3.05 2.95 3.00 - 2.96 3.09 b2 all dimensions refer to jedec standard to261-aa notes: e1(btm) e2(top) d1(btm) 6.60 6.55 6.65 d1 3.33 3.43 3.53 e2 0.10 0.08 d2 - - 7.05 d2
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