www. belling .com .cn 1 2a low consumption linear regulator bl8072 description bl8072 is a series of low power consumption, low dropout voltage regulator with a typical dropout voltage of 1 .0 v at 2 a load current. bl8072 can provide output value in the range of 1. 2 v~5.0v in 0.1v steps. it also can customized on command. other than every voltage version can be used as an adjustable voltage version , with which d esired voltage can be achieved by setting the values of two external resistors of the application circuitry. bl8072 has well load transient response and good temperature characteristic, and it uses trimming technique to guarantee output voltage accuracy w ithin 2%. bl8072 serie s is available in standard packages of sot - 223 and to - 252 . features ? low power consumption: 3 .0ua ( typ. ) ? maximum output current : 2 a ? maximum input voltage: 18 v ? line regulation: 0.2 % (typical) ? output voltage range:1. 2 v~5. 0 v (customized on command in 0.1v steps) ? highly accurate:2%(1% customized ) ? typical dropout voltage : 850 mv@ 1.5 a (vout= 3.3 v) ? operation e nvironment temperature: - 40 ~ 8 5 applications ? battery charger ? battery powered equipment ? post regulators for switching supplies ? reference voltage source regulation after switching powe r typical application fig1. bl8072 fixed voltage a pplication circuit n ote : input capacitor (c in =1 uf) and output capacitor (c out = 1 uf) are recommended in all application circuit. c eramic capacitor is recommended. electrical characteristics 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.0 0.5 1.0 1.5 2.0 dropout (v) iout(a) dropout vout=1.2v vout=3.3v vout=5.0v bl8072 g n d v o u t v i n c o u t c i n v o u t v i n l c 1 2 2 2
www.belling.com.cn 2 bl8072 ordering information bl8072 1 2 3 4 5 code description 1 temperature&rohs: c: - 40 ~8 5 ? c , pb free rohs std. 2 package type: l : sot - 2 23 o:to - 252 3 packing type: tr: tape&reel (standard) 4 output voltage: e.g. 18=1.8v 33=3.3v 50=5.0v 5 voltage accuracy: blank(default) : 2% 1: 1 % absolute maximum rating parameter value max input voltage 2 0 v operating junction temperature(tj) 1 25 ? c ambient temperature(ta) - 40 ? c C 8 5 ? c package thermal resistance sot - 223 20 ? c / w to - 2 52 12 ? c / w storage temperature(ts) - 40 ? c - 150 ? c lead temperature & time 260 ? c ,10s note: exceed these limits to damage to the device. exposure to absolute maximum rating conditions may affect device reliability. recommended work conditions parameter value input voltage range max. 18 v ambient temperature - 40 ? c C 8 5 ? c pin configuration product classification bl8072 c l tr j j : product code xx: output voltage ll : lot no. y y ww : date code product classification bl8072 c o tr j j : product code to - 252 xx: output voltage ll : lot no. y y ww : date code xx: output voltage code, e.g. 12 =1.2v, 25=2.5v, 33=3.3v; y y: the year of manufacturing, 1 1 stands for year 2 0 11 , 1 2 stands for year 201 2 , and 2 8 stands for year20 2 8. ww : the week of manufacturing. 01 stands for week 1, 02 stands for week 02 , 52 stands for week 52 .
www.belling.com.cn 3 bl8072 electrical characteristics (test conditions: cin=1uf, cout=1uf, ta=25 ? c, unless otherwise specified) symbol parameter conditions min typ max unit vin input voltage 18 v vout output voltage vout x0.98 vout x1.02 v iout(max.) maximum output current vin - vout=1 . 9 v vout <1.5v 2 a vin - vout=1 . 5 v 1.5v ? vout<2.0v vin - vout=1v vout 2.0v dropout voltage input - output voltage differential (note 3) iout ? 1.5a vout <1.5v 1600 1 8 00 mv 1.5v ? vout<2.0v 1 2 00 1 4 00 vout 2.0v 8 5 0 950 line regulation (note 1) iout=10ma set vout+1v vin 18 v 0.1 0.3 %/v load regulation (note 1,2) 1ma iout 1.5a vout <1.5v 40 60 mv 1.5v ? vout<2.0v 20 40 vout 2.0v 10 30 iq quiescent current vin=set vout+1v 3.0 5.0 ua output voltage temperature coefficient iout=100ma 20 0 ppm/ ? c thermal resistance junction to case sot - 2 23 to - 2 52 20 12 ? c / w note1: line regulation and load regulation in table1 are tested under constant junction temperature. note2: when load current varies between 0~ 2 a and vin - vout ranges from 1 v~ 1 8 v at constant junction temperature , the parameter is satisfied the criterion in table. note3: dropout voltage is the voltage difference between the input and output pin when the input voltage is minimum to maintain the lowest spec output voltage. block diagram ? vout vin vout ? ? ? vout ? vout t vout ? ? ? jc ?
www.belling.com.cn 4 bl8072 detailed description bl8072 is a series of low dropout voltage and low power consumption regulator. its application circuitry requires minimum number of external components. both fixed voltag e and adjustable voltage application circuit s need input and output capacitors to assure output voltage stability. any desired output voltage from fixed voltage to 1 8 v can be achieved by assigning proper values to two external resistors in its application circuitry (as shown in fig. 3 , as r1, r2 are the two external resistors.). bl8072 uses trimming technique to assure the accuracy of output value within 2%, at the same time, temperature compensation is elaborately considered in this chip, which makes bl8072 s temperature coefficient within 100ppm/ typical application bl8072 has fixed voltage and adjustable voltage application mode , fig.4 shows their typical application circuitry. a 1 uf c eramic capacitor connected between input and gnd as bypass capacitor and a 1 uf c eramic capacitor between output and gnd are recommended for all application. using a bypass capacitor (c adj ) between the adjust terminal and ground can improve ripple rejection. the bypass capacitor prevents ripple from being amplified in case the output voltage is increased. the impedance of c adj should be less than the resistance of r 1 to prevent ripple from being amplified at any frequency. as r1 is normally in the range of 1k ~ 1 0 k , the value of c adj should satisfy the following condition: 1/(2 ? * frequency ripple *c adj )< r 1 a 0.1 f c eramic capacitor is recommended . fig 3 . typical application of bl8072 e xplanation the outp ut voltage of adjustable application satisfies this followed equation: v o ut =v ref (1+r 2 /r 1 )+i adj r 2 . the second term i adj r 2 can be ignored since the adjustable pin current i adj ( ~ 2 a) is much less than the current through r 1 ( ~1m a). the value of r 1 is preferred in the range of 1 k 10 k and the value of v ref is the out put voltage of typical fixed voltage a pplication circuit .
www.belling.com.cn 5 bl8072 typical performance characteristics 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0.0 0.5 1.0 1.5 2.0 vout (v) iout(a) load regulaion (vout=1.2v) vin=3v vin=4v vin=5v vin=10v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0.0 0.5 1.0 1.5 2.0 vout (v) iout(a) load regulaion (vout=3.3v) vin=4.3v vin=5v vin=6v vin=10v 0 1 2 3 4 5 6 0.0 0.5 1.0 1.5 2.0 vout (v) iout(a) load regulaion (vout=5.0v) vin=6v vin=7v vin=8v vin=10v 0 1 2 3 4 5 6 0 3 6 9 12 15 18 vout (v) vin(v) line regulaion vout=1.2v vout=1.8v vout=3.3v vout=5.0v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.0 0.5 1.0 1.5 2.0 dropout (v) iout(a) dropout vout=1.2v vout=3.3v vout=5.0v 0 2 4 6 8 10 12 14 16 0 3 6 9 12 15 18 iq (ua) vin (v) iq
www.belling.com.cn 6 bl8072 line transient response load transient response iout=1 0 0ma,v in = 3 .3 v to 4 .3 v vin= 3.3 v, iout=0.1a to 1a ( orange : vin , green : vout) ( pink : iout, green : vout) package line package to - 252 devices per reel 2500 unit mm package specification
www.belling.com.cn 7 bl8072 package sot - 223 devices per reel 2500 unit mm package specification
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