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www. belling .com .cn 1 1a bipolar linear regulator bl 1117 description bl 1117 is a series of low dropout three - terminal regulators with a dropout of 1. 3 v at 1a load current. bl 1117 features a very low standby current 2ma compared to 5ma of competitor. other than a fixed version , vout = 1.2v, 1.5v, 1.8v, 2.5v, 3 .3v, 5v , and 12v , bl 1117 has an adjustable version, which can provide an output voltage from 1.25 to 12 v with only two external resistors . bl 1117 offers thermal shut down and current limit functions, to assure the stability of chip and power system. and i t uses trimming technique to guarantee output voltage accuracy within ? 2% . other output voltage accuracy can be customized on de m and, such as ? 1 % bl 1117 is available in sot - 223, to - 252 power package . features ? other than a fixed version and an adjustable version, output value can be customized on de mand. ? maximum output current is 1a ? range of operation input voltage: max 12 v ? standby current: 2ma (typ.) ? line regulation: 0. 1 %/v (typ.) ? load regulation: 10mv (typ.) ? environment temperature: - 4 0 ? c ~85 ? c applic ations ? power management for computer mother board, graphic card ? bl d monitor and bl d tv ? dvd decode board ? adsl modem ? post regulators for switching supplies typical application application circuit of bl 1117 fixed version note: input capacitor (cin=10uf) and output capacitor (cout= 10 uf) are recommended in all application circuit. tantalum or mlcc capacitor is recommended. typical electrical characteristic bl1117 bl1117 v i n v o u t g n d 1 0 u f 1 0 u f v i n v o u t l c 1 1 1 7
www.belling.com.cn 2 bl 1117 ordering information bl1117 - xx x x absolute maximum rating pin configuration pin description fixed version adjustable version note: exceed these limits to damage to the device. exposure to absolute maximum rating conditions may affect device reliability. r ecommended work conditions parameter value input voltage range max. 12v ? operating j unction t emperature(tj) - 2 0 ? c C 125 ? c ? exceptional for bl 1117 - 12v, the maximum input voltage for bl 1117 - 12v is 20v. pin no. symbol definition 1 gnd ground 2 vout output 3 vin input pin no. symbol definition 1 adj. adjustable 2 vout output 3 vin input parameter value max input voltage 15v ? max operating junction temperature(tj) + 150 ? c ambient temperature(ta) - 40 ? c C 85 ? c package thermal resistance sot - 223 20 ? c / w to - 252 1 0 ? c / w storage temperature(ts) - 40 ? c - 150 ? c lead temperature & time 260 ? c , 10s package type x sot - 223 y to - 252 temp. range & rohs std. a 85 c & pb - free rhos std,output voltage accuracy within ? 1 c 85 c & pb - free rohs std,output voltage accuracy within ? 2 output voltage 12 1.2v 1 5 1. 5 v 18 1.8v 25 2.5v 33 3.3v 50 5.0v default adjustable version a means assembly year and weeks year 2010 2011 2012 2013 y 0 1 2 3 week 1 2 26 27 52 53 w a b z a b means manufacture lot no. c means output voltage value d means temp. range&rohs std
www.belling.com.cn 3 bl 1117 electrical characteristics + tj=25 ? c symbol parameter conditions min typ max unit vref reference voltage bl 1117 - adj 1.225 1.25 1.275 v 10maiout1a , vin=3.25v vout output voltage bl 1117 - 1.2v 1.176 1.2 1.224 v 0iout1a , vin=3.2v bl1117 - 1. 5 v 0iout1a , vin=3. 5 v 1.47 1.5 1.53 v bl 1117 - 1.8v 1.764 1.8 1.836 v 0iout1a , vin=3.8v bl 1117 - 2.5v 2.45 2.5 2.55 v 0iout1a , vin=4.5v bl 1117 - 3.3v 3.234 3.3 3.366 v 0iout1a , vin=5.3v bl 1117 - 5.0v 4.9 5 5.1 v 0iout1a , vin=7.0v bl 1117 - 12.0v 11.76 12 12.24 v 0iout1a , vin=14v vout line regulation bl 1117 - 1.2v 0.1 0.2 % /v iout=10ma, 2.7v vin 10v bl 1117 - adj 0.1 0.2 %/v iout=10ma, 2.75v vin 12v bl1117 - 1. 5 v out=10ma, 3. 0 v vin 12v 0.1 0.2 %/v bl 1117 - 1.8v 0.1 0.2 %/v iout=10ma, 3.3v vin 12v bl 1117 - 2.5v 0.1 0.2 %/v iout=10ma, 4.0v vin 12v bl 1117 - 3.3v 0.1 0.2 %/v iout=10ma, 4.8v vin 12v bl 1117 - 5.0v 0.1 0.2 %/v iout=10ma, 6.5v vin 12v bl 1117 - 12.0v 0.1 0.2 + %/v iout=10ma, 13.5v vin 20v vout load regulation bl 1117 - 1.2v 10 30 mv vin =2.7v, 10ma iout 1a bl 1117 - adj 10 30 mv vin =2.75v, 10ma iout 1a bl1117 - 1. 5 v vin=3. 0 v, 10ma iout 1a 10 30 mv bl 1117 - 1.8v 10 30 mv vin=3.3v, 10ma iout 1a bl 1117 - 2.5v 10 30 mv vin=4.0v, 10ma iout 1a bl 1117 - 3.3v 10 30 mv vin=4.8v, 1 0ma iout 1a bl 1117 - 5.0v 10 30 mv vin=6.5v, 10ma iout 1a bl 1117 - 12.0v 10 30 mv vin=13.5v, 10ma iout 1a
www.belling.com.cn 4 bl 1117 electrical characteristics continued + tj=25 ? c symbol parameter conditions min typ max unit vdrop dropout voltage iout=10 0ma 1.23 1.3 v iout=1a 1.3 1.5 v ilimit current limit vin - vout=2v, tj=25c 1 a svr supply voltage rejection f = 120hz, vin ? vout = 3v + 1vpp ripple 60 db imin minimum load current bl 1117 - adj 4 6 10 ma iq quiescent current bl 1117 - 1.2v, vi n =10v 1 2 5 ma bl1117 - 1. 5 v, vin =1 1 v 1 2 5 ma bl 1117 - 1.8v, vin =12v 1 2 5 ma bl 1117 - 2.5v,vin =12v 1 2 5 ma bl 1117 - 3.3v, vin =12v 1 2 5 ma bl 1117 - 5.0v, vin =12v 1 2 5 ma bl 1117 - 12.0v, vin =20v 1 2 5 ma iadj adjust pin current bl 11 17 - adj 35 55 120 ua vin =5v, 10ma iout 1a ichange iadj change bl 1117 - adj 0.2 10 ua vin =5v, 10ma iout 1a v/t temperature coefficient 100 ppm ? jc thermal resistance sot - 223 20 c/w to - 252 10 to - 220 4.5 ? j a th ermal resistance junction - to - ambient (no air flow) sot - 223 (no heat sink) 136 c/w to - 252 (no heat sink) 92 note1: all test are conducted under ambient temperature 25 c and within a short period of time 20ms note2: load current smaller than minimum load current of bl 1117 - adj will lead to unstable or oscillation output.
www.belling.com.cn 5 bl 1117 block diagram detailed description bl 1117 is a series of low dropout voltage, three terminal regulators. its application circuit is very simple: the f ixed version only needs two capacitors and the adjustable version only needs two resistors and two capacitors to work. it is composed of some modules including start - up circuit, bias circuit, bandgap, thermal shutdown, current limit, power transistors and its driver circuit and so on. the thermal shut down modules can assure chip and its application system working safety when the junction temperature is larger than 140 c . the bandgap module provides stable reference voltage, whose temperature coefficie nt is compensated by careful design considerations. the temperature coefficient is under 100 ppm/ c . and the accuracy of output voltage is g uaranteed by trimming technique. typical application bl 1117 has an adjustable version and six fixed versions (1. 2v, 1. 5 v, 1.8v, 2.5v, 3.3v, 5v and 12v) fixed output v oltage version application circuit of bl 1117 fixed version 1) recommend using 10uf tan capacitor or mlcc capacitor as bypass capacitor (c1) for all application circuit. 2) recommend using 10 uf tan capacitor mlcc capacitor to assure circuit stability. 3) capacitor esr range: 3 m ~ 22 adjustable output voltage version bl1117 v i n v o u t g n d 1 0 u f 1 0 u f v i n v o u t l c 1 1 1 7
www.belling.com.cn 6 bl 1117 bl 1117 - adj provide s a 1 .25v reference v oltage. any output voltage between 1.25v~ 12 v can be achievable by cho osing two exter nal resistors (schematic is shown below) , r1 and r2 application circuit of bl 1117 - adj the output voltage of adjustable version follows t he equation: v o ut = 1.25 ? (1+r2/r1)+i adj ? r2. we can ignore + i adj because i a dj (about 50ua) is much less than the current of r1 (about 2~10 ma). 1) to meet the minimum load current (>10ma) requirement, r1 is recommended to be 125ohm or lower. as bl 1117 - adj can keep itself stable at load current about 2ma, r1 is not allowed to be hig her than 625ohm. 2) using a bypass capacitor ( c adj ) between the adj pin and ground can imp rove ripple rejection . this bypass capacitor prevents ripple from being amplified as the output voltage is increased. the impedance of c adj should be less than r1 to pr event ripple from being amplif ied . as r1 is normally in the range of 1 00~ 50 0, the value of c adj should satisfy this equation: 1/(2 ? ? f ripple ? c adj ) www.belling.com.cn 7 bl 1117 typical performance characteristics t=25 c unless specified. line regulation load regulation dropout voltage thermal performance with otp bl1117 bl1117 bl1 117 bl1117 0 0.3 0.6 0.9 1.2 1.5 0 2 4 6 8 10 12 14 vout(v) vin (v) lc1117 - adj vout vs. vin 0 0.3 0.6 0.9 1.2 1.5 0 0.2 0.4 0.6 0.8 1 1.2 vout(v) iout (a) lc1117 - adj vout vs. iout 0 0.3 0.6 0.9 1.2 1.5 0 0.2 0.4 0.6 0.8 1 1.2 dropout voltage (v) iout (a) lc1117 - adj dropout vs. iout 0 0.3 0.6 0.9 1.2 1.5 - 50 0 50 100 150 200 vout(v) temperature ( ? c) lc1117 - adj vout vs. temp
www.belling.com.cn 8 bl 1117 a pplication note load transient response test condition: v in =5v, v out= 3.3v, c in =1uf (cer amic), c out =10uf (ceramic ) . i : iout=10ma~ 1 00ma ch 2 : output voltage ( 500 mv/div, d c), ch4: output current( 5 0ma/div)
www.belling.com.cn 9 bl 1117 i : iout=10ma~ 2 00ma ch 2 : output voltage ( 500 mv/div, d c), ch4: output current( 5 0ma/div) i : iout=10ma~ 5 00ma ch 2 : output voltage ( 500 mv/div, d c), ch4: output current( 20 0ma/div)
www.belling.com.cn 10 bl 1117 i : iout=10ma~ 8 00ma ch 2 : output voltage ( 500 mv/div, d c), ch4: output current( 20 0ma/div) load transient response test condition: v in = 3.3 v, v out= adj , c in =1uf (ceramic), c out =10uf ( ceramic ) . i : iout=10ma~ 1 00ma ch 2 : output voltage ( 2 00 mv/div, d c), ch4: output current ( 5 0ma/div)
www.belling.com.cn 11 bl 1117 i : iout=10ma~ 2 00ma ch 2 : output voltage ( 200 mv/div, d c), ch4: output current( 5 0ma/div) i : iout=10ma~ 5 00ma ch 2 : output voltage ( 200 mv/div , d c), ch4: output current( 20 0ma/div)
www.belling.com.cn 12 bl 1117 i : iout=10ma~ 8 00ma ch 2 : output voltage ( 200 mv/div, d c), ch4: output current( 20 0ma/div)
www.belling.com.cn 13 bl 1117 package out line package sot - 223 devices per reel 2500 unit mm package specification min nom max. a 1.50 1.65 1.80 a1 0.02 0.06 0.10 a2 1.45 1.60 1.75 a3 0.80 0.90 1.00 b 0.67 - 0.80 b1 0.66 0.71 0.75 b2 2.96 - 3.09 b3 2.95 3.00 3.05 c 0.30 - 0.35 c1 0.29 0.30 0.31 d 6.35 - 7.05 d1 6.30 6.50 6.70 e 6.80 7.00 7.20 e1 3.40 3.50 3.60 e 2.30bsc e1 4.60bsc l 0.80 1.00 1.20 l1 1.75ref l2 0.25bsc 0 - 8 1 10 12 14 taping dimension m1 standard type m2 customized
www.belling.com.cn 14 bl 1117 taping reel dimension package to - 252 devices per reel 2500 unit mm package specification
www.belling.com.cn 15 bl 1117 taping dimension m1 standard type m2 customized taping reel dimension

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