ace1117c 1a bipolar linear regulator ver 1. 3 1 d escription ace1117c is a series of low dropout three - terminal regulators with a dropout of 1. 3 v at 1a load current. ace1117c features a very low standby current 2ma compared to 5ma of competitor. other than a fixed version vout 1.2v,1.8v,2.5v,2.85v,3.3v ,5v and 12v , ace1117c has an adjustable version, which can provide an output voltage from 1.25 to 1 2 v with only two external resistors. ace1117c 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 command, such as 1%. features other than a fixed version and an adjustable version, ou t put value can be customized on command. maximum output current is 1a. range of operation in p ut voltage: max 1 2 v standby current: 2ma (typ.) line regulation: 0. 1 % (typ.) load regulation: 1 0 mv (typ.) environment temperature: - 2 0 ~85 compatible with tantalum capacitor, electrolytic capacitor application power management for computer mother board, graphic card lcd monitor and lcd tv dvd decode board adsl modem post regulators for switching supplies absolute maximum ratings parameter symbol max unit input voltage v in 15 v operating j unction t emperature t j 150 o c ambient temperature t a - 40~85 o c package thermal resistance sot - 223 20 o c /w to - 252 12.5 storage temperatur e t s - 40 to 150 o c note: exceed these limits to damage to the device. exposure to absolute maximum rating conditions may affect device reliabili ty.
ace1117c 1a bipolar linear regulator ver 1.3 2 typical e lectrical characteristics ace1117c - adj vout vs. temp te mperature ( ) typical application application circuit of ace1117c fixed version ace1117c packaging type sot - 223 to - 252 1 2 3 1 2 3 sot - 223 / to - 252 description 1 adj/ gnd 2 vout 3 vin
ace1117c 1a bipolar linear regulator ver 1.3 3 ordering information ace1117c xx xx + h electrical characteristics parameter symbol test conditions min typ m um u nit output voltage vout ace1117c - 1.2v 0 Q iout Q 1a, vin=3.2v 1.176 1.20 1.224 v ace1117c - 1.8v 0 Q iout Q 1a, vin=3.8v 1.764 1.80 1.836 ace1117c - 2.5v 0 Q iout Q 1a, vin=4.5v 2.45 2.5 2.55 ace1117c - 3.3v 0 Q iout Q 1a, vin=5.3v 3.234 3.3 3.366 ace1117c - 5.0v 0 Q iout Q 1a, vin=7.0v 4.9 5 5.1 ace111 7c - 12.0v 0 Q iout Q 1a, vin=14v 11.76 12 12.24 reference voltage v ref ace1117c - adj 10ma Q iout Q 1a, vin=3.25v 1.225 1.25 1.275 v line regulation vout ace1117c - adj iout=10ma, 2.75 v Q vin Q 12 v 0.1 0.2 %/v ace1117c - 1.2v iout=10ma, 2.7 v Q vin Q 10 v 0.1 0.2 ace 1117c - 1.8v iout=10ma, 3.3v Q vin Q 12v 0.1 0.2 ace1117c - 2.5v iout=10ma, 4.0v Q vin Q 12v 0.1 0.2 ace1117c - 3.3v iout=10ma, 4.8v Q vin Q 12v 0.1 0.2 ace1117c - 5.0v iout=10ma, 6.5v Q vin Q 12v 0.1 0.2 ace1117c - 12.0v iout=10ma, 13.5v Q vin Q 20v 0.1 0.2 halogen - free output voltage : 1.2 / 1.8 v .. / default: adjustable version pb - free xm : sot - 223 ym : to - 252
ace1117c 1a bipolar linear regulator ver 1.3 4 load regulation vout ace1117c - adj vin = 2.75 v, 10ma Q iout Q 1a 10 30 mv ace1117c - 1.2v vin=2.7v, 10ma Q iout Q 1a 10 30 ace1117c - 1.8v vin=3.3v, 10ma Q iout Q 1a 10 30 ace1117c - 2.5v vin=4.0v, 10ma Q iout Q 1a 10 30 ace1117c - 3.3v vin=4.8v, 10ma Q iout Q 1a 10 30 ace1117c - 5.0v vin=6.5v, 10ma Q iout Q 1a 10 30 ace1117c - 12.0v vin=13.5v, 10ma Q iout Q 1a 10 30 quiescent current i q ace1117c - 1.2v, vin= 10 v 2 5 ma ace1117c - 1.8v, vin=12v 2 5 ace1117c - 2.5v, vin=12v 2 5 ace1117c - 3.3v, vin=12v 2 5 ace11 17c - 5.0v, vin=12v 2 5 ace1117c - 12.0v, vin=20v 2 5 adjust pin current i adj ace1117c - adj vin=5v, 10ma Q iout Q 1a 55 120 ua iadj change ichange ace1117c - adj vin=5v, 10ma Q iout Q 1a 0.2 10 ua current limit llimit vin - vout=2v, t j =25 1 a minimum load current lmin ace1117c - adj 2 10 ma temperature coefficient v/ t 100 ppm vdrop dropout voltage iout=100ma 1.23 1.3 v iout=1a 1.3 1.5 v thermal resist ance jc sot - 223 20 /w to - 252 10 note1: all test are conducted under ambient temper ature 25c and within a short period of time 20ms note2: load current smaller than minimum load current of ace1117c - adj will lead to unstable or oscillation output.
ace1117c 1a bipolar linear regulator ver 1.3 5 block diagram detailed description ace1117c is a series of low dropout voltage, three terminal regulators. its application circuit is very simple: the fixed version only needs two capacitors and the adjustable version only needs two resistors and t wo 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 1 40 . the bandgap module provides stable reference voltage, whose temperature coefficient is compensated by careful design considerations. the temperature coefficient is under 100ppm/ . and the accuracy of output voltage is guaranteed by trimming technique.
ace1117c 1a bipolar linear regulator ver 1.3 6 typical application ace1117c has an adjustable version and six fixed versions (1.2v, 1.8v, 2.5v, 3.3v, 5.0v and 12v) fixed output voltage version ace1117c application circuit of ace1117c fixed version 1. re commend using 10uf tan capacitor as bypass capacitor (c1) for all application circuit. 2. recommend using 10uf tan capacitor to assure circuit stability. adjustable output voltage version ace1117c provides a 1.25v reference voltage. any output voltage betwee n 1.25v~12v can be achievable by choosing two external resistors (schematic is shown below), r1 and r2 ace1117c - adj application circuit of ace1117c - adj the output voltage of adjustable version follows the equation: vout=1.25 * (1+r2/r1)+iadj * r2. we can ignore iadj because iadj (about 50ua) is much less than the current of r1 (about 2~10ma). 1. to meet the minimum load current (>10ma) requirement, r1 is recommended to be 125ohm or lower. as ace1117c - adj can keep itself stable at load current about 2ma, r1 is not allowed to be higher than 625 . 2. using a bypass capacitor (c adj ) between the adj pin and ground can improve ripple rejection. this bypass capacitor prevents ripple from being amplified as the output voltage is increased. the impedance of c adj sh ould be less than r1 to prevent ripple from being amplified. as r1 is normally in the range of 100~500, the value of c adj should satisfy this equation: 1/(2 * ripple * c adj ) ace1117c 1a bipolar linear regulator ver 1.3 7 thermal considerations we have to take heat d issipation 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 ace1117c is very large. ace1117c series uses sot - 223 package type and its thermal resistance is about 20c/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 30c/w. so the total thermal resistance is about 20c/w + 30c/w. we can decrease total thermal resistance 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 120c/w, then the power dissipation of ace1117c could allow on itself is les s than 1w. and furthermore, ace1117c will work at junction temperature higher than 125c under such condition and no lifetime is guaranteed. typical performance characteristic line regulation ace1117c - adj vout vs. vin vin(v) load regulation ace1117c - adj vout vs. iout iout(a)
ace1117c 1a bipolar linear regulator ver 1.3 8 dropout voltage ace1117c - adj dropout vs. iout iout(a) thermal performance with otp ace1117c - adj vout vs. temp temperature( )
ace1117c 1a bipolar linear regulator ver 1.3 9 packing information sot - 223 units of measure=millimeter symbol min nom max a - - 1.80 a1 0.02 - 0.10 a2 1.50 1.60 1.70 a3 0.80 0.90 1.00 b 0.67 - 0.80 b1 0.66 0.71 0.76 b2 2.96 - 3.09 b3 2.95 3.00 3.0 5 c 0.30 - 0.35 c1 0.29 0.30 0.31 d 6.48 6.53 6.58 d1 6.55 6.60 6.65 d2 - - 7.05 e 6.80 - 7.20 e1 3.40 3.50 3.60 e2 3.33 3.43 3.53 e 2.30bsc e1 4.60bsc l 0.8 1.00 1.20 l1 1.75ref l2 0.25bsc r 0.10 - - r1 0.10 - - 1
ace1117c 1a bipolar linear regulator ver 1.3 10 packing information t o - 2 5 2 symbol min nom max a1 0 - 0 . 1 0 a2 2 . 2 2 . 3 0 2 . 4 0 a3 1 . 0 2 1 . 0 6 7 1 . 1 2 b 0 . 7 5 - 0 . 8 4 b1 0 . 7 4 0 . 7 6 0 . 7 9 c 0 . 4 9 - 0 . 5 7 c1 0 . 4 8 0 . 5 0 8 0 . 5 2 d 6 . 5 0 6 . 6 0 6 . 7 0 d1 5 . 3 r e f d2 4 . 7 0 - - e 9 . 9 0 1 0 . 1 0 1 0 . 3 0 e1 6 . 0 0 6 . 1 0 6 . 2 0 e2 5 . 3 r e f e 2 . 2 8 6 b s c l 1 . 4 0 1 . 5 0 1 . 6 0 l 2 0 . 9 0 - 1 . 2 5 l 3 0 . 6 0 0 . 8 0 1 . 0 0 l 4 1 . 6 0 1 . 7 0 1 . 8 0
ace1117c 1a bipolar linear regulator ver 1.3 11 notes ace does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ace electronics co., ltd. as sued herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sust ain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support de vice or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ace technology co., ltd. http://www.ace - ele.com/
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