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unisonic technologies co., ltd ld1117/a linear integrated circuit www.unisonic.com.tw 1 of 15 copyright ? 2012 unisonic technologies co., ltd qw-r102-006.ag low drop fixed and adjustable positive voltage regulators ? description the utc ld1117/a is a low dropout, 3-terminal positive voltage regulator designed to provide output current up to 800ma/1a, there are adjustable version (v ref =1.25v) and various fixed versions. ? features * low dropout voltage * suitable for scsi-2 active termination if v out set to 2.85v * output current up to 0.8a for 1117 and 1.0a for 1117a * built-in current limit and ov er temperature protection * available in 1%(at 25c) and 2% in all temperature range * low current consumption * support mlcc ? ordering information ordering number package d pin assignment e packing lead free halogen free ld1117 c l-xx-aa3- d - e ld1117 c g-xx-aa3- d - e sot-223 r: tape reel t: tube ld1117 c l-xx-ab3- d - e ld1117 c g-xx-ab3- d - e sot-89 pin code 12 3 ld1117 c l-xx-ta3- d - e ld1117 c g-xx-ta3- d - e to-220 a g o i ld1117 c l-xx-tf3- d - e ld1117 c g-xx-tf3- d - e to-220f b o g i ld1117 c l-xx-tn3- d - e ld1117 c g-xx-tn3- d - e to-252 c g i o ld1117 c l-xx-tq2- d - e ld1117 c g-xx-tq2- d - e to-263 d i g o ld1117 c l-xx-tq3- d - e ld1117 c g-xx-tq3- d - e to-263-3 ld1117 c l-xx-s08- d - e ld1117 c g-xx-s08- d - e sop-8 gooixoox note: pin assignment: i: v in o: v out g: gnd/adj (1) r: tape reel, t: tube (2) refer to pin assignment (3) aa3: sot-223, ab3: sot-89, ta3:to-220, (3) tf3: to-220f, tn3: to-252, tq2: to-263, (3) tq3: to-263-3, s08: sop-8 (4) xx: refer to marking information (5) g: halogen free, l: lead free (6) blank: 800ma, a: 1a ld1117 l -xx -aa3 - - (1)packing type (2)pin assignment (3)package type (4)output voltage code (5)lead plating (6)current code
ld1117/a linear integrated circuit unisonic technologies co., ltd 2 of 15 www.unisonic.com.tw qw-r102-006.ag ? marking information package voltage code marking sot-89 12 :1.2v 15 :1.5v 18 :1.8v 25 :2.5v 2j :2.85v 30 :3.0v 33 :3.3v 36 :3.6v 50 :5.0v ad :adj sot-223 to-220 to-220f to-252 to-263 to-263-3 note: current code: blank: 0.8a a: 1a ? pin configuration of sop-8 1 nc v in gnd/ adj v out v out v out v out nc 2 3 4 5 6 7 8
ld1117/a linear integrated circuit unisonic technologies co., ltd 3 of 15 www.unisonic.com.tw qw-r102-006.ag ? block diagram
ld1117/a linear integrated circuit unisonic technologies co., ltd 4 of 15 www.unisonic.com.tw qw-r102-006.ag ? absolute maximum ratings (t a =25c) parameter symbol ratings unit dc input voltage v in 18 v power dissipation p d internally limited junction temperature t j +150 c storage temperature t stg -65 ~ +150 c note absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? recommended operating ratings parameter symbol ratings unit input voltage v in 15 v operating junction temperature t j 0 ~ +125 c ? thermal data parameter symbol ratings unit junction to ambient sot-223 ja 165 c/w sot-89 180 c/w sop-8 150 c/w to-252 112 c/w to-220 54 c/w to-263 64 c/w junction to case sot-223 jc 15 c/w sot-89 50 c/w sop-8 20 c/w to-252 12 c/w to-220 4 c/w to-263 4 c/w
ld1117/a linear integrated circuit unisonic technologies co., ltd 5 of 15 www.unisonic.com.tw qw-r102-006.ag ? electrical characteristics (t a =25c, refer to the test circuits, t j =0 ~ 125c, c o =10 f unless otherwise specified) for ld1117/a-1.2 parameter symbol test conditions min. typ. max. unit output voltage v out v in =3.2v, i out =10ma, t j =25c 1.176 1.200 1.224 v output voltage v out v in =2.7 to 8v ld1117 : i out =10~800ma ld1117a : i out =10~1000ma 1.176 1.200 1.224 v line regulation v out v in =2.7 to 8v, i out =10ma 1 6 mv load regulation v out v in =2.7v ld1117 : i out =10~800ma ld1117a : i out =10~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 10v 5 10 ma current limit i limit v in =6.2v, t j =25c ld1117 800 ma ld1117a 1000 minimum load current i o ( min ) v in =15v 2 5 ma output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =4.2v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w for ld1117/a-1.5 parameter symbol test conditions min typ max unit output voltage v out v in =3.5v, i out =10ma, t j =25c 1.470 1.500 1.530 v output voltage v out v in =3 to 8v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1.470 1.500 1.530 v line regulation v out v in =3 to 8v, i out =0ma 1 6 mv load regulation v out v in =3v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 10v 5 10 ma current limit i limit v in =6.5v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =4.5v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w
ld1117/a linear integrated circuit unisonic technologies co., ltd 6 of 15 www.unisonic.com.tw qw-r102-006.ag ? electrical characteristics(cont.) for ld1117/a-1.8 parameter symbol test conditions min. typ. max. unit output voltage v out v in =3.8v, i out =10ma, t j =25c 1.764 1.800 1.836 v output voltage v out v in =3.3 to 8v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1.764 1.800 1.836 v line regulation v out v in =3.3 to 8v, i out =0ma 1 6 mv load regulation v out v in =3.3v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 10v 5 10 ma current limit i limit v in =6.8v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =5.5v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w for ld1117/a-2.5 parameter symbol test conditions min. typ. max. unit output voltage v out v in =4.5v, i out =10ma, t j =25c 2.450 2.500 2.550 v output voltage v out v in =3.9 to 10v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 2.450 2.500 2.550 v line regulation v out v in =3.9 to 10v, i out =0ma 1 6 mv load regulation v out v in =3.9v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 10v 5 10 ma current limit i limit v in =7.5v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =5.5v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w
ld1117/a linear integrated circuit unisonic technologies co., ltd 7 of 15 www.unisonic.com.tw qw-r102-006.ag ? electrical characteristics(cont.) for ld1117/a-2.85 parameter symbol test conditions min typ max unit output voltage v out v in =4.85v, i out =10ma, t j =25c 2.793 2.850 2.907 v output voltage v out v in =4.25 to 10v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 2.793 2.850 2.907 v line regulation v out v in =4.25 to 10v, i out =0ma 1 6 mv load regulation v out v in =4.25v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 10v 5 10 ma current limit i limit v in =7.85v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =5.85v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w for ld1117/a-3.0 parameter symbol test conditions min. typ. max. unit output voltage v out v in =5v, i out =10ma, t j =25c 2.940 3.000 3.060 v output voltage v out v in =4.5 to 10v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 2.940 3.000 3.060 v line regulation v out v in =4.5 to 12v, i out =0ma 1 6 mv load regulation v out v in =4.5v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 15v 5 10 ma current limit i limit v in =8v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25 c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =6v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w
ld1117/a linear integrated circuit unisonic technologies co., ltd 8 of 15 www.unisonic.com.tw qw-r102-006.ag ? electrical characteristics(cont.) for ld1117/a-3.3 parameter symbol test conditions min. typ. max. unit output voltage v out v in =5.3v, i out =10ma, t j =25c 3.234 3.300 3.366 v output voltage v out v in =4.75 to 10v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 3.234 3.300 3.366 v line regulation v out v in =4.75 to 15v, i out =0ma 1 6 mv load regulation v out v in =4.75v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 15v 5 10 ma current limit i limit v in =8.3v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =6.3v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w for ld1117/a-3.6 parameter symbol test conditions min. typ. max. unit output voltage v out v in =5.6v, i out =10ma, t j =25c 3.528 3.600 3.672 v output voltage v out v in =5 to 10v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 3.528 3.600 3.672 v line regulation v out v in =5 to 15v, i out =0ma 1 6 mv load regulation v out v in =5v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 10 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 15v 5 10 ma current limit i limit v in =8.6v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =6.6v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w
ld1117/a linear integrated circuit unisonic technologies co., ltd 9 of 15 www.unisonic.com.tw qw-r102-006.ag ? electrical characteristics(cont.) for ld1117/a-5.0 parameter symbol test conditions min. typ. max. unit output voltage v out v in =7v, i out =10ma, t j =25c 4.900 5.000 5.100 v output voltage v out v in =6.5 to 15v ld1117 : i out =0~800ma ld1117a : i out =0~1.0a 4.900 5.000 5.100 v line regulation v out v in =6.5 to 15v, i out =0ma 1 10 mv load regulation v out v in =6.5v ld1117 : i out =0~800ma ld1117a : i out =0~1000ma 1 15 mv temperature stability v out 0.5 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in i out =100ma 15 v quiescent current i q v in 15v 5 10 ma current limit i limit v in =10v, t j =25c ld1117 800 ma ld1117a 1000 output noise voltage e n b=10hz to 10khz, t j =25c 100 v supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in =8v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w for ld1117/a-adj parameter symbol test conditions min typ max unit reference voltage v ref v in -v out =2v, i out =10ma, t j =25c 1.225 1.25 1.275 v reference voltage v ref v in -v out =1.4 to 10v ld1117 : i out =10~800ma ld1117a : i out =10~1000ma 1.225 1.25 1.275 v line regulation v out v in -v out =1.5 to 13.75v, i out =10ma 0.035 0.2 % load regulation v out v in -v out =3v ld1117 : i out =10~800ma ld1117a : i out =10~1000ma 0.1 0.4 % temperature stability v out 0.50 % long term stability v out 1000 hrs, t j =125c 0.3 % operating input voltage v in 15 v adjustment pin current i adj v in 15v 60 120 a adjustment pin current change i adj v in -v out =1.4 to 10v, ld1117 : i out =10 ~ 800ma ld1117a : i out =10 ~ 1000ma 1 5 a minimum load current i o(min) v in =15v 2 5 ma current limit i limit v in -v out =5v, t j =25c ld1117 800 ma ld1117a 1000 output noise (%v o ) e n b=10hz to 10khz, t j =25c 0.003 % supply voltage rejection svr i out =40ma, f=120hz, t j =25c, v in -v out =3v, v ripple =1v pp 60 75 db dropout voltage v d i out =100ma 1.00 1.10 v i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 i out =1a 1.20 1.30 thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w
ld1117/a linear integrated circuit unisonic technologies co., ltd 10 of 15 www.unisonic.com.tw qw-r102-006.ag ? typical applications in out utc ld1117/a-xx + + 10f 100f v in gnd/adj v out fig.1 tyncal application circuit in out utc ld1117/a-xx 10f 10f v in gnd/adj v out fig.2 tyncal application circuit (for mlcc) fig.3 negative supply
ld1117/a linear integrated circuit unisonic technologies co., ltd 11 of 15 www.unisonic.com.tw qw-r102-006.ag ? typical applications(cont.) in utc ld1117/a- 2.85v + 22f 10f + 110 110 110 110 18-27 lines 4.75v to 5.25v out gnd/adj fig.4 active terminator for scsi-2 bus fig.5 circuit for increasing output voltage
ld1117/a linear integrated circuit unisonic technologies co., ltd 12 of 15 www.unisonic.com.tw qw-r102-006.ag ? application note of ld1117/a adjustable the ld1117/a adjustable has a reference voltage of between the out and adj/gnd pins. i adj is 60a typ. (120a max.) and i adj is 1 a typ. (5a max.). r 1 is normally fixed to 120 ? . from figure 4 we obtain: v out =v ref +r 2 (i adj +i r1 )=v ref + r 2 (i adj +v ref /r 1 )=v ref (1+r 2 /r 1 ) + r 2 x i adj . usually r 2 value is in the range of few k ? , so the r 2 x i adj product could be neglected; then the above expression becomes: v out =v ref (1+r 2 /r 1 ) for better load regulation, realize a good kelvin connection of r 1 and r 2 is important. particularly r 1 connection must be realized very close to out and adj/gnd pin, while r 2 ground connection must be placed as near as possible to the negative load pin. ripple rejection can be improved by introducing a 10 f electrolytic capacitor placed in parallel to the r 2 resistor (see fig. 8) fig.6 adjustable output vo ltage application circuit fig.7 adjustable output voltage ap plication circuit (for mlcc) fig.8 adjustable output voltage app lication with improved ripple rejection.
ld1117/a linear integrated circuit unisonic technologies co., ltd 13 of 15 www.unisonic.com.tw qw-r102-006.ag ? typical characteristics output voltage deviation(mv) load current(ma) output voltage deviation(mv) input voltage change(v) ripple rejection (db) dropout voltage, v d (v)
ld1117/a linear integrated circuit unisonic technologies co., ltd 14 of 15 www.unisonic.com.tw qw-r102-006.ag ? typical characteristics(cont.) output voltage deveiation (%) temperature (c) load regulation short-circuit current short circuit current (a) input/output differential (v) 05 10 0 1.6 2.4 0.4 1.2 2.8 0.8 2.0 t j =25c t j =125c -0.12 -0.04 0.08 0.16 0 0.12 -0.08 -50 0 75 125 25 -25 50 100 i load =1a 0.04 reference voltge vs. temperature output voltage vs. temperautre -75 junction temperature(c) reference voltage, v ref (v) junction temperature, t j (c) -75 output voltage, v out (v) 3.20 maximum power dissipation 25 65 105 4 6 8 10 case temperature, t c (c) power (w) to-263 & to-252 sot-223 2 1.255 1.205 1.210 1.215 1.220 1.225 1.230 1.235 1.240 1.245 1.250 -25 0 25 50 75 100 125 150 175 3.25 3.30 3.35 3.40 3.45 3.50 3.55 3.60 3.65 3.70 -50 -25 0 25 50 75 100 125 150 175 v out =3.3v v out set with 1% resistors 45 85 125 0 output voltage vs. temperautre junction temperature, t j (c) -75 output voltage, v out (v) 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 -50 -25 0 25 50 75 100 125 150 175 v out =1.8v v out set with 1% resistors -50
ld1117/a linear integrated circuit unisonic technologies co., ltd 15 of 15 www.unisonic.com.tw qw-r102-006.ag ? typical characteristics(cont.) junction temperature, t j (c) -75 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 -50 -25 0 25 50 75 100 125 150 175 v out =2.5v v out set with 1% resistors 0 24 6810 0 2 4 6 8 10 c o (f) safe operating area vs. capacitor esr i o =10ma~1.0a output voltage vs. temperautre utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.

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