unisonic technologies co., ltd ld1117ah linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2017 unisonic technologies co., ltd qw-r102-087.a low drop fixed and adjustable positive voltage regulators ? description the utc ld1117ah is a low dropout, 3-terminal positive voltage regulator designed to provide output current up to 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 1.0a * built-in current limit and ov er temperature protection * low current consumption * support mlcc ? ordering information ordering number lead free halogen free package 1 pin assignment ? packing pin code 12 3 a g o i b o g i c g i o d i g o ld1117ahl-xx-aa3- 1 -r ld1117ahg-xx-aa3- 1 -r sot-223 r: tape reel notes: 1. pin assignment: i: v in o: v out g: gnd 2. xx: output voltage, refe r to marking information. (1) r: tape reel (2) refer to pin assignment (3) aa3: sot-223 (4) xx: refer to marking information (5) g: halogen free and lead free, l: lead free ld1117ahg-xx-aa3- 1 - 2 (1)packing type (2)pin assignment (3)package type (4)output voltage code (5)green package
ld1117ah linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r102-087.a ? marking information package voltage code marking sot-223 3 3 : 3 . 3 v ? block diagram
ld1117ah linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r102-087.a ? absolute maximum ratings (t a =25c) parameter symbol ratings unit dc input voltage v in 20 v power dissipation p d internally limited junction temperature t j +150 c operating temperat ure (note 2) t opr -20 ~ +125 c storage temperature t stg -65 ~ +150 c notes: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. this condition is only determined from desi gn. it can't be 100% tested in mass production. ? recommended operating ratings parameter symbol ratings unit input voltage v in 15 v operating junction temperature t j -20 ~ +125 c ? thermal data parameter symbol ratings unit junction to ambient ja 165 c/w junction to case jc 15 ? c/w ? electrical characteristics (t a =25c, refer to the test circuits, t j =0 ~ 125c, c o =10 f unless otherwise specified) for ld1117ah-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, 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, 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 1000 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 =6.3v, v ripple =1v pp 60 75 db i out =100ma 1.00 1.10 i out =500ma 1.15 1.25 i out =800ma 1.20 1.30 dropout voltage v d i out =1a 1.20 1.30 v thermal regulation t a =25c, 30ms pulse 0.01 0.10 %/w
ld1117ah linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r102-087.a ? typical applications in out utc ld1117ah + + 10f 100f v in gnd v out fig.1 tyncal application circuit in out utc ld1117ah 10f 10f v in gnd v out fig.2 tyncal application circuit (for mlcc) in out gnd utc ld1117ah + + 100f 10f v in floating input v out fig.3 negative supply
ld1117ah linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r102-087.a ? typical applications(cont.) in utc ld1117ah + 22f 10f + 110 110 110 110 18-27 lines 4.75v to 5.25v out gnd fig.4 active terminator for scsi-2 bus fig.5 circuit for increasing output voltage
ld1117ah linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r102-087.a ? typical characteristics
ld1117ah linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r102-087.a ? typical characteristics(cont.) 0 24 6810 0 2 4 6 8 10 c o (f) esr(ohm) safe operating area vs. capacitor esr i o =10ma~1.0a 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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