unisonic technologies co., ltd 79dxx linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2007 unisonic technologies co., ltd qw-r101-012.e 3 terminal 0.5a negative voltage regulator ? description the utc 79dxx series of three-terminal negative regulators are available in to-252 and to-251 packages and with several fixed output voltage, making t hem useful in a wide range of application. each type employs inte rnal current limiting, thermal shut-down and safe area prot ection, making it essentially indestructible. ? features * output current up to 0.5a * -5v; -6v;-8v;-12v;-15v;-18v; -24v output voltage available * thermal overload protection * short circuit protection *pb-free plating product number: 79dxxl ? ordering information ordering number pin assignment normal lead free plating 1 2 3 package packing 79dxx-tm3-t 79DXXL-TM3-T g i o to-251 tube 79dxx-tn3-r 79dxxl-tn3-r g i o to-252 tape reel 79dxx-tn3-t 79dxxl-tn3-t g i o to-252 tube note: 1. xx: output voltage, refer to mark ing information 2. pin code: i: input g: gnd o: output
79dxx linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r101-012.e ? marking information package voltage code marking to-251 to-252 05 : -5v 06 : -6v 08 : -8v 12 : -12v 15 : -15v 18 : -18v 24 : -24v
79dxx linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r101-012.e ? block diagram voltage reference protection circuitry gnd output input rsc r2 r1
79dxx linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r101-012.e ? absolute maximum ratings (ta=25 c) parameter symbol ratings unit v out = -5 ~ -18v -35 v input voltage v out = -20 ~ -24v v in -40 v operating temperature t opr -40 ~ + 8 5 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. ? thermal data parameter symbol ratings unit thermal resistance junction-air ja 65 c /w thermal resistance junction-cases jc 5 c /w ? electrical characteristics ( 0 79dxx linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r101-012.e ? electrical characteristics(cont.) for 79d08 (v in =-14v, i out =500ma, c i =2.2uf,c o =1uf) parameter symbol test conditions min typ max unit t j =25 c -7.68 -8.0 -8.32 v output voltage v out 5.0ma 79dxx linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r101-012.e ? electrical characteristics(cont.) for 79d15 (v in =-23v, i out =500ma, c i =2.2uf, co=1uf) parameter symbol test conditions min typ max unit t j =25 c -14.40 -15.0 -15.60 v output voltage v out 5.0ma 79dxx linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r101-012.e ? application circuits fig.1 fixed output regulator utc 79d15 1 23 utc 78d15 1 2 3 2.2 f 1 f 0.1 f 0.33 f +20v +15v -15v -20v 1n4001 1n4001 fig.2 split power supply ( 15v, 0.5a) utc 79dxx 1 23 c1 2.2 f c3 2.5 f c2 1 f -v out -v in r1 r2 fig.3 circuit for incr easing output voltage 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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