1 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 3 - terminal fixed negative voltage regulator ? general description the ax7905/12 series of fixed output negative voltage regulators are intended as complements to the popular ts7800 series device. these negative regulators are available in the same seven - vol tage options as the ax7905/12 devices. in addition, one extra voltage option commonly employed in mecl systems is also available in the negative ax7905/12 series. available in fixed output voltage options from - 5.0 to - 24 volts, these regulators employ cur rent limiting, thermal shutdown, and safe - area compensation -- making them remarkably rugged under most operating conditions. with adequate heat sinking they can deliver output currents in excess of 1 ampere. this series is offered in 3 - pin to - 220 and to252 package. ? features - output voltage: - 5 and - 12v - output current up to 1a - no external components required - internal thermal overload protection - internal short - circuit current limiting - output transistor safe - area compensation - output voltage offered in 4% tolera nce ? pin assignment the package s of ax7905/12 are to220 - 3l and to252 - 3l ; the pin assignment is given by : name description gnd grand in (tab) voltage input out voltage output 3 2 1 i n ( t a b ) t o 2 5 2 - 3 l t o p v i e w m e t a l t a p i n o u t g n d t o 2 2 0 - 3 l 3 2 1 t o p v i e w g n d m e t a l t a p i n o u t i n ( t a b )
2 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 ? or der /marking information order information top marking ? absolute maximum ratings ( t a = 25 c unless otherwise noted ) characteristics symbol rating unit input voltage v in - 35 v power dissipation p d internal limited w junction temperature t j +150 c storage temperature range t stg - 65~+150 c thermal resistance - junction to case to 220 - 3l jc 5 c /w to 252 - 3l 10 thermal resistance - junction to ambient to 220 - 3l ja 45 c /w to 252 - 3l 55 not e: follow the derating curve a x 7 9 x x x x p a c k a g e p r d u c t d : t o 2 5 2 - 3 l t : t o 2 2 0 - 3 l 0 5 : a x 7 9 0 5 1 2 : a x 7 9 1 2 p a c k i n g b l a n k : t u b e a : t a p i n g y a x 7 l o g o i d c o d e : i n t e r n a l w w : 0 1 ~ 5 2 y e a r : 1 0 = 2 0 1 0 1 1 = 2 0 1 1 p a r t n u m b e r 0 5 : a x 7 9 0 5 1 2 : a x 7 9 1 2 y w w x 9 x x
3 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 ? electrical characteristics ax 7905 electrical characteristics (v in =10v, i out =500ma, 0 c ? tj ? 125 c , c in =0.33u f, c out =0.1uf; unless otherwise specified.) parameter symbol test condition min typ max unit ou tput voltage v out tj=25 c - 4.80 - 5 - 5.20 v - 7.5v ? v in ? - 20v, 10ma ? i out ? 1a, pd ? 15w - 4.75 - 5 - 5.25 line regulation re gline tj=25 c - 7.5v ? v in ? - 25v - 3 100 mv - 8v ? v in ? - 12v - 1 50 load regulation re gload tj=25 c 10ma ? i out ? 1a - 15 100 250ma ? i out ? 75 0ma - 5 50 quiescent current iq i out =0, tj=25 c - 4 8 ma quiescent current change iq - 7.5v ? v in ? - 25v - -- 1.3 10ma ? i out ? 1a - -- 0.5 output noise voltage vn 10hz ? f ? 100khz, tj=25 c - 40 - v ripple rejection ratio rr f=120hz, - 8v ? v in ? - 18v 62 74 - db voltage drop v drop i out =1a, tj=25 c -- 2 - v output short circuit current i os tj=2 c - 750 - ma peak output current io peak tj=25 c - 2.1 - a temperature coefficient of output voltage v out / tj i out =10ma, 0 c ? tj ? 125 c - - 0.1 - mv/ c
4 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 ? electrical characteristics ( co n tinue ) ax 791 2 electrical characteristics (v in = - 19v, i out =500ma, 0 c ? tj ? 125 c , c in =0.33uf, c out =0.1uf; unless otherwise specified.) parameter symbol test condition min typ max unit output voltage v out tj=25 c - 11.53 - 12 - 12.48 v - 14.5v ? v in ? - 27v, 10ma ? i out ? 1a, pd ? 15w - 11.42 - 12 - 12.60 line regulation re gline tj=25 c - 14.5v ? v in ? - 30v - 10 240 mv - 15v ? v in ? - 19v - 3 120 load regulation re gload tj=25 c 10ma ? i out ? 1a - 12 240 250ma ? i out ? 750ma - 4 120 quiescent current iq tj=25 c , i out =0 - 4.3 8 ma quiesce nt current change iq - 14.5v ? v in ? - 30v - - 1 10ma ? i out ? 1a - - 0.5 output noise voltage vn 10hz ? f ? 100khz, tj=25 c - 75 - uv ripple rejection ratio rr f=120hz, - 15v ? v in ? - 25v 55 70 - db voltage drop v drop i out =1a, tj=25 c - 2 - v output short circuit current i os tj=25 c - 350 - ma peak output current io peak tj=25 c - 2.1 - a temperature coefficient of output voltage v out / tj i out =10ma, 0 c ? tj ? 125 c - - 1 - mv/ c note 1 : pulse testing techniques are used to maintain the junction temperature a s close to the ambient temperature as possible, and thermal effects must be taken into account separately. note 2 : this specification applies only for dc power dissipation permitted by absolute maximum ratings.
5 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 ? a pplication c ircuit note 1 : a common ground is required between the input and the output voltages. the input voltage must remain typically 2.0v above the output voltage even during the low point o n the input ripple voltage. note 2 : xx = these two digits of the type nu mber indicate voltage. * = cin is required if regulator is located an appreciable distance from power supply filter. ** = co is not needed for stability; however, it does improve transient response. ? typical characteristics worse case power dissipation as a function of ambient temperature peak output current as a function of input - output differential voltage ripple rejection as a function of frequency ripple rejection as a function of output voltage
6 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 ? typical characteristics output voltage as a function of junction temperature output voltage as a function of junction temperature d 2 pak thermal resistance and maximum power dissipation vs. p.c.b copper length
7 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 ? p ackage o utlines (1) to252 - 3l symbol dimensions in millimeters dimensions in inches min. nom. max. min. nom. max. a 2.18 2.29 2.39 0.086 0.09 0.094 a1 - - 0.13 - - 0.005 b 0.51 0.71 0.89 0.02 0.028 0.035 b2 4.95 5.21 5.46 0.195 0.205 0.215 c 0.46 0.53 0.61 0.018 0.02 1 0.024 c1 0.46 0.53 0.58 0.018 0.021 0.023 d 5.33 5.46 6.22 0.21 0.215 0.245 d1 4.57 - - 0.18 - - e 6.35 6.55 6.73 0.25 0.258 0.265 e 2.29 bsc 0.090 bsc. e1 4.58 bsc 0.180 bsc. h 9.4 9.7 10.4 0.37 0.382 0.41 l 1.4 1.6 1.78 0.055 0.063 0.07 l1 - - 1.02 - - 0.04 l2 1.52 1.78 2.03 0.06 0.07 0.08 mold flash shall not exceed 0.005inch per side jedec outline: to - 252 b 2 e e b l 2 e 1 d l 1 h a c 1 c a 1 s e a t i n g p l a n e l 5 . 6 1 1 . 0 5 . 6 2 . 0 2 . 2 5 l a n d p a t t e r n r e c o m m e n d a t i o n ( u n i t : m m ) 7 . 2 1 . 2 d 1
8 / 8 axelite confidential materials, do not copy or distribute without written consent . rev. 1.0 apr . 2 6 , 20 11 ax79 05/12 (2) to220 - 3l symbol dimensions in millimeters dimensions in inches min. nom. max. min. nom. max . a 3.55 4.19 4.83 0.14 0.165 0.19 b1 1.14 1.45 1.78 0.045 0.057 0.07 b 0.38 0.69 1.02 0.015 0.027 0.04 c 0.36 0.48 0.61 0.014 0.019 0.024 d 14.2 15.4 16.5 0.56 0.605 0.65 e 9.7 10.2 10.7 0.38 0.4 0.42 e 2.54bsc 0.1bsc e1 5.08bsc 0.2bsc f 0.51 0.9 5 1.397 0.02 0.038 0.055 h1 5.84 6.35 6.86 0.23 0.25 0.27 j1 2.03 2.48 2.92 0.08 0.098 0.115 l 12.7 13.7 14.73 0.5 0.54 0.58 l1 6.35 0.25 p 3.53 3.81 4.09 0.139 0.15 0.161 q 2.54 2.98 3.43 0.1 0.118 0.135 mold flash shall not exceed 0.005inch per side jedec outline: to - 220 ab a j 1 f c s e a t i n g p l a n e d q e l 1 l b e e 1 b 1 h 1 a j 1 f c s e a t i n g p l a n e d q e l 1 l b e e 1 b 1 h 1 p
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