www.siliconstandard.com 1 of 6 cathode 1 reference 1 SS2432G dual adjustable precision shunt regulator pin configuration the SS2432G consists of a pair of low-voltage adjustable shunt r egulators with a guaranteed thermal stability over the applicable temperature range. the output voltage can be set to any value between v ref (approximately 1.2 5v) to 12v with two external resistors (see application circuit). this device has a typical output impedance of 0.25 ohms. active output circuitry provides very sharp turn-on characteristics, making this device an excellent replacement for zener diodes in many applications. the SS2432G is characterized for operation from 0c to 105c. description low voltage operation (1.25v) adjustable output voltage from vo = v ref to 12v wide operating current range from 55ua to 100ma low dynamic output impedance 0.25w typ. esd rating is 6kv (per mil-std 883d) linear regulators adjustable supplies switching power supplies battery operated computers instrumentation computer disk drives features applications cathode 2 reference 2 common anode package the device is supplied in a sot23-6 package. pin 1 : cathode 1 pin 2 : common anode pin 3 : cathode 2 pin 4 : reference 2 pin 5 : common anode pin 6 : reference 1 reference 1 anode reference 2 cathode 2 anode cathode 1 1 3 2 5 6 4 1/14/2005 rev.2.10 pb-free lead finish (second-level interconnect).
www.siliconstandard.com 2 of 6 SS2432G parameter symbol maximum units cathode voltage v ka 12 v continuous cathode current i ka 150 ma reference current i ref 3 ma operating junction temperature t j 150 c storage temperature range t stg -45 to +150 c thermal resistance q ja 160 c/w lead temperature (soldering - std.lead finish) t lead 260c/10 sec. parameter symbol test circuit test conditions min typ max
1% v ref 1 reference voltage v ka = v ref i ka = 10ma 1.228 1.240 1.252 v deviation of reference voltage over full temperature range v i(dev) 1 t a = full range v ka = v ref , i ka = 10ma 4 12 mv ratio of change in reference voltage to the change in cathode voltage dvref d vka 2 i ka = 10ma, d v ka = v ref to 12v -1.5 -2.7 mv/v reference current iref 2 i ka = 10ma, r1 = 10kw , r2 = 0.15 0.5 ma deviation of reference current over full temperature range i i(dev) 2 ika = 10ma, r1 = 10kw, r2 = ta = full range 0.05 0.30 ma minimum cathode current for regulation imin 1 v ka = v ref 55 80 ma off-state cathode current i off 3 v ka = 12v, v ref = 0 0.001 0.1 ma dynamic impedance |z ka | 1 i ka = 100ma to 100ma, v ka = v ref ? f 1khz 0.25 0.4 w absolute maximum ratings over ambient temp. range. electrical characteristics (t a =25c) 1/14/2005 rev.2.10
www.siliconstandard.com 3 of 6 SS2432G 1/14/2005 rev.2.10 typical peformance characteristics cathode current vs. cathode voltage cathode current (ma) cathode voltage (v) cathode current vs. cathode voltage cathode current ( m a) cathode voltage (v) reference voltage vs. junction temperature
!"#!$%& & reference input current vs. junction temperature
!"#!$%& & v ka = vref t a = 25c vka = vref ta = 25c
www.siliconstandard.com 4 of 6 SS2432G
application information test circuits t 2 t 1 v max v dev = v max -v min v min temperature deviation of reference input voltage, v dev , is d efined as the maximum variation of the reference input voltage over the full temperature range. the average temper ature coefficient of the reference i n- put voltage, a v ref is d e fined as: t1t2 10 25c) (at v v t1t2 6 10 25c) (at v v - v c ppm v 6 ref dev ref min max ref - ? ? = - ? ? = d where: t 2 - t 1 =full temperature change. a v ref can be positive or negative depending on whether the slope is positive or negative. example: v de v = 12.0mv, v ref = 1240mv, t 2 - t 1 = 105 c , slope is negativ e . 92ppm/c v 105c 6 10 1240 mv 12.0mv ref -= ? ? = a note 4. the dynamic output impedance, r z , is d e- fined as: r z = z z v i d d when the device is programmed with two external r e- sistors, r1 and r2, (see fig. 2), the dynamic output impedance of the overall circuit, is defined as: [ ] r2 r1 1 rz i v z r + @ d d = 1/14/2005 rev.2.10
www.siliconstandard.com 5 of 6 r1a r2a r2b r1b v in output turns on when low limit SS2432G 1/14/2005 rev.2.10
www.siliconstandard.com 6 of 6 in formation furnished by silicon standard corporation is believed to be accurate and reliable. however, silicon standard corporation makes no guarantee or warranty, expre ss or implied, as to the reliability, accuracy, timeliness or completeness of such information and assumes no responsibility for its use, or for infringement of any patent or other intellectual property rights of third parties that may result from its use. silicon standard reserves the right to make changes as it deems necessary to any products described herein for any reason, including without limitation enhancement in reliability, functionality or design. no license is granted, whether expressly or by im plication, in relation to the use of any products described herein or to the use of any information provided herein, under any patent or other intellectual property rights of silicon standard corporation or any third parties. SS2432G 1/14/2005 rev.2.10 package dimensions
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