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? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 1 ? description the ACE432 is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. the output voltage can be set to any value between v ref )approximately 1.24v) to 8v with two external resistors. the device has a typical output impedance of 0.30 ? . active output circuitry provides a very sharp turn on characteristic, making this device excellent r eplacement for zener diodes in many applications. the ACE432 is characterized for operation from 0 to 105 , and two package options (sot-23-3 and to-92) allow the designer the opportunity to select the proper package for their applications. features ? low voltage operation (1.24v) ? adjustable output voltage v d =v ref to 8v ? wide operating current range 60 a to 100ma ? low dynamic output impedance 0.30 ? (typ.) ? trimmed bandgap design up 0.5% ? esd rating is 2.5kv (per mil-std-883d) application ? linear regulators ? adjustable supplies ? switching power supplies ? battery operated computers ? instrumentation ? computer disk drives absolute maximum ratings parameter symbol max unit cathode to anode voltage (note 2) v ka 8 v continuous cathode current i ka 150 ma reference input current i ref 3 ma thermal resistance junction to ambient to-92 sop-8 sot-89-3 sot-23-3 sot-23-5 ja 220 150 120 230 230 o c/w operating junction temperature t j 150 o c storage temperature range t stg - 45 to 150 o c lead temperature (soldering) 10sec t lead 260 o c note 1: exceeding these rating could caus e damage to the device. all voltages are with respect to ground. currents are positive into, negative out of the specified terminal. note 2: voltage values are with respect to the anode terminal unless otherwise noted.
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 2 packaging type to-92 sop-8 sot-89-3 sot-23-3(a)/(b) 3 1 1 8 2 2 7 3 3 6 4 5 1 2 3 1 2 sot-23-5 5 4 1 2 3 ordering information selection guide ACE432 xx xxx + h pin to-92 sop-8 sot-89-3 sot-23-3(a) sot-23-3(b) sot-23-5 cathode 1 1 3 2 1 3 anode 2 2.3.6.7 2 3 3 5 ref 3 8 1 1 2 4 nc 4.5 1.2 halogen - free ep : to-92 fm : sop-8 am : sot-89-3 bma: sot-23-3(a) bmb: sto-23-3(b) bn : sot-23-5 reference voltage accuracy : a : 0.5% b : 1% c: 1.5% d: 2% ? pb - free
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 3 power dissipation table package ja ( o c /w ) df(mw/ ) ta R 25 t a 25 o c power rating(mw) t a =50 o c power rating(mw) t a = 75 o c power rating (mw) ep 220 6.41 568 455 341 bm 230 3.50 543 435 326 note: 1.exceeding the maximum allowable power dissipation will re sult in excessive die temperature, and the regulator will go into thermal shutdown. 2.t j : junction temperature calculation t j = t a + ( p d x ja ) the ja numbers are guidelines for the thermal performance of the device/pc-board sy stem. all of the above assume no ambient airflow. 3. ja : thermal resistance-junction to ambient, d f : derating factor, po: power consumption electrical characteristics parameter symbol test conditions min. typ. max. unit 0.5% 1.234 1.240 1.246 1.0% 1.228 1.240 1.252 1.5% 1.211 1.240 1.259 reference voltage 2.0% v ref v ka =v ref , i ka =10ma test circuit #1 1.215 1.240 1.265 v deviation of reference voltage over full temperature range v i(dev) v ka =v ref , i ka =10ma t a =0 to 105 test circuit #1 10 25 mv ratio of change in reference voltage to the change in cathode voltage v ref / ka i ka =10ma v ka =8v to v ref test circuit #2 -1.0 -2.7 mv/v reference current i ref i ka =10ma, r1=10k ? , r2= test circuit #2 0.15 2 a deviation of reference current over full temperature range i i(dev) i ka =10ma, t a =0 to 105 r1=10k ? , r2= test circuit #2 0.10 0.50 a minimum cathode current for regulation i min v ka =v ref test circuit #1 60 100 a off-state cathode current i off v ka =8v, v ref =0 test circuit #3 0.04 0.8 a dynamic impedance iz ka i i ka =100 a-80ma v ka =v ref , f Q 1khz test circuit #1 0.3 1.0 ?
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 4 block diagram symbol diagram typical applications ACE432 test circuits test circuit 1: v ka =v ref test circuit 2: v ka >v ref test circuit 3: off state current
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 5 typical performance characteristics cathode current vs cathode voltage cathode voltage (v) reference voltage vs temperature (iioad=10ma) temperature ( ) reference input current vs temperature (r1=10k, r2= , iioad=10ma) temperature ( )
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 6 typical performance characteristics stability boundary condition 150ohm test circuit for v ka =v ref 150ohm test circuit for v ka =2v, 3v the areas under the curves represent conditions that may cause the device to oscillate. for v ka =2v and 3v curves, r2 and v bat were adjusted to establish the initial v ka and 1k conditions with c l =0. v bat and c l then were adjusted to determine the ranges of stability. as the graph suggested, ACE432 is unconditional stable with ik from 0 to 100ma and with c l from 0.001uf to 1uf.
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 7 packing information to-92
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 8 packing information sop-8
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 9 packing information sot-89-3
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 10 packing information sot-23-3
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 11 packing information sot-23-5
? ??????????????????????????????????????????????????????????????? ???????????????????????? ACE432 ??????????????????????? technology precision adjustable shunt voltage reference ver 1.2 12 notes ace does not assume any responsibility for use as cr itical components in life support devices or systems without the express written approval of the president and general counsel of ace electronics co., ltd. as sued herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ace technology co., ltd. http://www.ace-ele.com/

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