2016. 03. 23 1/6 revision no : 3 cathode (k) anode ( a ) reference (r) 2.5v ref + - reference (r) anode (a) cathode (k) programmable precision references the kia431aa/ba/ca series integrated circuits are three-terminal programmable shunt regulator diodes. these monolithic ic voltage reference operate as a low temperature coefficient zener which is programmable from v ref to 36 volts with two external resistors. it features a low mnimum cathode current for regulation. the typical value of 50ua make the parts ideal for low power application. these devices exhibit a wide operating current range of 0.1ma to 100ma with a typical dynamic impedance of 0.22 ? . the characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. the 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since the kia431aa/ba/ca series operates as a shunt regulator, it can be used as either a positive or negative voltage reference. features h programmable output voltage to 36v h low minimum operation current : 50 a(typ.@25 ? ) h low dynamic output impedance : 0.22 ? (typ.). h sink current capability of 0.1ma to 100ma. h typical temperature drift : 5mv (0 ? to 70 ? ) semiconductor technical data kia431aa/ba/ca series bipolar linear integrated circuit block diagram sot-23(2) m j k e g a n c b d ll dim millimeters a b c d e 2.90 0.1 1.30+0.20/-0.15 0.40+0.15/-0.10 2.40+0.30/-0.20 g 1.90 0.2 j k l m n 0.10+0.10/-0.05 0.00 ~ 0.10 0.55 0.20 min 1.00+0.20/-0.10 1.30 max + _ + _ n m 0.45 max n m c c f f h ja b 3 2 1 d 1.27 0.20 14.00 0.50 0.45 0.30 3.70 max 4.80 max 4.70 max j f d c b a millimeters dim to-92(1) + _ + _ 1.25 0.10 + _ + _
2016. 03. 23 2/6 kia431aa/ba/ca series revision no : 3 line up ordering information kia431 pb-free / halogen-free packing specification pin configuration package code i min specification v ref tolerance code type no. operating voltage(v) package marking kia431aa 2.5 ~ 36 to-92(1) - kia431ba kia431ca kia431aam sot-23(2) 4aa kia431bam 4ba kia431cam 4ca KIA431AAM2 41a kia431bam2 41b kia431cam2 41c v ref tolerance code i min code package code pin configuration packing specification pb-free / halogen-free a ? 1.0% code spec. blank to-92(1) blank a-type rtk rtk type p pb-free b ? 0.5% a 100ua (max) m sot-23(2) 2 b-type h halogen-free c ? 0.3% pin assignments 3 21 cathode ref anode ( a-t y pe ) sot-23(2) 3 21 cathode ref anode ( b-t y pe ) sot-23(2) 3 2 1 anode reference cathode to-92(1)
2016. 03. 23 3/6 kia431aa/ba/ca series revision no : 3 electrical characteristics (ta=25 ? ) maximum ratings (ta=25 ? ) recommended operation condition characteristics symbol test circuit test condition min. typ. max. unit reference input voltage kia431aa (1.0%) v ref figure 1 v ka =v ref , i k =10ma 2.470 2.495 2.520 v kia431ba (0.5%) 2.483 2.495 2.507 kia431ca (0.3%) 2.487 2.495 2.503 reference input voltage deviation over temperature range v ref figure 1 (note 1) v ka =v ref , i k =10ma, ta= 0 ? to 70 ? - 5 17 mv ratio of change in reference input voltage to change in cathode to anode voltage v ref / v ka figure 2 i k =10ma v ka = 10v q v ref - -1.4 -2.7 mv/v v ka = 36v q 10v - -1.0 -2.0 reference input current i ref figure 2 i k =10ma, r1=10k ? , r2= ? - 0.3 4 a reference input current deviation over temperature range i ref figure 2 i k =10ma, r1=10k ? , r2= ? - 0.15 1.2 a minimum cathode current for regulation i min figure 1 v ka =v ref - 50 100 a off-state cathode current i off figure 3 v ka =36v, v ref =0v - 0.05 0.9 a dynamic impedance z ka figure 1 (note 2) v ka =v ref , i k =1.0 q 100ma, f " 1.0khz - 0.22 0.5 ? note1) package mounted on 99.5% alumina 10 ? 8 ? 0.6mm symbol condition min max unit v ka cathode to anode voltage v ref 36 v i k cathode current 0.1 100 ma characteristic symbol rating unit cathode to anode voltage v ka 40 v cathode current range, continuous i k -100 ~ 150 ma reference input current range, continuous i ref -0.05 ~ 10 ma maximum junction temperature t j, max 150 ? operating temperature t opr -40 ~ 125 ? storage temperature t stg -65 ~ 150 ? total power dissipation kia431 p d 700 mw kia431m (note1) 350 thermal resistance kia431 r th(j-a) 179 ? /w kia431m (note1) 357
2016. 03. 23 4/6 kia431aa/ba/ca series revision no : 3 input figure 1-test circuit for v ka = v ref off i ka v input figure 3-test circuit for i off ka i l *c 1 r 2 r 150 figure 4-test circuit for satbility boundary conditions figure 2-test circuit for v ka > v ref i k i k v ka v ka input r1 r2 i ref v ka = v ref ( 1+ ) + i ref r1 r1 r2 max. min. t1 t2 ambient temperature - v ref (min.) ta = t 2 - t 1 v ref v ref v ref v ref = v ref (max.) v ref example : v ref = 8.0mv and slope is positive, v ref at 25 ? =2.495v, ta=70 ? 0.008 ? 10 6 ? v ref = = 45.8 ppm/ ? 70 ? (2.495) note 2: the dynamic impedance z ka is defined as: v ka |z ka | = i k when the device is programmed with two external resistors, r1 and r2, (refer to figure 2) the total dynamic impedance of the circuit is defined as: r1 |z ka? | = |z ka | (1+ ) r2 note 1: the deviation parameter v ref is defined as the differences between the maximum and minimum values obtained over the full operating ambient temperature range that applies. * note 1: recommend using more than c l = 10uf under i ka = 1ma the average temperature coefficient of the reference input voltage, v ref , is defined as: v ref ( ) ? 10 6 ppm v ref at 25 ? ? v ref ( ) = ? ta v ref ? 10 6 = ta(v ref at 25 ? ) ? v ref can be positive or negative depending on whether v ref min. or v ref max. occurs at the lower ambient temperature.
2016. 03. 23 5/6 kia431aa/ba/ca series revision no : 3 cathode voltage v ka (v) 125 100 25 50 -50 0 -25 load capacitance c l (uf) stability boundary conditions 0.15 reference input current 0 0.25 0.20 0.40 0.35 0.30 i (ua) 20 0 cathode current i k (ma) 40 150 100 k ka -50 cathode current i (ma) -100 2 1 03 -2 -1 i - v k 0 50 ref ka ta=25 c v =v ref 75 60 80 100 120 140 100p 10u 10n 1n 100n 1u ta=25 c a : v ka =v ref b : v ka =5.0v c : v ka =10v d : v ka =15v pulse response time t ( s) 3.0 5.0 0 voltage swing (v) 20 15 10 25 5 0 0 2.0 1.0 ta=25 c output input i ref - t a cathode voltage v ka (v) 50 k ka cathode current i ( a) -10 i - v k 10 30 ambient temperature ta ( c) reference voltage 2.480 2.490 2.485 2.505 2.500 2.495 v (v) ref v ref - t a ambient temperature ta ( c) a b c d 1 0 3 2 -1 ref ka ta=25 c v =v stable unstable stable -10 10 30 50 70 90 110 130
2016. 03. 23 6/6 kia431aa/ba/ca series revision no : 3 precaution for use lead-free soldering condition. elements mounting styles of electronic devices are gaining in further diversification over recent years, and needs for components are all the more expanding in varieties. especially, surface mounting is steadily penetrating into industrial segments as a world-wide popular technical trend. although exposure to high temperature is inevitable during soldering we recommend limiting the soldering temperature to low levels as shown in figure for the sake of retaining inherent excellent reliability. 1. when employing solder reflow method 1) soldering condition ? standard condition : 250 ? (temperature), 10 ? 1sec. (time) ? peak condition : 260 ? 3 ? 2) recommend temperature profile 3) precautions on heating method when resin in kept exposed to high temperature for a long time, device reliability may be marred. therefore, it is essential to complete soldering in the shortest time possible to prevent temperature of resin from rising. 2. when employing halogen lamps or infrared-ray heaters when halogen lamps or infrared-ray heaters are used, avoid direct irradiation onto resin surfaces; such devices cause extensive localized temperature rise. ? please keep a reflow solder operating when surface mount package s soldering. time ( sec ) 150 c 180 c peak : 260 3 c temperature ( c) 230 c 250 c + _ preheating zone 90 30sec + _ reflow zone 35 5sec + _ 10 1sec + _ [lead-free soldering temperature profile]
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