2015. 4. 01 1/7 revision no : 4 cathode (k) anode (a) reference (r) 2.5v ref + - reference (r) anode (a) cathode (k) programmable precision references the kia431 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. these devices exhibit a wide operating current range of 1.0 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 kia431 series operates as a shunt regulator, it can be used as either a positive or negative voltage reference. features h low dynamic output impedance : 0.22 ? (typ.). h sink current capability of 1.0 to 100ma. h equivalent full-range temperature coefficient of 50ppm/ ? (typ.). h temperature compensated for operation over full rated operating temperature range. h minimum cathode current for regualation : 600 a(max). line up semiconductor technical data KIA431AC/bc series bipolar linear integrated circuit pin configuration (sot-23) 3 3 2 2 1 1 1. cathode 2. ref 3. anode top view block diagram type no. package marking KIA431ACp to-92 - kia431bcp - KIA431ACf sot-89 3e kia431bcf 3f KIA431ACm sot-23 4ac kia431bcm 4bc
2015. 4. 01 2/7 KIA431AC/bc series revision no : 4 ordering information kia431 pb-free / halogen-free packing specification i min specification package type v ref tolerance packing specification to-92 at : taping of ammo pack type sot-89 rtf : rtf type sot-23 rtk : rtk type maximum ratings (ta=25 ? ) (full operating ambient temperature range applies unless otherwise noted.) note1) package mounted on 99.5% alumina 10 ? 8 ? 0.6mm item v ref tolerance code i min code package code pb-free / halogen-free code tolerance code spec. code package p pb-free kia431 a ? 1.0% c 0.6ma(max) p to-92 h halogen-free b ? 0.5% f sot-89 m sot-23 characteristic symbol rating unit cathode to anode voltage v ka 37 v cathode current range, continuous i k -100 q 150 ma reference input current range, continuous i ref -0.05 q 10 ma operating junction temperature t j 150 ? operating temperature t opr -40 q 85 ? storage temperature t stg -65 q 150 ? total power dissipation kia431p p d 700 mw kia431f 800 kia431m (note1) 350 thermal resistance kia431p r ? ja 179 ? /w kia431f 156 kia431m (note1) 357
2015. 4. 01 3/7 KIA431AC/bc series revision no : 4 electrical characteristics (ta=25 ? ) characteristics symbol test circuit test condition min. typ. max. unit reference input voltage kia431a v ref figure 1 v ka =v ref , i k =10ma 2.470 2.495 2.520 v kia431b 2.4825 2.495 2.5075 v reference input voltage deviation over temperature range v ref figure 1 (note 1) v ka =v ref , i k =10ma - 7.0 30 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 ta=25 ? i ref figure 2 i k =10ma, r1=10k ? , r2= ? 0.5 1.8 2.5 a ta=t opr - - 6.5 reference input current deviation over temperature range i ref figure 2 i k =10ma, r1=10k ? , r2= ? - 0.8 2.5 a minimum cathode current for regulation i min figure 1 v ka =v ref - 300 600 a off-state cathode current i off figure 3 v ka =36v, v ref =0v - 2.6 1000 na dynamic impedance z ka figure 1 (note 2) v ka =v ref , i k =1.0 q 100ma, f " 1.0khz - 0.22 - ?
2015. 4. 01 4/7 KIA431AC/bc series revision no : 4 input figure 1-test circuit for v ka = v ref off i ka v input figure 3-test circuit for i off 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: vka |z ka | = ik 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. 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.
2015. 4. 01 5/7 KIA431AC/bc series revision no : 4 -2.0 k i - v cathode voltage v ka (v) cathode voltage v ka (v) -1.0 3.0 0 1.0 2.0 -100 50 -50 cathode current i k (ma) 0 ka 100 150 1.0m 100k 10k 10m 1.0k frequency f (hz) zka - f 3.0 5.0 0 voltage swing (v) 16 12 8.0 20 4.0 time t ( s) 0 pulse response 100 10 0.1 1.0 800 600 k ka 0 cathode current i ( a) -200 2.0 1.0 0 3.0 -1.0 i - v k 200 400 v =v ta=25 c ka ref ref ka ta=25 c v =v dynamic impedance zka ( ? ) i =1.0ma~100ma ta=25 c k frequency f (hz) g vo - f 0 -10 open loop voltage gain g vo (db) 10 20 30 40 50 60 1.0k 10m 10k 100k 1.0m i =10ma ta=25 c k 0 2.0 1.0 ta=25 c output input cathode voltage v ka (v) 40 20 010 -24 change in reference input -32 -16 0 -8.0 voltage v (mv) ref 30 ta=25 c k i =10ma v ref - v ka allowable power dissipation p d (mw) 0 100 0 p d - ta 25 50 75 100 125 150 175 200 300 400 500 600 700 800 1000 900 ambient temperature ta ( c ) kia431f kia431p kia431m
2015. 4. 01 6/7 KIA431AC/bc series revision no : 4 n 1.00 m 0.45 max n m c e c e l f f h g k ja b 3 2 1 d 2.30 0.55 max 14.00 0.50 0.45 0.85 1.27 1.00 0.45 3.70 max 4.80 max 4.70 max l k j h g f d c b a millimeters dim to-92 + _ 2. anode 1. reference 3. cathode dim a b d e g h k 4.70 max 2.50 0.20 1.70 max 0.45+0.15/-0.10 4.25 max 1.50 0.10 0.40 typ 1.75 max 0.75 min 0.5+0.10/-0.05 sot-89 c j g d 123 2. anode a c k j f millimeters h 1. reference 3. cathode b e ff d + _ + _ heat sink is common to (anode) 2 dim millimeters sot-23 a b c d e 2.93 0.20 1.30+0.20/-0.15 0.40+0.15/-0.05 2.40+0.30/-0.20 g 1.90 h j k l m n 0.95 0.13+0.10/-0.05 0.00 ~ 0.10 0.55 q 0.1 max 0.20 min 1.00+0.20/-0.10 m j k e 1 2 3 h g a n c b d 1.30 max ll pp p7 + _ q 1. cathode 2. ref 3. anode 3 21
2015. 4. 01 7/7 KIA431AC/bc series revision no : 4 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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