TL431B

TL431B Adjustable Accurate Reference Source &   ' The TL431B is a three-terminal adjustable shunt regulator offeringexcellent temperature stability . This device has a typical dynamic output impedance of 0.2. The device can be used as a replacement for zener diodes in many applications. 1.Reference 2.Anode 3.Cathode ■ Simplified outline(SOT-89) ■ ( z The output voltage can be adjusted to 36V z Low dynamic output impedance, its typical value is 0.2 z Trapping current capability is 1 to 100mA z Low output noise voltage z Fast on -state response z The effective temperature compensation in the working range of full temperature z The typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/ ■ ''   z Shunt Regulator z High-Current Shunt Regulator z Precision Current Limiter  ■ ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) Parameter Symbol Value Cathode Voltage VKA Cathode Current Range (Continuous) IKA -100-+150 mA Reference lnput Current Range Iref 0.05-+10 mA Power Dissipation PD 500 mW Thermal Resistance from Junction to Ambient RJA 250 /W Operating Temperature Topr -25~+85  Junction Temperature TJ 150  Storage Temperature Range TSTG -65~+150  www.slkormicro.com 1 36 Unit V TL431B  ■        -.*/   "012 3!224 Parameter Reference $nput *oltage Deviation of +eference ,nput *oltage -ver )emperature (note) Ratio -f /hange in +eference lnput *oltage to the /hange in /athode *oltage Reference $nput /urrent Deviation -f +eference $nput /urrent -ver 0ull )emperature +ange Minimum /athode /urrent for +egulation Off-state /athode /urrent Dynamic $mpedance Symbol Vref ƸVref /ƸT ƸVref /ƸVKA lref Ƹlref /ƸT IKA(min) Test VKA=VREF, IKA=10mA VKA =VREF, IKA =10mA TMINTaTMAX ƸVKA =10V~VREF IKA=10mA ƸVKA =36V~10V IKA= 10mA,R1=10# R2= M'(%$) M$% T& 2.4 2.5 2.5  4.5 17 -1.0 -2.7  .V/V -0.5 -2.0 .V/V  1.5 4 A  V   mV  lKA=10mA, R1=10# R2= TA=-25 to 85ć 0.4 1.2 VKA=VREF 0.45 1.0 mA  0.05 1.0 A IKA(OFF) VKA=36V ,VREF=0 VKA=VREF, lKA=1 to 100mA ZKA f1.0#Hz Note:TMIN=1  ,TMAX=+1 www.slkormicro.com conditions 2 0.15 0.5 A   TL431B ■ SOT-89 B D A bp3 E 1 2 HE Lp 3 c bp2 w M B bp1 e1 e 0 2 4 mm scale DIMENSIONS (mm are the original dimensions) www.slkormicro.com UNIT A bp1 bp2 bp3 c D E e e1 HE Lp w mm 1.6 1.4 0.48 0.35 0.53 0.40 1.8 1.4 0.44 0.23 4.6 4.4 2.6 2.4 3.0 1.5 4.25 3.75 1.2 0.8 0.13 3