CYStech Electronics Corp. Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 1/7 Adjustable Precision Shunt Regulators TL431M3 SOT-89 Description The TL431M3 series are three-terminal adjustable regulators with guaranteed thermal stability over applicable temperature range. The output voltage may be set to any value between VREF (approximately 2.495 volts) and 36 volts with two external resistors. These devices have a typical dynamic output impedance of 0.15Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications. Features • Programmable output voltage • Temperature coefficient is 50ppm/°C typical • Temperature compensated for operation over full temperature range • Low output noise voltage • Fast turn on response Classification Rank VREF A B C 2.495±0.5% 2.495±1% 2.495±2% Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Characteristics Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation Operating Temperature Range Storage Temperature Range TL431M3 Symbol VKA IK IREF PD Topr Tstg Value 36 -100~+150 -0.05~+10 1 -40~+85 -65~+150 Unit V mA mA W °C °C CYStek Product Specification Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 2/7 CYStech Electronics Corp. Functional Block Diagram & Symbol Functional Block Diagram : Symbol : Cathode Cathode Reference + - Reference VREF Anode Anode Test Circuits IN II VZ IREF II IN R1 IZ VREF Fig1. Test Circuit for VZ=VREF VZ IN VZ IREF IZ R2 VREF Fig 2. Test Circuit for VZ>VREF Note : VZ=VREF(1+R1/R2)+IREFxR1 Fig3. Test Circuit for Off-State Current Electrical Characteristics ( Ta=25°C unless otherwise specified ) Characteristics Symbol Test Conditions Reference Input Voltage TL431A VREF VKA=VREF, IK=10mA TL431B TL431C V =V , I =10mA Deviation of Reference Input Voltage VREF(dev) KA REF K Over-Temperature (Note) Tmin≤Ta≤Tmax IK=10mA, Ratio of Change in Reference Input ΔVREF / ΔVKA=10V~VREF Voltage to the Change in Cathode ΔVKA IK=10mA, Voltage ΔKKA=36V~10V IK=10mA, R1=10kΩ, Reference Input Current IREF R2=∞ Deviation of Reference Input Current I =10mA, R1=10kΩ, IREF(dev) K Over Full Temperature Range R2=∞, Ta=Full Range Minimum Cathode Current for IK(min) VKA=VREF Regulation Off-State Cathode Current IK(off) VKA=36V, VREF=0 VKA=VREF, f≤1.0KHz |ZKA| Dynamic impedance IK=1 to 100mA Min Typ Max Unit 2.483 2.495 2.507 2.470 2.495 2.520 V 2.445 2.495 2.545 - 4.5 17 mV - -1.0 -2.7 - -0.5 -2.0 - 1.5 4 μA - 0.4 1.2 μA - 0.45 1.0 mA - 0.05 1.0 μA - 0.15 0.5 Ω mV/ V Note : Tmin=0℃, Tmax=70℃ TL431M3 CYStek Product Specification Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 3/7 CYStech Electronics Corp. Characteristic Curves CATHODE C URR ENT vs C ATHODE VOLTAGE CATHODE C URR ENT vs C ATHODE VOLTAGE 150 800 I K - C OTHODE C UR R ENT ( u A) I K - C OTHODE C UR R ENT (mA) 125 100 75 50 25 0 -25 -50 -75 -100 700 600 500 400 300 200 100 0 -100 -200 -2 -1 0 1 2 3 -1 -0. 5 V A K - C ATHODE VOLTAGE (V) 2. 52 350 2. 515 300 Vre f - REF ERENC E INP UT CUR RENT (nA) Vre f - R EF ER ENC E INP UT VOLTAGE (mV) 0. 5 1 1. 5 2 2. 5 3 R EF ERENC E INP UT C URR ENT vs AMB IENT TEMP ER ATUR E R EF ERENC E INP UT VOLTAGE vs AMB IENT TEMP ER ATURE 2. 51 2. 505 2. 5 2. 495 2. 49 2. 485 2. 48 250 200 150 100 50 0 -50 -25 0 25 50 75 100 AMB IENT TEMP ER ATUR E(℃ ) TL431M3 0 V AK - C ATHODE VOLTAGE ( V) 125 0 25 50 75 100 125 AMB IENT TEMP ER ATUR E(℃ ) CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 4/7 Characteristic Curves(Cont.) DYNAMIC IMP EDANC E vs F R EQUENC E CATHODE VOLTAGE vs R EF ER ENC E INP UT VOLTAGE 100 Z K A - DYNAMIC IMP EDANC E (Ω) ΔVre f - R EF ER ENC E INP UT VOLTAGE (mV) 0 -5 -10 -15 -20 -25 -30 0 5 10 15 20 25 30 35 10 1 0. 1 40 V KA - C ATHODE VOLTAGE (V) 1 10 100 1000 f - F R EQUENC E (KHz ) OP EN-LOOP VOLTAGE GAIN vs F R EQUENCY OP EN-LOOP VOLTAGE GAIN (dB ) 40 30 20 10 0 1 10 100 1000 f - F R EQUENC Y (KHz ) Ordering Information Device TL431M3 TL431M3 Package SOT-89 (Pb-free) Shipping Marking 1000 pcs / Tape & Reel 431 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 5/7 Reel Dimension Carrier Tape Dimension TL431M3 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 6/7 Recommended wave soldering condition Product Pb-free devices Peak Temperature 260 +0/-5 °C Soldering Time 5 +1/-1 seconds Recommended temperature profile for IR reflow Profile feature Average ramp-up rate (Tsmax to Tp) Preheat −Temperature Min(TS min) −Temperature Max(TS max) −Time(ts min to ts max) Time maintained above: −Temperature (TL) − Time (tL) Peak Temperature(TP) Time within 5°C of actual peak temperature(tp) Ramp down rate Time 25 °C to peak temperature Sn-Pb eutectic Assembly Pb-free Assembly 3°C/second max. 3°C/second max. 100°C 150°C 60-120 seconds 150°C 200°C 60-180 seconds 183°C 60-150 seconds 240 +0/-5 °C 217°C 60-150 seconds 260 +0/-5 °C 10-30 seconds 20-40 seconds 6°C/second max. 6 minutes max. 6°C/second max. 8 minutes max. Note : All temperatures refer to topside of the package, measured on the package body surface. TL431M3 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502M3 Issued Date : 2003.04.02 Revised Date : 2013.08.12 Page No. : 7/7 SOT-89 Dimension Marking: A 2 1 3 Device name Date Code 431 431 □□□□ H C D B Style: Pin 1. Reference 2. Anode 3. Cathode E I F 3-Lead SOT-89 Plastic Surface Mounted Package CYStek Package Code: M3 G Inches Min. Max. 0.1732 0.1811 0.1551 0.1673 0.0610 REF 0.0906 0.1024 0.0126 0.0205 DIM A B C D E Millimeters Min. Max. 4.40 4.60 3.94 4.25 1.55 REF 2.30 2.60 0.32 0.52 DIM F G H I Inches Min. Max. 0.0591 TYP 0.1181 TYP 0.0551 0.0630 0.0138 0.0173 Millimeters Min. Max. 1.50 TYP 3.00 TYP 1.40 1.60 0.35 0.44 Notes: 1.Controlling dimension: millimeters. 2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.If there is any question with packing specification or packing method, please contact your local CYStek sales office. Material: • Lead: Pure tin plated. • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0. Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek. • CYStek reserves the right to make changes to its products without notice. • CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. TL431M3 CYStek Product Specification