CYStech Electronics Corp. Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 1/8 Adjustable Precision Shunt Regulators TL431A3 Description TO-92 The TL431A3 series are three-terminal adjustable regulators with guaranteed thermal stability over applicable temperature ranges. 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 0.2Ω. 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 • Pb-free package Classification Rank VREF A B C 2.495±0.5% 2.495±1% 2.495±2% Ordering Information Device TL431A3-A-BK-G TL431A3-B-BK-G Rank A TL431A3-C-BK-G C TL431A3-A-TB-G A TL431A3-B-TB-G B TL431A3-C-TB-G C TL431A3 Package Shipping 1000 pcs/ bag, 10 bags/box, 10boxes/carton B TO-92 (Pb-free lead plating and halogen-free package) 2000 pcs / Tape & Box CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 2/8 Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Characteristics Symbol VKA IK IREF PD PD RθJA RθJC Topr Tj Tstg Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation @ TA=25℃ Power Dissipation @ TC=25℃ Thermal Resistance, Junction to Ambient Thermal Resistance, Junction to Case Operating Temperature Range Junction Temperature Range Storage Temperature Range Value 37 -100~+150 -0.05~+10 700 1.5 178 83 -40~+125 -40~+150 -65~+150 Unit V mA mA mW W °C/W °C/W °C °C °C 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 TL431A3 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 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 3/8 Electrical Characteristics ( Ta=25°C unless otherwise specified ) Characteristics Symbol Test Conditions Min Typ Max Unit Reference Input Voltage TL431A 2.480 2.495 2.510 VREF VKA=VREF, IK=10mA 2.470 2.495 2.520 V TL431B TL431C 2.445 2.495 2.545 V =V , I =10mA Deviation of Reference Input 4 17 mV VREF(dev) KA REF K Voltage Over-Temperature Tmin≤Ta≤Tmax IK=10mA, -1.4 -2.7 mV/V Ratio of Change in Reference ΔVREF / ΔVKA=10V-VREF Input Voltage to the Change in ΔVKA IK=10mA, Cathode Voltage -1.0 -2.0 mV/V ΔKKA=36V-10V IK=10mA, R1=10kΩ, 0.63 4 μA Reference Input Current IREF R2=∞ Deviation of Reference Input I =10mA, R1=10kΩ, Current Over Full Temperature IREF(dev) K 0.4 1.2 μA R2=∞, Ta=Full Range Range Minimum Cathode Current for IK(min) VKA=VREF 0.33 0.5 mA Regulation Off-State Cathode Current IK(off) VKA=36V, VREF=0 0.1 1.0 μA VKA=VREF, f≤1.0KHz Dynamic impedance ZKA 0.2 0.5 Ω IK=1 to 100mA TL431A3 CYStek Product Specification Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 4/8 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(℃ ) TL431A3 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. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 5/8 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 - REF 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 1 40 V KA - C ATHODE VOLTAGE (V) 1000 Po wer Der atin g C u r v e 800 Po wer Dissip atio n - - - P D ( mW ) 40 OP EN-LOOP VOLTAGE GAIN (dB ) 100 f - F R EQUENC E (KHz ) OP EN-LOOP VOLTAGE GAIN vs F R EQUENCY 30 20 10 700 600 500 400 300 200 100 0 0 1 10 100 f - F R EQUENC Y (KHz ) TL431A3 10 1000 0 50 100 150 200 Am b ien t Tem p er atu r e- - - TA( ℃) CYStek Product Specification Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 6/8 CYStech Electronics Corp. TO-92 Taping Outline H2 H2A H2A H2 D2 A L H3 H4 H L1 H1 D1 F1F2 T2 T T1 DIM A D D1 D2 F1,F2 F1,F2 H H1 H2 H2A H3 H4 L L1 P P1 P2 T T1 T2 W W1 - TL431A3 P1 P Item Component body height Tape Feed Diameter Lead Diameter Component Body Diameter Component Lead Pitch F1-F2 Height Of Seating Plane Feed Hole Location Front To Rear Deflection Deflection Left Or Right Component Height Feed Hole To Bottom Of Component Lead Length After Component Removal Lead Wire Enclosure Feed Hole Pitch Center Of Seating Plane Location 4 Feed Hole Pitch Over All Tape Thickness Total Taped Package Thickness Carrier Tape Thickness Tape Width Adhesive Tape Width 20 pcs Pitch W1 W D P2 Millimeters Min. 4.33 3.80 0.36 4.33 2.40 15.50 8.50 2.50 12.50 5.95 50.30 0.36 17.50 5.00 253 Max. 4.83 4.20 0.53 4.83 2.90 ±0.3 16.50 9.50 1 1 27 21 11 12.90 6.75 51.30 0.55 1.42 0.68 19.00 7.00 255 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 7/8 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. TL431A3 CYStek Product Specification Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2013.11.29 Page No. : 8/8 CYStech Electronics Corp. TO-92 Dimension Marking: α2 A B 1 2 3 Date Code TL 431 □□ α3 C D H I G α1 Style: Pin 1.Reference 2.Anode 3.Cathode E F 3-Lead TO-92 Plastic Package CYStek Package Code: A3 *: Typical Inches Min. Max. 0.1704 0.1902 0.1704 0.1902 0.5000 0.0142 0.0220 *0.0500 0.1323 0.1480 DIM A B C D E F Millimeters Min. Max. 4.33 4.83 4.33 4.83 12.70 0.36 0.56 *1.27 3.36 3.76 DIM G H I α1 α2 α3 Inches Min. Max. 0.0142 0.0220 *0.1000 *0.0500 *5° *2° *2° Millimeters Min. Max. 0.36 0.56 *2.54 *1.27 *5° *2° *2° 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 plating. • 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. TL431A3 CYStek Product Specification