TL431A3

CYStech Electronics Corp. Adjustable Precision Shunt Regulators Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2008.10.09 Page No. : 1/6 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 2.495±0.5% B 2.495±1% C 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 @ 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 TL431A3 Symbol VKA IK IREF PD PD RθJA RθJC Topr Tj Tstg 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 CYStek Product Specification CYStech Electronics Corp. Functional Block Diagram & Symbol Functional Block Diagram : Cathode Reference VREF + Anode Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2008.10.09 Page No. : 2/6 Symbol : Cathode Reference Anode Test Circuits IN IREF IZ VREF R2 II VZ IN R1 II VZ IREF IZ VREF IN VZ Fig1. Test Circuit for VZ=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 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 Dynamic impedance ZKA IK=1 to 100mA TL431A3 Min Typ 2.480 2.495 2.470 2.495 2.445 2.495 4 -1.4 -1.0 2 0.4 0.4 0.1 0.2 Max Unit 2.510 2.520 V 2.545 17 -2.7 -2.0 4 1.2 1.0 1.0 0.5 mV mV V μA μA mA μA Ω CYStek Product Specification CYStech Electronics Corp. Characteristic Curves C ATHODE C URR ENT vs C ATHODE VOLTAGE 150 Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2008.10.09 Page No. : 3/6 C ATHODE C URR ENT vs C ATHODE VOLTAGE 800 100 75 50 25 0 -25 -50 -75 -100 -2 -1 0 1 2 3 V A K - C ATHODE VOLTAGE (V) I K - C OTHODE C UR R ENT ( u A) I K - C OTHODE C UR R ENT (mA) 125 700 600 500 400 300 200 100 0 -100 -200 -1 -0. 5 0 0. 5 1 1. 5 2 2. 5 3 V AK - C ATHODE VOLTAGE ( V) R EF ERENC E INP UT VOLTAGE vs AMB IENT TEMP ER ATURE 2. 52 Vre f - R EF ER ENC E INP UT VOLTAGE (mV) 2. 515 2. 51 2. 505 2. 5 2. 495 2. 49 2. 485 2. 48 -50 -25 0 25 50 75 100 125 AMB IENT TEMP ER ATUR E(℃ ) Vre f - REF ERENC E INP UT CUR RENT (nA) 350 300 250 200 150 100 50 0 R EF ERENC E INP UT C URR ENT vs AMB IENT TEMP ER ATUR E 0 25 50 75 100 125 AMB IENT TEMP ER ATUR E(℃ ) TL431A3 CYStek Product Specification CYStech Electronics Corp. Characteristic Curves(Cont.) C ATHODE VOLTAGE vs R EF ER ENC E INP UT VOLTAGE 0 -5 -10 -15 -20 -25 -30 0 5 10 15 20 25 30 35 40 V KA - C ATHODE VOLTAGE (V) Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2008.10.09 Page No. : 4/6 D YNAMIC IMP EDANC E vs F R EQUENC E 100 Z K A - D YNAMIC IMP EDANC E (Ω) ΔVre f - REF ER ENC E INP UT VOLTAGE (mV) 10 1 0. 1 1 10 100 1000 f - F R EQUENC E (KHz ) O P EN-LOOP VOLTAGE GAIN vs F R EQUENCY 40 OP EN-LOOP VOLTAGE GAIN (dB ) P o wer Der atin g C u r v e 800 Po wer Dissip atio n - - - P D ( mW ) 700 600 500 400 300 200 100 0 30 20 10 0 1 10 100 1000 f - F R EQUENC Y (KHz ) 0 50 100 150 200 Am b ien t Tem p er atu r e- - - TA( ℃) TL431A3 CYStek Product Specification CYStech Electronics Corp. TO-92 Taping Outline H2 H2 H2A H2A A D2 Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2008.10.09 Page No. : 5/6 H3 L H4 H L1 H1 F1 F2 D1 D W1 W T2 T T1 P1 P P2 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 - 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 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 TL431A3 CYStek Product Specification CYStech Electronics Corp. TO-92 Dimension Marking: Spec. No. : C502A3 Issued Date : 2003.03.26 Revised Date : 2008.10.09 Page No. : 6/6 A B 1 2 3 α2 Date Code TL 431 □□ α3 C D H I E F G α1 Style: Pin 1.Reference 2.Anode 3.Cathode 3-Lead TO-92 Plastic Package CYStek Package Code: A3 *: Typical DIM A B C D E F Inches Min. Max. 0.1704 0.1902 0.1704 0.1902 0.5000 0.0142 0.0220 *0.0500 0.1323 0.1480 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: KFC ; 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