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| CYStech Electronics Corp. Adjustable Precision Shunt Regulators Spec. No. : C502N3 Issued Date : 2003.04.02 Revised Date : 2008.06.24 Page No. : 1/ 6 TL431N3 SOT-23 Description The TL431N3 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 0.2. 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 2.4950.5% B 2.4951% C 2.4952% 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 Junction Temperature Range Storage Temperature Range TL431N3 Symbol VKA IK IREF PD Topr Tj Tstg Value 37 -100~+150 -0.05~+10 300 -40~+125 -40~+150 -65~+150 Unit V mA mA mW C C C CYStek Product Specification CYStech Electronics Corp. Functional Block Diagram Functional Block Diagram : Cathode Reference VREF + Anode Spec. No. : C502N3 Issued Date : 2003.04.02 Revised Date : 2008.06.24 Page No. : 2/ 6 & Symbol 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=25C 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 TminTaTmax IK=10mA, Ratio of Change in Reference Input VREF / VKA=10V-VREF Voltage to the Change in Cathode VKA IK=10mA, Voltage KKA=36V-10V IK=10mA, R1=10k, Reference Input Current IREF R2= Deviation of Reference Input Current I =10mA, R1=10k, 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, f1.0KHz Dynamic impedance ZKA IK=1 to 100mA TL431N3 Min Typ Max Unit 2.480 2.495 2.510 2.470 2.495 2.520 V 2.445 2.495 2.545 4 -1.4 -1.0 2 0.4 0.4 0.1 0.2 17 -2.7 -2.0 4 1.2 1.0 1.0 0.5 mV mV V uA uA mA uA CYStek Product Specification CYStech Electronics Corp. Characteristic Curves C ATHODE CUR RENT vs C ATHODE VOLTAGE 150 Spec. No. : C502N3 Issued Date : 2003.04.02 Revised Date : 2008.06.24 Page No. : 3/ 6 CATHODE 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 - CATHODE 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) REF ER ENCE INP UT VOLTAGE vs AMBIENT TEMP ER ATUR E 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 ERATUR E( ) Vre f - R EF ER ENC E INP UT C URR ENT (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( ) TL431N3 CYStek Product Specification CYStech Electronics Corp. Characteristic Curves(Cont.) CATHODE 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 VKA - C ATHODE VOLTAGE (V) Z K A - DYNAMIC IMP EDANC E () 100 Spec. No. : C502N3 Issued Date : 2003.04.02 Revised Date : 2008.06.24 Page No. : 4/ 6 DYNAMIC IMP EDANC E vs F R EQUENC E Vre f - R EF ER ENC E INP UT VOLTAGE (mV) 10 1 0. 1 1 10 100 1000 f - F R EQUENC E (KHz ) OP EN-LOOP VOLTAGE GAIN vs F R EQUENCY 40 OP EN-LOOP VOLTAGE GAIN (dB ) Po wer Der atin g C u r v e 350 Po wer Dissip atio n - - - PD( mW ) 300 250 200 150 100 50 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( ) Ordering Information Device TL431N3 Package SOT-23 (Pb-free) Shipping 3000 pcs / Tape & Reel Marking 431 TL431N3 CYStek Product Specification CYStech Electronics Corp. Recommended wave soldering condition Product Pb-free devices Peak Temperature 260 +0/-5 C Spec. No. : C502N3 Issued Date : 2003.04.02 Revised Date : 2008.06.24 Page No. : 5/ 6 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 5C of actual peak temperature(tp) Ramp down rate Time 25 C to peak temperature Sn-Pb eutectic Assembly 3C/second max. 100C 150C 60-120 seconds 183C 60-150 seconds 240 +0/-5 C 10-30 seconds 6C/second max. 6 minutes max. Pb-free Assembly 3C/second max. 150C 200C 60-180 seconds 217C 60-150 seconds 260 +0/-5 C 20-40 seconds 6C/second max. 8 minutes max. Note : All temperatures refer to topside of the package, measured on the package body surface. TL431N3 CYStek Product Specification CYStech Electronics Corp. SOT-23 Dimension A L 3 B 1 2 S Spec. No. : C502N3 Issued Date : 2003.04.02 Revised Date : 2008.06.24 Page No. : 6/ 6 Marking: 431 V G 3-Lead SOT-23 Plastic Surface Mounted Package CYStek Package Code: N3 Style: Pin 1.Reference 3.Anode 2.Cathode C D K H J *: Typical DIM A B C D G H Inches Min. Max. 0.1102 0.1204 0.0472 0.0630 0.0335 0.0512 0.0118 0.0197 0.0669 0.0910 0.0005 0.0040 Millimeters Min. Max. 2.80 3.04 1.20 1.60 0.89 1.30 0.30 0.50 1.70 2.30 0.013 0.10 DIM J K L S V Inches Min. Max. 0.0034 0.0070 0.0128 0.0266 0.0335 0.0453 0.0830 0.1083 0.0098 0.0256 Millimeters Min. Max. 0.085 0.177 0.32 0.67 0.85 1.15 2.10 2.75 0.25 0.65 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 CYCtek sales office. Material: * Lead: 42 Alloy; solder 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. TL431N3 CYStek Product Specification |
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