omponents Marilla Street Chatsworth!"# $%!"# V KA =V REF, I KA =10mA T min Ta T max I KA=10mA, T A=full Temperature I KA=1 to 100mA, f 1.

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1 M C C omponents 2736 Marilla Street Chatsworth!"# $%!"# TL431K Features Lead Free Finish/RoHS Compliant ("P" Suffix designates RoHS Compliant. See ordering information) Epoxy meets UL 94 V- flammability rating Moisure Sensitivity Level 1 Programmable Output Voltage 36V Sink Current Capability of.1ma to 1 ma The typical value of the equivalent temperature factor in the whole temperature scope is 5 ppm/ o C Low output noise voltage and Fast turn on response The Voltage tolerance is.5% Marking Code: 431K Halogen free available upon request by adding suffix "-HF" Maximum Ratings Parameter Symbol Value Unit Cathode Voltage 37 V Cathode Current Range -1~15 ma Current Range I REF.5~1 ma Power Dissipation at 25 P D.3 W Operating Temperature T opr Storage Temperature Range T STG Recommended Operating Conditions Parameter Sym Min Max Unit Cathode Voltage V REF 36 V Cathode Current Range 1. 1 ma Electrical 25 C Unless Otherwise Specified Parameter Sym Min Typ Max Test conditions Voltage Deviation of reference input voltage Ratio of Change in Voltage to the Change in Cathode Voltage Current Deviation of Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current 2.482V 2.5V 2.58V / T 4.5mV 17mV =1V / =36V 1V I ref 1.5µA 4.µA I ref/ T.4µA 1.2µA A(min). 45mA 1.mA A=1mA, R 1=1K R 2= A=1mA, R 1=1K R 2= T A=full Temperature A(off).5 µa.5µa =4V, V REF=V Dynamic Impedance Z KA.15.5 =V REF, A =1mA =V REF, A =1mA T min Ta T max A=1 to 1mA, f 1.KHz Programmable Precision Regulator F A E D G H J K C INCHES MM DIM MIN MAX MIN MAX NOTE A B C D E F G H J K B Suggested Solder Pad Layout SOT-23 DIMENSIONS (A) ANODE 2. (R) REFERENCE 3. (K) CATHODE inches mm Revision: B 1 of 6 213/1/1

2 M C C TL431K Figure 1. Test Circuit for VKA = Vref Figure 2. Test Circuit for VKA > Vref Figure 3. Test Circuit for Ioff Input Input R1 I ref Input I off R2. 1 R1 R2. I ref R1 APPICATION INFORMATION 1. Shunt Regulator Note A : R Should provide cathode current 1mA to the TL431 at minimum V I(BATT) 2. Output Control of a Three-Terminal Fixed Regulator 2 of 6 Revision: B 213/1/1

3 TL431K M C C 3. High-Current Shunt Regulator 4. Efficient 5-V Precision Regulator NOTE A : R B Should provide cathode current 1mA to the TL Precision Current Limiter 6. Precision Constant-Current Sink Revision: B 3 of 6 213/1/1

4 TL431K 15 Cathode Current versus Cathode Voltage M C C, CATHODE CURRENT (ma) = = , CATHODE VOLTAGE (V) 8 Cathode Current versus Cathode Voltage KA KA, CATHODE CURRENT (μa) A(min) ref = = , CATHODE VOLTAGE (V) 26 Voltage versus Ambient Temperature Test Circuit for =, REFERENCE INPUT VOLTAGE (mv) = =1mA , AMBIENT TEMPERATURE ( ) Revision: B 4 of 6 213/1/1

5 TL431K M C C, REFERENCE INPUT VOLTAGE (mv) Change in Voltage versus Cathode Voltage =1mA = , CATHODE VOLTAGE (V) Test Circuit for = (1+R1/R2)+R1*I ref 3. Current versus Ambient Temperature I ref, REFERENCE INPUT CURRENT (μa) =1mA R 1 =1KΩ , AMBIENT TEMPERATURE ( ) Test Circuit for I ref 4 Off-State Cathode Current versus Ambient Temperature I off, OFF-STATE CATHODE CURRENT (na) =36V =V , AMBIENT TEMPERATURE ( ) Test Circuit for I off Revision: B 5 of 6 213/1/1

6 M C C Ordering Information : Device Part Number-TP Packing Tape&Reel;3Kpcs/Reel Note : Adding "-HF" suffix for halogen free, eg. Part Number-TP-HF ***IMPORTANT NOTICE*** Corp. reserves the right to make changes without further notice to any product herein to make corrections, modifications, enhancements, improvements, or other changes. Corp. does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights,nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Corp. and all the companies whose products are represented on our website, harmless against all damages. ***LIFE SUPPORT*** MCC's products are not authorized for use as critical components in life support devices or systems without the express written approval of Corporation. ***CUSTOMER AWARENESS*** Counterfeiting of semiconductor parts is a growing problem in the industry. (MCC) is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. MCC strongly encourages customers to purchase MCC parts either directly from MCC or from Authorized MCC Distributors who are listed by country on our web page cited below. Products customers buy either from MCC directly or from Authorized MCC Distributors are genuine parts, have full traceability, meet MCC's quality standards for handling and storage. MCC will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. MCC is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. 6 of 6 Revision: B 213/1/1