TL431L

UNISONIC TECHNOLOGIES CO., LTD TL431L PROGRAMMABLE PRECISION REFERENCE DESCRIPTION The UTC TL431L is a three-terminal adjustable regulator with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5V) and 20V with two external resistors. It provides very wide applications, including shunt regulator, series regulator, switching regulator, voltage reference and others. LINEAR INTEGRATED CIRCUIT FEATURES *Programmable Output Voltage to 20V. *Low Dynamic Output Impedance 0.2Ω. *Sink Current Capability of 1.0 ~ 100mA. *Equivalent full-Range Temperature Coefficient of 50ppm/ °C Typical for Operation over full Rated Operating Temperature Range. ORDERING INFORMATION Ordering Number Normal Lead Free TL431L-AB3-R TL431LK-AB3-R TL431L-AE3-R TL431LK-AE3-R TL431L-AF5-R TL431LK-AF5-R TL431L-S08-R TL431LK-S08-R TL431L-SM1-R TL431LK-SM1-R TL431L-SM1-T TL431LK-SM1-T TL431L-T92-B TL431LK-T92-B TL431L-T92-K TL431LK-T92-K TL431L-T92-R TL431LK-T92-R Note: Pin Code: K: Cathode A: Anode Pin Assignment Halogen Free 1234567 TL431LG-AB3-R R A K - - - TL431LG-AE3-R K R A - - - TL431LG-AF5-R X X K R A - TL431LG-S08-R K A A X X A A TL431LG-SM1-R K X X X X A X TL431LG-SM1-T K X X X X A X TL431LG-T92-B R A K - - - TL431LG-T92-K R A K - - - TL431LG-T92-R R A K - - - R: Reference X: No Connection 8 R R R Package SOT-89 SOT-23 SOT-25 SOP-8 MSOP-8 MSOP-8 TO-92 TO-92 TO-92 Packing Tape Reel Tape Reel Tape Reel Tape Reel Tape Reel Tube Tape Box Bulk Tape Reel MARKING (SOT-23/SOT-25) SOT-23 SOT-25 www.unisonic.com.tw Copyright © 2008 Unisonic Technologies Co., Ltd 1 of 5 QW-R103-014.F TL431L BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R103-014.F TL431L LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Cathode Voltage VKA 20 V Cathode Current Range (Continuous) IKA -100 ~ +150 mA Reference Input Current Range IREF -0.05 ~ +10 mA Operating Junction Temperature TJ 150 °C Operating Ambient Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. RECOMMENDED OPERATING CONDITIONS PARAMETER Cathode Voltage Cathode Current SYMBOL VKA IKA MIN VREF 1 TYP MAX 20 100 UNIT V mA ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified) PARAMETER SYMBOL Reference Input Voltage VREF Deviation of Reference Input Voltage ΔVREF/ΔT Over temperature (note 1) Ratio of Change in Reference Input Voltage to the Change in Cathode ΔVREF /ΔVKA Voltage Reference Input Current IREF Deviation of Reference Input Current ΔIREF/ΔT Over Full Temperature Range Minimum Cathode Current for Regulation IKA(MIN) Off-State Cathode Current IKA(OFF) TEST CONDITIONS VKA=VREF, IKA=10mA VKA=VREF, IKA=10mA 0≤TA≤70 IKA=10mA ΔVKA=10V~VREF ΔVKA=20V~10V MIN 2.450 TYP 2.50 4.5 -1.0 -0.5 1.5 0.4 0.45 0.05 0.15 MAX 2.550 17 -2.7 -2.0 4 1.2 1.0 1.0 0.5 UNIT V mV mV/V μA μA mA μA Ω IKA=10mA, R1=10kΩ, R2=∞ IKA=10mA, R1=10kΩ, R2=∞ TA=full Temperature VKA=VREF VKA=20V, VREF=0 VKA=VREF, IKA=1 ~ 100mA Dynamic Impedance ZKA f≤1.0kHz Remark: Reference voltage of ±1% tolerance is also available per customer’s request. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R103-014.F TL431L TYPICAL CHARACTERISTICS Cathode Current vs. Cathode Voltage 125 Ta=25 VKA=VREF LINEAR INTEGRATED CIRCUIT 800 Cathode Current vs. Cathode Voltage Ta=25 VKA=VREF Cathode Current (mA) 100 75 50 25 0 -25 -50 -75 -100 -2 -1 0 1 2 3 600 Cathode Current (μA) 400 IKA(min) 200 0 -200 -2 -1 0 1 2 3 Cathode Voltage (V) Cathode Voltage (V) 0 -5 -10 -15 -20 -25 -30 -35 -40 Change in Reference Input Voltage vs. Cathode voltage 7 Ta=25 Pulse Response Input and Output Voltage (V) IKA=100mA Ta=25 0 5 10 15 20 25 30 35 40 Change In Reference INput Voltage (mV) 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 Cathode Voltage (V) Time (μs) Dynamic Impedance vs. Frequency 10 2 Small Signal Voltage Amplification vs. Frequency 70 Ta=25 IKA=0mA ~ 100mA Impedance (Ω) 10 1 60 50 40 30 20 10 0 Ta=25 IKA=10mA 10 4 10 0 10 -1 Voltage Amplification (dB) 3 4 5 6 7 10 10 10 10 10 -10 3 10 10 5 10 6 10 7 Frequency (Hz) Frequency (Hz) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 5 QW-R103-014.F TL431L TEST CIRCUIT LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT VIN IOUT VOUT VIN IOUT RCL VOUT Rs Rs UTC TL431L IOUT=VREF/RS UTC TL431L RS=VREF/RCL Constant-Current Sink Current Limiting or Current Source UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R103-014.F