TL431B

TL431/A/B Programmable Precision Reference Features  Programmable output voltage to 36V.  Low dynamic output impedance.  Sink current capability of 0.5 to 100mA.  Low output noise voltage  Fast turn on response SOT-23 1. Reference 2.Cathode Marking: TL431: 431 TL431A: 431A TL431B: 431B Application  3.Anode 2:Cathode (K) It provides very wide applications, including shunt 1:Reference (R) regulator,series regulator,switching regulator,voltage 3:Anode(A) reference and others. Absolute Maximum Ratings (Ta=25℃ unless otherwise specified) Symbol Parameter Rating Units 37 V VKA Cathode Voltage IKA Cathode Current Range(Continuous) -100 ~ +150 mA IREF Reference Input Current Range -0.05 ~ +10 mA PD Power Dissipation 350 mW TJ Operating Junction +150 °C TOPR Operating Ambient -40 ~ +85 °C TSTG Storage Temperature -65 ~ +150 °C Recommended Operating Conditions Symbol Parameter Min. Typ. Max. Units VKA Cathode Voltage VREF - 36 V IKA Cathode Current 1 - 100 mA www.pingjingsemi.com Revision：3.0 Feb-2020 1/4 TL431/A/B Programmable Precision Reference Electrical Characteristics (Ta=25℃ unless otherwise specified) Symbol Parameter Test Conditions TL431(1%) VREF ∆VREF ∆VREF ∆VKA IREF ∆IREF Reference Input Voltage 2.52 V TL431A(0.5%) 2.483 2.495 2.507 V TL431B(0.4%) 2.485 2.495 2.505 V 4.5 17 mV VKA=10V~VREF -1.0 -2.7 mV/V VKA=36V~10V -0.5 -2.0 mV/V 1.5 4 µA 0.4 1.2 µA VKA=VREF 0.45 1 mA VKA=36V, VREF=0 0.05 1.0 µA VKA=VREF, IKA=1~ 100mA,f≤1.0kHz 0.15 0.5 Ω VKA=VREF, IKA=10mA VKA=VREF,IKA=10mA, Over Temperature -40°C ≤TA≤+85°C the Change in Cathode Voltage IKA=10mA Reference Input Current IKA=10mA, R1=10kΩ, R2=∞ Deviation of Reference Input Current Over Full IKA=10mA, R1=10kΩ, R2=∞, Temperature Range IKA(MIN) Minimum Cathode Current for Regulation IKA(OFF) Off-State Cathode Current ZKA 2.495 Deviation of Reference Input Voltage Ratio of Change in Reference Input Voltage to Dynamic Impedance www.pingjingsemi.com Revision：3.0 Feb-2020 Min. Typ. Max. Unit -25°C ≤TA≤+85°C 2.47 2/4 TL431/A/B Programmable Precision Reference Typical Characteristic Curves Cathode Current vs. Cathode Voltage Change In Reference Input Voltage (mV) Cathode Current (μA) 75 50 25 0 -25 -50 -75 -100 -2 0 -5 -1 0 1 2 Cathode Voltage (V) Change in Reference Input Voltage vs. Cathode Voltage IKA=10mA TA=25°C -25 -30 -35 15 20 25 30 Cathode Voltage (V) www.pingjingsemi.com Revision：3.0 Feb-2020 35 400 IKA(MIN ) 200 0 -1 0 1 2 Cathode Voltage (V) 3 Pulse Response -20 10 600 7 -15 5 TA=25°C VKA=VREF -200 -2 3 -10 -40 0 Cathode Current vs. Cathode Voltage 800 TA=25°C 125 V =V KA REF 100 Input and Output Voltage (V) Cathode Current (mA) 150 40 6 TA=25°C 5 4 3 2 1 0 -1 -1 0 1 2 3 4 Time (µs) 5 6 7 3/4 TL431/A/B Programmable Precision Reference Package Outline SOT-23 0.8 Max. A 0.900 1.025 1.150 A1 0.000 0.050 0.100 b c D 0.300 0.080 2.800 0.400 0.115 2.900 0.500 0.150 3.000 E 1.200 1.300 1.400 HE 2.250 2.400 2.550 e 1.800 1.900 2.000 0.550REF L1 L 0.300 0.500 θ 0o 8o 2.2 Typ. 0.8 1.0 Min. 1.0 Dimensions in millimeter Symbol 1.9 SOT-23 Recommended soldering pad Ordering Information Device Package Shipping TL431/A/B SOT-23 3000PCS/Reel&Tape www.pingjingsemi.com Revision：3.0 Feb-2020 4/4