SC431MSKQTRT

SC431M Adjustable Shunt Regulator Features Description       The SC431M is a three terminal adjustable shunt regulator with thermal stability guaranteed over temperature. The output voltage can be adjusted to any value from 2.5V (VREF) to 30V with two external resistors. Wide operating current range 130μA to 150mA Low dynamic output impedance 0.25Ω typ. Trimmed bandgap + 0.5% Alternate for TL1431, TL431, LM431& AS431 Military temperature range Available in SOT-23-3 package, fully WEEE and RoHS compliant Applications   Linear Regulators Switching Power Supplies The SC431M has a typical dynamic output impedance of 0.25Ω. Active output circuitry provides a very sharp turn on characteristic, making the SC431M an excellent replacement for Zener diodes. The SC431M shunt regulator is available with a 0.5% voltage tolerance over TA = -55°C to +125°C and comes in a SOT-23-3 package. Typical Application Circuit Notes: 1) Set VOUT according to the following equation: 2) Choose the value for R as follows:  The maximum limit for R should be such that the cathode current, IZ, is greater than the minimum operating current (130μA) at VIN(MIN).  The minimum limit for R should be such that IZ does not exceed 150mA under all load conditions, and the instantaneous turn-on value for IZ does not exceed 200mA. Both of the following conditions must be met: (to limit instantaneous turn-on IZ) (to limit IZ under normal operating conditions) www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 1 of 10 Pin Configuration Marking Information Ordering Information Device SC431MSKQTRT (1)(2) Package SOT-23-3 Notes: (1): Only available in tape and reel packaging. A reel contains 3,000 devices. Consult factory for smaller quantities. (2): This product is fully WEEE and RoHS compliant. www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 2 of 10 Absolute Maximum Ratings Parameter Symbol Cathode Voltage Continuous Cathode Current Reference Input Current Power Dissipation at T A = 25°C SOT-23-3 Thermal Resistance SOT-23-3 Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 seconds ESD Rating (Human Body Model) Value Units VZ IZ IREF 31 150 10 V mA mA PD 0.37 W θJA 336 °C/W TA TJ TSTG TLEAD VESD -55 to +125 -55 to +150 -65 to +150 300 2 °C °C °C °C kV Notes: (1): If multiple diodes conduct in the forward direction at any instant, the sum of the currents must not exceed this rating. (2): ESD Gun return path to Ground Reference Plane (GRP) (3): Any one diode to ambient. Electrical Characteristics Unless specified: TA = 25°C. Values in bold apply over full operating ambient temperature range. Parameter Symbol Conditions Min. VREF V Z = V R E F , I Z = 10mA ( 1 ) V R E F Temp Deviation VDEV (1) Ratio of Change in V R E F to Change in V Z ΔV R E F ΔV Z Reference Voltage Max. Units 2.495 2.507 V 8 17 mV I Z = 10mA,ΔV Z =10V to V R E F -0.5 -2.7 I Z = 10mA,ΔV Z =30V to 10V -1.0 -2.0 IREF R1 = 10kΩ, R2 = ∞, I Z = 10mA ( 2 ) 0.5 4 μA I R E F Temperature Deviation IREF(DEV) R1 = 10kΩ, R2 = ∞, I Z = 10mA ( 2 ) 0.4 1.2 μA Off-State Cathode Current IZ(OFF) V R E F = 0V, V Z = 30V ( 3 ) 0.04 0.5 μA rZ f < 1kHz, V Z = V R E F I Z = 130μA to 100mA ( 1 ) 0.25 0.5 Ω IZ(MIN) VZ = VREF(1) 130 μA Reference Input Current Dynamic Output Impedance Minimum Operating Current V Z = V R E F , I Z = 10mA 2.482 Typ. mV/V Notes: (1): See Test Circuit 1 on page 4. (2): See Test Circuit 2 on page 4. (3): See Test Circuit 3 on page 4. www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 3 of 10 Test Circuits Recommended Operating Conditions Parameter Min. Max. Units Cathode Voltage, VZ Cathode Current, IZ VREF 0.130 30 150 V mA Block Diagram www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 4 of 10 Typical Characteristics Figure 1: Cathode Current vs Cathode Voltage Figure 2: Cathode Current vs Cathode Voltage Figure 3: Reference Voltage vs. Junction Temperature Figure 4: Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Junction Temperature Figure 5: Reference Input Current vs. Junction Temperature Figure 6: Off-State Cathode Current vs. Junction Temperature www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 5 of 10 Typical Characteristics (Cont.) Figure 7: Small-Signal Gain and Phase Shift vs. Frequency Figure 8: Test Circuit – Small-Signal Gain and Phase Figure 9: Stability Boundary Condition for Shunt Regulation vs. Cathode Current and Load Capacitance Figure 10: Test Circuit - Stability Figure 11: Reference Impedance vs. Frequency www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 6 of 10 www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 7 of 10 Outline Drawing – SOT-23-3 Notes: (1) Controlling dimensions are in millimeters (angles in degrees). (2) Datums and to be determined at datum plane (3) Dimensions "E1" and "D" do not include mold flash, protrusions or gate burrs. www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 8 of 10 Land Pattern – SOT-23-3 Notes: (1) This land pattern is for reference purposes only. Consult your manufacturing group to ensure that your company’s manufacturing guidelines are met. (2) Reference IPC-SM-782A www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 9 of 10 www.semtech.com SC431M Final Datasheet August 1, 2017 Rev. 2.0 Page 10 of 10