TAIWAN SEMICONDUCTOR TS432Adjustable Precision Shunt Regulator Pin Definition General Description TS432 series is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage may be set to any value between VREF (approximately 1.24V) and 18V with two external resistors. TS432 series has a typical output impedance of 0.050. Active output circuitry provides a very sharp turn-on characteristic, making TS432 series excellent replacement for zener diode in many applications. Features • Precision Reference Voltage TS432A - 1.24V±1% TS432B - 1.24V±0.5% • Minimum Cathode Current for Regulation: 20qA(typ.) • Equivalent Full Range Temp. Coefficient: 50ppm/ °C • Programmable Output Voltage up to 18V • Fast Turn-On Response • Sink Current Capability of 80qA to 100mA • Low Dynamic Output Impedance: 0.05Q • Low Output Noise • Halogen Free Available Ordering Information Part No. Note: Where x denotes voltage tolerance A: ±1%, B: ±0.5% “G” denotes for Halogen free products Block Diagram Applications • Voltage Monitor • Delay Timer • Constant -Current Source/Sink • High-Current Shunt Regulator • Crow Bar • Over-Voltage / Under-Voltage Protection Absolute Maximum Ratings (TA=25oC unless otherwise noted) Note 1: Voltage values are with respect to the anode terminal unless otherwise noted. Document Numbe

TS432Adjustable Precision Shunt Regulator RoHS COMPLIANT Recommended Operating Condition * The deviation parameters AVREF and AIREF are defined as difference between the maximum va ue and minimum value Obtained over the full operating ambient temperature range that applied. * The average temperature coefficient of the reference input voltage, aVREF is defined as: ( <AVref> Where: T2-T1 = full temperature change. aVREF can be positive or negative depending on whether VREFMin. or VREFMax occurs at the lower ambient temperature. Example: AVREF=7.2mV and the slope is positive, VREF=1.241V at 25°C,...

TS432 Adjustable Precision Shunt Regulator Test Circuits Figure 3: Off-State Current Additional Information – Stability When TS432 series is used as a shunt regulator, there are two options for selection of CL, are recommended for optional stability: A) No load capacitance across the device, decouple at the load. B) Large capacitance across the device, optional decoupling at the load. The reason for this is that TS432 series exhibits instability with capacitances in the range of 10nF to 1µF (approx.) at light cathode current up to 3mA(typ). The device is less stable the lower the cathode voltage...

TS432 Adjustable Precision Shunt Regulator Applications Examples (Continue) Figure 6: Shunt Regulator Figure 7: High Current Shunt Regulator Figure 8: Series Pass Regulator Figure 9: Constant Current Source Figure 10: TRIAC Crowbar

TAIWAN SEMICONDUCTOR (®RoHS Pb^cc COMPLIANT TS432 Adjustable Precision Shunt Regulator Applications Examples (Continue) Figure 12: Single-Supply Figure 13: Constant Current Sink Figure 14: Delay Timer Comparator with Temperature-Compensated Threshold

TS432 Adjustable Precision Shunt Regulator Typical Performance Characteristics Test Circuit for Voltage Amplification Figure 15: Small-Signal Voltage Gain and Phase Shift vs. Frequency Test Circuit for Reference Impedance Figure 16: Reference Impedance vs. Frequency

TS432 Adjustable Precision Shunt Regulator Typical Performance Characteristics Test Circuit for Curve A The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the initial VKA and IKA conditions with CL=0. VBATT and CL then were adjusted to determine the ranges of stability. Test Circuit for Curve B, C and D Figure 17: Stability Boundary Condition Test Circuit for Pulse Response, Ik=1mA Figure 18: Pulse Response

TS432 Adjustable Precision Shunt Regulator Electrical Characteristics Figure 20: Reference Current vs. Temperature Figure 19: Reference Voltage vs. Temperature Figure 21: Cathode Current vs. Cathode Voltage

TAIWAN SEMICONDUCTOR (®RoHS Pb^cc COMPLIANT TS432 Adjustable Precision Shunt Regulator SOT-23 Mechanical Drawing Unit: Millimeters Marking Diagram 2 = Device Code X = Tolerance Code (A = ±1%, B = ±0.5%) Y = Year Code M = Month Code for Halogen Free Product

TAIWAN SEMICONDUCTOR (®RoHS Pb^cc COMPLIANT TS432 Adjustable Precision Shunt Regulator TO-92 Mechanical Drawing Unit: Millimeters X = Tolerance Code (A = ±1%, B = ±0.5%) Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr

TAIWAN SEMICONDUCTOR TS432 Adjustable Precision Shunt Regulator TO-92 Ammo Pack Mechanical Drawing Tape Dimension

TS432 Adjustable Precision Shunt Regulator Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use...