ZHT431C01L

Overview

The ZHT431C01L is an adjustable precision shunt regulator manufactured by Diodes Incorporated, housed in a TO-92 package. It provides a reference voltage of 2.5V with a tolerance of 1%. The device supports programmable output voltages between 2.5 and 20 volts using external divider resistors. Key electrical parameters include a maximum temperature coefficient of 67 ppm/°C, a dynamic output impedance of 0.75 ohms at VREF, and a minimum cathode current for regulation of 35 to 50 mA. It operates within a wide temperature range from -55°C to +125°C.

Feature Summary

• Offers excellent temperature stability and extended operating range across -55°C to +125°C
• Features low output noise and temperature compensation for full-range operation
• Provides high current sink capability ranging from 50mA to 100mA

Applications

• Series and shunt regulators
• Voltage monitors
• Over-voltage and under-voltage protection circuits
• Switch mode power supplies

Procurement Notes

Verify component authenticity through authorized channels only. Confirm the specific ordering suffix matches the required package and tolerance specifications. Review the datasheet for absolute maximum ratings and recommended operating conditions to ensure proper circuit design. Check for any end-of-life notices or product change notifications prior to finalizing procurement plans.

Selection Notes

Select this component when precise voltage referencing is required over a wide temperature spectrum. Ensure the application allows for the necessary cathode current range of 50µA to 100mA. Verify that the desired output voltage can be achieved with available resistor values within the 2.5V to 20V limit. Consider the thermal dissipation requirements if operating near maximum limits.

Part Context

The ZHT431 series serves as an advanced replacement for standard zener diodes, offering superior performance characteristics. It belongs to Diodes Incorporated's portfolio of adjustable precision shunt regulators designed for applications demanding improved accuracy and stability compared to traditional discrete components.

Replacement Considerations

This part is listed as obsolete in the provided documentation. Evaluate alternative packages such as SOT23 or SOT223 variants within the same ZHT431 family if surface mount solutions are preferred. Cross-reference with other adjustable shunt regulators ensuring similar voltage ranges and current capabilities.