TLVH431CDBVT

Overview

The TLVH431CDBVT is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a cathode voltage range of 2.5 V to 18 V and provides an adjustable output voltage from 1.24 V to 18 V using external resistors. The device features a typical initial accuracy of 1.5% and a maximum temperature coefficient of 138 ppm/°C. It supports a sink current up to 70 mA with a minimum operating current of 100 µA. The component is housed in a SOT-23-5 surface-mount package and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability via external resistor divider
• Low operating current suitable for power-constrained designs
• High precision with guaranteed temperature stability over the full operating range

Applications

• Battery chargers
• Switch mode power supplies
• Data acquisition systems
• Energy management circuits

Procurement Notes

Verify the specific suffix (e.g., G4, E4) against the manufacturer's official documentation to confirm pinout compatibility and RoHS status. Confirm availability as some variants may be discontinued or have limited supply. Ensure the selected package matches the PCB footprint requirements. Cross-reference the datasheet revision date to ensure all electrical parameters align with current design specifications.

Selection Notes

Select this component when a low-cost, space-saving shunt reference is required for low-voltage applications. The SOT-23-5 package offers a compact solution for space-constrained designs. Consider the 1.24 V internal reference threshold and the 18 V maximum cathode voltage limit. Evaluate the 1.5% initial accuracy against system tolerance requirements. Ensure the thermal environment stays within the specified -40°C to +125°C operational range.

Part Context

The TLVH431 series belongs to Texas Instruments' family of low-voltage adjustable precision shunt regulators. It serves as a cost-effective alternative to traditional Zener diodes, offering superior temperature stability and lower dynamic impedance. The device integrates a bandgap reference and error amplifier to maintain precise regulation. It is widely used in portable electronics and industrial control systems where power efficiency and size are critical factors.

Replacement Considerations

TLVH431CDBVRG4

FAQ

What is the minimum operating current for the TLVH431CDBVT?

The minimum operating current is typically 100 µA at 25°C.

How is the output voltage adjusted?

The output voltage is set between 1.24 V and 18 V using an external resistor divider network connected to the REF pin.