TLVH431AQDBZR

Overview

The TLVH431AQDBZR is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 1.25 V to 18 V and features an initial accuracy of 1%. The device supports a maximum shunt current of 80 mA with a minimum operating current of 80 µA. It has a maximum series input voltage of 20 V and a temperature coefficient of 138 PPM/C. The component functions in an ambient temperature range from -40°C to +125°C and is housed in a SOT-23-3 surface-mount package.

Feature Summary

• Provides adjustable precision voltage regulation via external resistors
• Ensures high stability across wide industrial temperature ranges
• Supports low standby currents for power-sensitive applications

Applications

• Battery-powered equipment requiring precise voltage monitoring
• Portable devices utilizing low-voltage power supplies
• Industrial control systems needing reliable reference voltages

Procurement Notes

Verify the specific suffix 'Q' indicates automotive qualification status per official documentation. Confirm the 'A' variant meets the required 1% initial accuracy specifications. Ensure the SOT-23-3 package matches the target PCB footprint. Cross-reference the datasheet revision to confirm material compliance and manufacturing origin details before finalizing procurement orders.

Selection Notes

Select this component when a 1% accuracy shunt regulator is required for low-voltage circuits. The 80 mA maximum current capability suits moderate load requirements. The wide temperature range makes it suitable for harsh environments. Compare against standard TLV431 variants if higher current or different accuracy is needed. Verify that the 20 V maximum input voltage aligns with the system supply rails.

Part Context

This part belongs to the TLVH431A family of low-voltage adjustable precision shunt regulators. It serves as a direct replacement for legacy three-terminal references in compact designs. The device integrates a bandgap reference and error amplifier to maintain stable output. It is designed for space-constrained applications where traditional Zener diodes lack precision.

Replacement Considerations

The TLVH431BQDBZRQ1G4 offers similar functionality with potentially different current characteristics. Standard TLV431AIDBZR provides comparable performance but may differ in maximum current ratings. Verify pinout compatibility and thermal management requirements when substituting.