TLVH431AQPK

Overview

The TLVH431AQPK is a low-voltage adjustable precision shunt regulator from Texas Instruments, designed for automotive and industrial applications. It operates within a supply voltage range of 2.5 V to 18 V and provides an adjustable output voltage from 1.24 V to 18 V. The device features an initial accuracy of ±1.5% and a temperature coefficient of 138 ppm/°C. It supports a cathode current range from 100 µA to 70 mA and functions reliably across an operating temperature range of -40°C to +125°C. Packaged in a SOT-89-3 surface-mount case, it meets AEC-Q100 qualification standards.

Feature Summary

• Automotive-grade reliability with AEC-Q100 qualification for harsh environment operation
• Wide operating current range enabling stable regulation from microampere to tens of milliamperes
• Low-voltage operation capability suitable for battery-powered and space-constrained designs

Applications

• Automotive electronic control units requiring precise voltage referencing
• Battery management systems needing accurate voltage monitoring
• Industrial power supplies utilizing shunt regulation topologies

Procurement Notes

Verify the specific suffix 'Q' confirms AEC-Q100 automotive qualification status before integration into safety-critical designs. Confirm the package marking and pinout match the SOT-89-3 mechanical outline drawing provided in the official datasheet. Ensure thermal management strategies account for the maximum operating temperature of 125°C during system validation.

Selection Notes

Select this component when automotive qualification is mandatory and low-voltage operation below standard 2.5 V references is required. Compare against TLVH431BCDBVTE4 if higher initial accuracy (0.5%) is needed, noting the trade-off in availability. Consider the SOT-89-3 footprint constraints versus SOT-23-3 alternatives like TLVH431AQDBZT for board space optimization.

Part Context

This part belongs to the TLVH431 family of low-voltage adjustable precision shunt regulators. It serves as a direct replacement for legacy TL431 devices in automotive contexts where lower voltage operation and higher reliability are prioritized. The 'Q' designation specifically indicates compliance with automotive quality standards, distinguishing it from commercial grade variants within the same functional family.

Replacement Considerations

TLVH431AQDBZT offers identical electrical performance in a smaller SOT-23-3 package. TLVH431BCDBVTE4 provides superior 0.5% accuracy but may have different supply chain availability.