TLVH431NQDBZR-QR

Overview

The TLVH431NQDBZR-QR is a three-terminal adjustable precision shunt regulator from the Nexperia TLVH431N-Q family. It provides an output voltage range between Vref (1.24 V) and 14 V, set by two external resistors. The device features a standard reference voltage tolerance of 1.5% and operates within a temperature range of -40 °C to +125 °C. It is qualified according to AEC-Q100 Grade 1 for automotive applications. Key electrical parameters include a cathode current capability of 0.08 mA to 70 mA, a typical dynamic impedance of 0.1 Ω, and a maximum cathode-anode voltage of 14 V.

Feature Summary

• Qualified according to AEC-Q100 Grade 1 for automotive use
• Programmable output voltage up to 14 V via external resistors
• Low output noise with typical dynamic impedance of 0.1 Ω
• Sink current capability ranging from 0.08 mA to 70 mA

Applications

• Shunt regulator
• Precision current limiter
• Precision constant current sink
• Isolated feedback loop for Switch Mode Power Supply (SMPS)

Procurement Notes

Verify that the specific ordering suffix matches the required pinning configuration, as the 'MQ' variant utilizes mirrored pinning compared to the standard version. Confirm the component meets AEC-Q100 Grade 1 qualification requirements if intended for automotive deployment. Ensure the selected package type aligns with the PCB footprint design specifications provided in the datasheet.

Selection Notes

Select this component when an adjustable shunt regulator with automotive qualification is required. The standard 1.5% reference voltage tolerance distinguishes it from the higher-precision A-grade variants. Consider the thermal resistance characteristics relative to the mounting method, such as FR4 or ceramic PCBs, to ensure operation remains within the specified junction temperature limits under load.

Part Context

This part belongs to the TLVH431N-Q family of low-voltage adjustable precision shunt regulators manufactured by Nexperia. The family includes various grades and pinning configurations to support different automotive and commercial design needs. The Q-suffix indicates AEC-Q100 qualification, while the DBZR suffix denotes the SOT23 surface-mounted package format used for compact circuit board layouts.

Replacement Considerations

TLVH431NAQDBZR-QR

FAQ

What is the difference between normal and mirrored pinning in this family?

Normal pinning assigns Pin 1 to REF, Pin 2 to K, and Pin 3 to A. Mirrored pinning, found in types ending with MQDBZR, assigns Pin 1 to K, Pin 2 to REF, and Pin 3 to A.

How is the output voltage determined for this regulator?

The output voltage is set by two external resistors connected to the reference pin, allowing adjustment between approximately 1.24 V and 14 V.