TLVH431NAQDBZR-QR

Overview

The TLVH431NAQDBZR-QR is a three-terminal adjustable precision shunt regulator from the Nexperia TLVH431N-Q family, designed for automotive applications. It features an output voltage range between Vref (1.24 V) and 14 V, set by two external resistors. This A-Grade device offers a reference voltage tolerance of 1.0% at 25 °C, with a typical value of 1240 mV. The cathode current operates between 0.08 mA and 70 mA, while the cathode-anode voltage reaches a maximum of 14 V. Qualified under AEC-Q100 Grade 1, it supports an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• AEC-Q100 Grade 1 qualified for automotive use
• Adjustable output voltage up to 14 V via external resistors
• Low output noise with typical dynamic impedance of 0.1 Ω
• Active output circuitry provides sharp turn-on characteristics

Applications

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

Procurement Notes

Verify component authenticity through authorized Nexperia distributors or official channels. Confirm that the specific ordering suffix matches the required pinning configuration and temperature grade. Ensure compliance with RoHS directives and check for any recent Product Change Notifications affecting manufacturing sites or materials before finalizing procurement orders.

Selection Notes

Select this part when an automotive-grade shunt regulator with high precision is required. The A-Grade designation ensures tighter reference voltage tolerance compared to standard grades. Consider the mirrored pinning option if board layout constraints require swapping the reference and cathode pins relative to the standard SOT23 configuration.

Part Context

This component belongs to the TLVH431N-Q family of low-voltage adjustable precision shunt regulators manufactured by Nexperia. The family includes variants with different reference voltage tolerances and operating temperature ranges, all housed in the SOT23 surface-mounted package. These devices serve as active replacements for Zener diodes in various power management and signal conditioning circuits.

Replacement Considerations

TLVH431NAMQDBZR-Q

FAQ

What is the difference between normal and mirrored pinning?

Normal pinning assigns Pin 1 to REF, Pin 2 to K, and Pin 3 to A. Mirrored pinning swaps the reference and cathode positions, assigning Pin 1 to K, Pin 2 to REF, and Pin 3 to A.

How is the output voltage determined?

The output voltage is programmable between Vref and 14 V using two external resistors connected to the reference pin.