TLVH431DMQDBZR,215

Overview

The TLVH431DMQDBZR is a low voltage three-terminal shunt regulator from the TLVH431 family, manufactured by NXP. It features D-Grade reference voltage tolerance of 0.75%, with a typical Vref of 1240 mV at 25 °C and IK = 10 mA. The device operates within an ambient temperature range of -40 °C to 125 °C and supports programmable output voltages up to 18 V using two external resistors. It utilizes SOT23 (TO-236AB) packaging with mirrored pinning configuration. The component is AEC-Q100 qualified for automotive applications.

Feature Summary

• AEC-Q100 Grade 1 qualification for automotive reliability
• D-Grade precision with 0.75% reference voltage tolerance
• Mirrored pinning configuration in SOT23 package
• Low output noise and high dynamic impedance stability

Applications

• Shunt regulator circuits
• Precision current limiter designs
• Precision constant current sink implementations
• Isolated feedback loops for Switch Mode Power Supplies

Procurement Notes

Verify the specific suffix 'MQ' indicates the mirrored pinning configuration required for your PCB layout, as standard versions use normal pinning. Confirm that the D-Grade tolerance meets your circuit's accuracy requirements compared to Standard or A-Grades. Ensure the operating temperature range of -40 °C to 125 °C aligns with your system's thermal environment. Check for any recent product change notices regarding the manufacturing site code marking.

Selection Notes

Select this part when automotive qualification and tight voltage tolerance are critical. The mirrored pinout requires distinct footprint design compared to standard TLVH431 variants. Consider the thermal resistance characteristics if high cathode currents near 70 mA are expected. Verify compatibility with existing resistor divider networks for the desired output voltage setting between 1.24 V and 18 V.

Part Context

This component belongs to the TLVH431 family of low voltage adjustable precision shunt regulators. It serves as a replacement for Zener diodes in on-board regulation and switching power supplies. The family includes Standard, A, and D grades with varying tolerances and temperature ranges, all sharing similar functional architectures but differing in precision and automotive qualification status.

Replacement Considerations

TLVH431DQDBZR offers identical electrical specifications and D-Grade tolerance but uses normal pinning instead of mirrored pinning. TLVH431AQDBZR provides A-Grade (1%) tolerance with normal pinning. TLVH431IDBZR offers Standard grade performance with normal pinning. Direct pin-compatible substitution requires matching the pinning configuration (normal vs. mirrored).