TLVH431QDBZR,215

Overview

The TLVH431QDBZR,215 is a low voltage three-terminal shunt regulator from the TLVH431 family manufactured by NXP Semiconductors. It features an output voltage range between Vref (1.24 V) and 18 V, set by two external resistors. The device offers a reference voltage tolerance of 1.5% and operates within an ambient temperature range of -40 °C to +125 °C. It is AEC-Q100 qualified (Grade 1). The part is housed in a SOT23 package with normal pinning configuration.

Feature Summary

• Programmable output voltage up to 18 V using external resistors
• AEC-Q100 qualified for automotive applications
• Low output noise and typical output 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 the specific ordering suffix matches the required package type and pinning configuration. Confirm that the 1.5% reference voltage tolerance aligns with design requirements. Ensure the operating temperature range of -40 °C to +125 °C is suitable for the target environment. Check for any recent product status changes or obsolescence notices on the manufacturer's website before finalizing procurement.

Selection Notes

Select this component when an adjustable precision shunt regulator with automotive qualification is needed. The standard grade provides a 1.5% tolerance, which may be sufficient for general regulation tasks. Consider alternative grades like A-Grade or D-Grade if tighter voltage accuracy is required. Verify stability boundaries regarding load capacitance and operating current to prevent oscillation in the specific application circuit.

Part Context

This part belongs to the TLVH431 family of low voltage adjustable precision shunt regulators. The family includes various packages such as SOT23 and SOT753, and different reference voltage tolerances including Standard (1.5%), A-Grade (1%), and D-Grade (0.75%). The TLVH431QDBZR specifically denotes the Standard grade version in the SOT23 package with extended temperature coverage.

Replacement Considerations

Other parts in the TLVH431 family with similar specifications include TLVH431IDBZR and TLVH431MQDBZR. Note that MQDBZR variants feature mirrored pinning compared to the normal pinning of the QDBZR variant. Direct substitution requires verifying pin compatibility and thermal performance characteristics.