TL432AIDBVR

Overview

The TL432AIDBVR is a three-terminal adjustable shunt regulator manufactured by Texas Instruments, housed in an SOT-23-5 surface-mount package. It provides an adjustable output voltage ranging from 2.495 V to 36 V, set via two external resistors. The device features an initial accuracy of 1% at 25°C and a temperature coefficient of 92 PPM/°C. It operates within a junction temperature range of -40°C to +125°C. Key electrical specifications include a maximum cathode current of 100 mA, a minimum cathode current of 600 µA, and a typical dynamic output impedance of 0.2 Ω.

Feature Summary

• Offers precise adjustable voltage regulation with low temperature drift for stable performance across wide thermal ranges.
• Features high AC performance with low dynamic output impedance, suitable for replacing Zener diodes in switching applications.
• Provides robust thermal stability and specified heat dissipation capabilities across commercial, automotive, and military temperature grades.

Applications

• Board-level on-board regulators
• Adjustable power supplies
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix 'DBVR' confirms the SOT-23-5 package and reel packaging format. Ensure the 'A' grade designation matches the required 1% initial accuracy specification. Confirm the operating temperature range aligns with system requirements, as this variant supports extended industrial and automotive conditions. Cross-reference the manufacturer part number against official datasheets to avoid confusion with similar pinout variants like the TL431 series.

Selection Notes

Select the TL432AIDBVR when a compact SOT-23-5 footprint is required compared to the standard SOT-23-3 TL431. This component shares identical electrical characteristics with the TL431 but utilizes a different pin configuration. Choose this part for designs needing high precision (1%) and low temperature drift (92 PPM/C) in space-constrained portable or automotive electronics. Ensure the circuit design accounts for the specific pinout differences to prevent board layout errors.

Part Context

This component belongs to the TL432 family of programmable shunt regulators. It is functionally equivalent to the widely used TL431 but differs in physical package pinout arrangements, specifically utilizing DBV, DBZ, and PK packages. The TL432 series is designed to offer the same electrical performance as the TL431 while providing alternative form factors for PCB layout flexibility in modern surface-mount designs.

Replacement Considerations

Direct functional substitutes include the TL431AIDBVR, provided the schematic accommodates the pinout difference between the TL431 and TL432 families. Other compatible parts within the TL432 series may be considered if package variations are acceptable. Verify that any replacement maintains the 1% accuracy and 92 PPM/C temperature coefficient requirements.