ATL432AIDBZR

Overview

The ATL432AIDBZR is a three-terminal adjustable shunt regulator from Texas Instruments, housed in an SOT-23-3 package. It provides an adjustable output voltage ranging from 2.5 V to 36 V, set by two external resistors. The device features an initial accuracy of ±1% at 25°C and operates within a temperature range of -40°C to +85°C. Key electrical specifications include a typical reference voltage of 2.5 V, a maximum cathode current of 80 µA for operation, and a peak output current capability of 100 mA.

Feature Summary

• Provides precise adjustable voltage regulation via external resistor divider
• Ensures thermal stability across specified operating temperature ranges
• Features low output impedance for effective circuit performance
• Offers high initial accuracy for reliable voltage referencing

Applications

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

Procurement Notes

Verify the specific suffix 'DBZR' corresponds to the SOT-23-3 package and tape-and-reel delivery format. Confirm that the 'A' grade designation meets the required ±1% initial accuracy tolerance for your design. Ensure the -40°C to +85°C commercial temperature rating aligns with your environmental constraints, as automotive or extended industrial variants may require different part numbers.

Selection Notes

Select this component when a compact, low-cost shunt regulator is needed for voltage referencing or simple regulation tasks. It serves as a direct functional replacement for TL431 devices but utilizes a distinct pinout configuration compatible with SOT-23-3 footprints. Consider its 100 mA current limit and 36 V maximum voltage when designing circuits requiring higher power handling or wider voltage spans.

Part Context

This device belongs to the ATL43x family of precision shunt regulators. It shares identical electrical characteristics and functionality with the widely used TL431 series. The primary distinction lies in the physical pin arrangement, which differs between DBV, DBZ, and PK packages to accommodate various surface-mount layout requirements while maintaining standard shunt regulator behavior.

Replacement Considerations

The TL432AIDBZR is functionally equivalent to the TL431AIDBZR regarding electrical performance. However, designers must account for differences in pinout configurations between these families. Verify that the target PCB footprint matches the ATL432 pin assignment to ensure compatibility during substitution.