LD29150DT25R

Overview

The LD29150DT25R is a fixed-output linear low-dropout voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 2.5V with a maximum continuous output current of 1.5A. The device operates within an input voltage range up to a maximum of 14V and features a typical dropout voltage of 0.4V at full load, with a maximum specified dropout of 0.7V at 1.5A. Key electrical parameters include a quiescent current of 180 µA, a supply current of 80 mA, and a power supply rejection ratio (PSRR) of 70dB at 120Hz. It is housed in a DPAK surface-mount package.

Feature Summary

• Provides high accuracy fixed output voltage regulation suitable for sensitive digital logic circuits
• Incorporates internal protection mechanisms against overcurrent conditions and excessive thermal stress
• Designed for efficient power management with very low ground current consumption

Applications

• Post-regulation stages for switching power supplies
• Power supply modules for computer systems
• Battery-powered electronic devices requiring stable voltage rails

Procurement Notes

Verify the specific suffix DT25R to confirm the fixed 2.5V output and DPAK packaging configuration. Ensure compatibility with the target PCB footprint for the TO-252-3 package style. Confirm RoHS3 compliance status if required by assembly specifications. Check for any recent product change notices regarding package or material updates before finalizing procurement orders.

Selection Notes

Select this component when a precise 2.5V rail is required with high current capability up to 1.5A. The low dropout characteristic makes it suitable for applications where the input voltage is close to the desired output level. Consider the thermal performance of the DPAK package relative to the expected ambient temperature and load current to ensure operation within the specified junction temperature limits.

Part Context

This part belongs to the LD29150 series of high-current, high-accuracy low-dropout regulators from STMicroelectronics. The series offers both fixed and adjustable output options across various packages. The DT25R variant specifically denotes the fixed 2.5V output version packaged in the DPAK form factor, distinguishing it from adjustable or other voltage variants within the same family.

Replacement Considerations

Direct substitutes within the same series include LD29150DTxxR variants with different fixed output voltages if the voltage requirement changes. For adjustable output needs, the LD29150PTR may be considered, though it requires external resistors and uses a PPAK package.