LD39300DT25-R

Overview

The LD39300DT25-R is a fixed-output linear regulator from STMicroelectronics providing a 2.5V output with a guaranteed 3A load current. It operates within a 2.5V to 6V input range and features ultra-low dropout voltage, reaching typical values of 40mV at 600mA and 200mV at 3A. The device incorporates logic-controlled electronic shutdown, reducing quiescent current to under 1µA in off mode. It includes internal short-circuit and thermal protection mechanisms.

Feature Summary

• Ultra-low dropout voltage performance for high efficiency
• Logic-controlled electronic shutdown capability
• Internal current limit and thermal protection
• Stable operation with ceramic output capacitors

Applications

• Microprocessor power supply
• DSPs power supply
• Post regulators for switching supplies

Procurement Notes

Verify component authenticity through authorized channels as the part is obsolete. Confirm package integrity and pin alignment against DPAK specifications. Ensure replacement components match electrical parameters if sourcing alternatives. Check RoHS compliance status prior to integration into final assemblies.

Selection Notes

Select this component for applications requiring high current delivery with minimal voltage drop. Verify that the input voltage remains within the specified operational limits. Ensure adequate thermal management is implemented due to power dissipation characteristics. Confirm compatibility with required output capacitance for stability.

Part Context

This device belongs to the LD39300 series of ultra-low drop BICMOS voltage regulators. It is designed for low voltage microprocessor and memory applications where low noise and fast dynamic response are critical. The BiCMOS process enables low quiescent current independent of output load.

Replacement Considerations

Diodes Incorporated AP7361-25D-13 is listed as an alternative substitute.