LD39015M25R

Overview

The STMicroelectronics LD39015M25R is a fixed-output linear voltage regulator providing a stable 2.5 V output with a maximum current capability of 150 mA. It operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 80 mV at 100 mA load. The device exhibits very low quiescent current, typically 18 μA at no load and 38 μA at full load, with shutdown consumption below 1 μA when enabled logic control is active. Output voltage tolerance is ±2.0% at 25 °C. Power supply rejection ratio reaches 65 dB at low frequencies. The regulator is stable with ceramic capacitors and includes internal short-circuit constant current limiting and thermal protection.

Feature Summary

• Ultra-low dropout voltage operation suitable for battery-powered applications
• Logic-controlled electronic shutdown for extended battery life
• Compatible with small ceramic output capacitors
• Integrated short-circuit and thermal protection mechanisms

Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Cordless phones
• Battery-powered systems

Procurement Notes

Verify the specific suffix 'M25R' corresponds to the 2.5 V fixed output variant in the SOT-23-5 package. Confirm RoHS compliance status and ensure the ordering code matches the required tape-and-reel quantity specifications provided by the manufacturer or authorized distributors. Cross-reference the datasheet revision date to ensure alignment with current design requirements.

Selection Notes

Select this component for designs requiring a compact solution with minimal static power consumption. The fixed 2.5 V output eliminates the need for external resistors. Ensure the input voltage remains above 1.5 V and consider the thermal dissipation capabilities of the SOT-23-5 package under maximum load conditions. Verify compatibility with the system's ceramic capacitor ESR requirements for stability.

Part Context

The LD39015 series comprises low-quiescent-current, low-noise voltage regulators designed for portable electronics. This specific part belongs to the family offering 150 mA output current with ultra-low dropout characteristics. The series supports various fixed output voltages and is optimized for applications where power efficiency and noise performance are critical constraints.

Replacement Considerations

Publicly confirmed substitute part numbers for the LD39015M25R were not identified in the available documentation.