LD39015M15R

Overview

The LD39015M15R is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 1.5 V output with a maximum current 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 includes logic-controlled shutdown functionality reducing consumption below 1 μA. It incorporates internal short-circuit constant current limiting and thermal protection, ensuring reliability in battery-powered applications.

Feature Summary

• Ultra-low dropout voltage operation suitable for minimal voltage headroom requirements
• Logic-controlled electronic shutdown enabling deep sleep modes with negligible current draw
• Integrated short-circuit constant current limiting and thermal protection mechanisms

Applications

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

Procurement Notes

Verify the specific suffix 'M15R' corresponds to the 1.5 V fixed output variant and SOT-23-5 packaging. Confirm RoHS compliance status and moisture sensitivity level prior to ordering. Ensure the design utilizes ceramic capacitors compatible with the device's stability requirements. Cross-reference the manufacturer part number against official distribution channels to avoid counterfeit components.

Selection Notes

Select this component when a fixed 1.5 V rail is required with minimal footprint and low static power consumption. It is appropriate for designs where input voltage varies between 1.5 V and 5.5 V. Consider the enable pin functionality if system power sequencing or shutdown control is necessary. Verify that the load current does not exceed the 150 mA guaranteed limit under all operating conditions.

Part Context

This part belongs to the LD39015 series of low-quiescent-current, low-noise voltage regulators designed for portable electronics. The series offers various fixed output voltages ranging from 0.8 V to 3.3 V in 100 mV steps. All variants share similar electrical characteristics, including ultra-low dropout performance and compatibility with small ceramic output capacitors, making them ideal for space-constrained mobile devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.