LDK120M25R

Overview

The LDK120M25R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, delivering a maximum output current of 200 mA. It operates within an input voltage range of 1.9 V to 5.5 V and provides a fixed output voltage of 2.5 V. The device features a typical dropout voltage of 100 mV at 100 mA load and maintains stability with a ceramic capacitor on the output. Key electrical characteristics include a maximum quiescent current of 100 µA and a shutdown mode consumption lower than 1 µA. It incorporates internal short-circuit constant current limiting and thermal protection mechanisms.

Feature Summary

• Logic-controlled electronic shutdown function for ultra-low power consumption
• Compatible with small ceramic output capacitors for stable operation
• Integrated short-circuit current limiting and thermal overload protection

Applications

• Low-power battery-operated portable devices
• Always-on circuits requiring minimal standby current
• Noise-sensitive analog signal conditioning stages

Procurement Notes

Verify the complete part number against official manufacturer documentation to ensure correct output voltage and package configuration. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration into the supply chain. Cross-reference datasheet revisions to validate pinout compatibility and recommended operating conditions for your specific design environment.

Selection Notes

Select this component when a fixed 2.5 V rail is required from a single-cell or dual-cell battery source. The low quiescent current makes it suitable for energy-constrained applications where standby power drain must be minimized. Ensure the input voltage remains within the specified 1.9 V to 5.5 V range to maintain regulation and prevent excessive power dissipation under heavy load conditions.

Part Context

This device belongs to the LDK120 series of ultra-low dropout regulators designed for high efficiency in low-voltage systems. The series offers various fixed output voltages and adjustable versions to accommodate diverse system requirements. Manufactured using advanced CMOS technology, these regulators provide robust performance in compact surface-mount packages suitable for space-constrained consumer electronics designs.

Replacement Considerations

Consult the official LDK120 family datasheet for verified alternative part numbers with different fixed output voltages or adjustable configurations. Ensure any substitute maintains the same SOT-23-5 footprint and electrical specifications to guarantee direct compatibility without circuit redesign.