LK112M15TR

Overview

The LK112M15TR is a low-dropout linear regulator manufactured by STMicroelectronics, featuring a fixed 1.5V output and a maximum load current of 150mA. It operates within an input voltage range of 2.0V to 14V and utilizes a SOT-23-5 surface-mount package. The device incorporates internal thermal shutdown and overcurrent protection mechanisms. Quiescent current is specified at 250µA in ON mode, with a typical output noise of 30µVrms. Voltage regulation accuracy is maintained at ±2% at 25°C.

Feature Summary

• Integrated shutdown function controllable via TTL or CMOS logic levels for power management
• Low output noise performance achievable through external capacitor connection to the noise bypass pin
• Internal PNP pass transistor design enables low dropout voltage characteristics under load

Applications

• Battery-powered portable electronic devices requiring efficient voltage regulation
• Noise-sensitive analog circuits needing stable low-voltage supply rails
• Embedded systems utilizing microcontrollers with specific low-voltage operational requirements

Procurement Notes

Verify the exact output voltage and current rating against the specific application requirements before procurement. Confirm that the SOT-23-5 package dimensions align with the PCB footprint design. Ensure compatibility with the system's logic levels for the shutdown control pin. Check for any specific handling precautions related to electrostatic discharge during assembly processes.

Selection Notes

Select this component when a fixed low voltage output around 1.5V is required with moderate current capabilities up to 150mA. Consider its low quiescent current for battery-operated applications where power efficiency is critical. Evaluate the need for the shutdown feature if system power management requires remote control of the regulator state. Compare dropout voltage specifications against the minimum available input voltage in the target circuit.

Part Context

This part belongs to the LK112S series of low-noise, low-dropout regulators from STMicroelectronics. The series offers various fixed output voltages and includes features like thermal and current limiting. It is categorized under PMIC - Power Management ICs, specifically within the linear voltage regulator segment designed for compact, efficient power solutions in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other parts from the LK112S family with similar electrical characteristics, such as the LK112M18TR or LK112SM18TR, provided the output voltage matches the design needs. Verify pinout compatibility and package type (SOT-23-5) when considering alternative manufacturers' equivalents.