LK115D50

Overview

The LK115D50-TR is a fixed-output linear voltage regulator from STMicroelectronics, providing a nominal 5.0 V output with a maximum load current of 100 mA. It operates within an input voltage range up to 20 V and features a typical dropout voltage of 0.17 V at 60 mA. The device incorporates two logic-controlled shutdown inputs for power management, achieving a quiescent current as low as 0.01 µA in the off state. It includes internal thermal and current limiting protections and maintains stability with a minimum output capacitance of 2.2 µF.

Feature Summary

• Dual active HIGH and active LOW electronic shutdown controls enable precise standby power management.
• Very low dropout voltage ensures efficient operation in battery-powered systems.
• Minimal external component requirement with stability achieved using only a 2.2 µF capacitor.
• Integrated thermal shutdown and current limit protection enhance system reliability.

Applications

• Battery-powered portable electronics
• Low noise analog circuitry
• Standby power control sections

Procurement Notes

Verify the specific suffix (e.g., -TR) against the manufacturer's official documentation to confirm packaging type and availability status. Confirm that the required output voltage tolerance and operating temperature range align with the design specifications before finalizing procurement.

Selection Notes

Select this component when a fixed 5 V rail is required with minimal quiescent current consumption. Ensure the application utilizes the dual shutdown pins if power-down functionality is necessary. Verify that the input voltage does not exceed the absolute maximum rating of 20 V under all operating conditions.

Part Context

This part belongs to the LK115XX series of very low drop regulators manufactured by STMicroelectronics. The series offers various fixed output voltages including 3.0 V, 3.3 V, and 5.0 V, packaged in an SO-8 format. These regulators are designed for applications requiring high efficiency and low power dissipation.

Replacement Considerations

LK115D30-TR provides a 3.0 V output. LK115D33-TR provides a 3.3 V output. Both share identical pinouts and package dimensions but differ in regulated output voltage.