LK115D50-TR

Overview

The LK115D50-TR is a fixed-output linear voltage regulator from the LK115 series, manufactured by STMicroelectronics. It provides a nominal output voltage of 5 V with a tolerance of ±3% at 25 °C and supports an output current up to 100 mA. The device operates within an input voltage range of up to 20 V and features a typical dropout voltage of 0.17 V at 60 mA. It incorporates two logic-controlled electronic shutdowns for power management and requires only a 2.2 µF output capacitor for stability. The component is housed in an SO-8 surface-mount package.

Feature Summary

• Dual active HIGH and active LOW shutdown logic control for standby mode
• Very low quiescent current consumption in both on and off modes
• Integrated internal current and thermal limiting protection
• Low noise performance suitable for sensitive applications

Applications

• Battery-powered systems requiring low power consumption
• Low noise analog circuitry
• Portable electronic devices
• Embedded local regulators

Procurement Notes

Verify the specific ordering code suffix against official manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and material declaration details directly with the supplier or manufacturer before procurement. Ensure the source document matches the exact part number variant intended for integration.

Selection Notes

Select this component when a fixed 5 V output is required with minimal external capacitance. Consider the dual shutdown pins if system-level power management via logic signals is necessary. Evaluate the maximum input voltage limit relative to the supply rail and ensure the operating temperature range aligns with the application environment.

Part Context

This device belongs to the LK115XX series of very low drop regulators available in SO-8 packages. The series includes variants with different fixed output voltages, specifically 3.0 V, 3.3 V, and 5.0 V. All members share identical pin configurations and protection features, differing primarily in their regulated output levels.

Replacement Considerations

LK115D30-TR (3 V output)

FAQ

What is the minimum output capacitance required for stability?

The device requires a minimum output bypass capacitance of 2.2 µF with an ESR between 0.5 Ω and 10 Ω.

How does the shutdown functionality operate?

It features two logic-controlled electronic shutdowns (Pin 2 and Pin 3) that allow active HIGH or active LOW control to place the regulator in an OFF state.