LDK220C-R

Overview

The LDK220C-R is a fixed-output linear low-dropout regulator from STMicroelectronics, providing a maximum output current of 200 mA. It operates with an input voltage range of 2.5 V to 13.2 V and features a typical dropout voltage of 100 mV at 100 mA load. The device includes logic-controlled electronic shutdown for ultra-low power consumption and internal protection against short circuits and thermal overload. It is designed for stability with ceramic capacitors and offers high PSRR.

Feature Summary

• Logic-controlled enable function allows deep shutdown mode with minimal current draw
• Internal constant current limiting and thermal protection ensure operational safety
• Compatible with small ceramic output capacitors for stable regulation

Applications

• Battery-powered portable devices requiring extended runtime
• Low-noise analog circuit power supplies
• Embedded systems with strict power management requirements

Procurement Notes

Verify the specific suffix letter (e.g., C, U, M) in the full part number to confirm the exact package type and output voltage configuration. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process before ordering.

Selection Notes

Select this component when a fixed 3.3V or 5V output is required within the LDK220 family. Ensure the input voltage remains within the 2.5V to 13.2V range. Consider the SOT-323-5 package if space is limited, or verify if an adjustable variant is needed instead.

Part Context

This part belongs to the LDK220 series of low-dropout regulators. The series is characterized by low quiescent current and low noise, making it suitable for sensitive applications. Other variants in the series include different output voltages and packages such as SOT-89 and DFN6.

Replacement Considerations

Check datasheets for alternative LDOs with similar 200mA output and low IQ. Verify pin compatibility and thermal performance if substituting with parts from other manufacturers.