LDK220C33R

Overview

The LDK220C33R is a low-dropout linear voltage regulator from STMicroelectronics, providing a fixed 3.3 V output with a maximum current of 200 mA. It operates within 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 exhibits ultra-low quiescent current of 55 µA, reducing to less than 1 µA in shutdown mode via logic control. Output voltage tolerance is ±2.0% at 25 °C. It supports ceramic capacitors as small as 1 µF for stability and includes internal short-circuit constant current limiting and thermal protection.

Feature Summary

• Logic-controlled electronic shutdown function enables deep sleep mode with minimal power consumption
• Compatible with small-value ceramic output capacitors for compact circuit design
• Integrated short-circuit current limiting and thermal protection mechanisms ensure operational safety

Applications

• Battery-powered portable electronics requiring extended standby life
• Low-noise analog circuits sensitive to power supply fluctuations
• Embedded systems utilizing ceramic decoupling capacitors

Procurement Notes

Verify the specific suffix 'C33R' against official datasheets to confirm the fixed 3.3 V output voltage and reel packaging configuration. Ensure compatibility with SOT-23-5L or SOT-323-5L footprints depending on the exact variant ordered. Cross-reference RoHS compliance status directly with manufacturer documentation prior to procurement.

Selection Notes

Select this component when designing for applications demanding both high efficiency and low noise. The wide input voltage range accommodates various battery chemistries. Verify that the required output current does not exceed 200 mA and that the PCB layout supports the specified ceramic capacitor requirements for optimal stability.

Part Context

This part belongs to the LDK220 series of low-dropout regulators designed for battery-operated devices. The series emphasizes low quiescent current and low noise performance. Other variants in the family offer different fixed output voltages or adjustable configurations while maintaining similar package options and protection features.

Replacement Considerations

Consult official substitution lists for equivalent LDOs with matching 200 mA output and 3.3 V fixed voltage. Verify pinout compatibility if replacing with components from other manufacturers. Ensure replacement parts support the same ceramic capacitor stability requirements.