LDK120C30R

Overview

The LDK120C30R is a low-dropout linear voltage regulator from STMicroelectronics, providing a maximum output current of 200 mA. It operates with an input supply voltage range of 1.9 V to 5.5 V and features a typical dropout voltage of 100 mV at a 100 mA load. The device ensures stability when used with a ceramic capacitor on the output. It includes logic-controlled electronic shutdown functionality, reducing total current consumption to less than 1 μA in off mode. Internal protections include constant current limiting for short circuits and thermal protection.

Feature Summary

• Ultra-low dropout voltage performance suitable for battery-powered applications
• Logic-controlled enable pin allows for deep sleep modes with minimal quiescent current
• Integrated short-circuit current limiting and thermal overload protection

Applications

• Low-power battery-operated consumer electronics
• Portable devices requiring stable voltage regulation with minimal power loss
• Always-on automotive or industrial systems with wide input voltage variations

Procurement Notes

Verify the specific suffix 'C30R' against official STMicroelectronics documentation to confirm package type, tape-and-reel specifications, and regional compliance certifications. Ensure compatibility with your PCB footprint, as this part is available in multiple packages including SOT-323-5L and DFN6. Cross-reference the exact ordering code with authorized distributors to avoid counterfeit components.

Selection Notes

Select the LDK120C30R when designing circuits that demand high efficiency under light loads due to its low quiescent current. It is appropriate for systems where space is constrained by its small package options. Consider the adjustable output voltage range if precise voltage levels are required, ensuring the external resistor network maintains stability with the specified output capacitance.

Part Context

This component belongs to the LDK120 series of ultra-low dropout regulators designed for harsh environments. The series offers robust performance with extended input voltage ranges and high PSRR. It is part of STMicroelectronics' portfolio aimed at simplifying power management in compact, energy-efficient designs across automotive and industrial sectors.

Replacement Considerations

Consult official substitution guides for equivalents within the LDK series or other ST LDOs with similar 200 mA ratings and SOT-323/DFN footprints. Verify pin-out compatibility and electrical characteristics before replacing.