LF50CP

Overview

The LF50CP is a positive fixed linear voltage regulator from the LFxxC series, manufactured by STMicroelectronics. It provides a stable 5 V output with a maximum load current of 500 mA. The device features a low dropout voltage of 200 mV and a quiescent current of 50 µA. It is housed in a TO-220FP package with three pins and operates within a temperature range of -40 °C to +125 °C. Input voltage tolerance extends up to 40 V.

Feature Summary

• Very low dropout voltage for efficient power management
• Low quiescent current suitable for battery-powered systems
• Integrated thermal overload protection
• Fixed 5 V output precision

Applications

• Standby microprocessor control-unit systems
• Automotive applications connected directly to car batteries
• Low-noise, low-power electronic circuits

Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Check datasheet revisions for updated electrical characteristics. Ensure storage conditions comply with manufacturer specifications. Validate pinout compatibility before PCB integration.

Selection Notes

Select this component for designs requiring a fixed 5 V rail with moderate current demands. The TO-220FP package offers robust thermal performance for through-hole mounting. Consider input voltage headroom relative to the dropout specification. Evaluate thermal dissipation requirements based on load current and ambient temperature.

Part Context

Part of the LFxx family of very low drop regulators. Designed for high reliability in industrial and automotive environments. Offers superior line and load regulation compared to standard linear regulators. Compatible with various packaging options including PENTAWATT and DPAK for different form factors.

Replacement Considerations

LF50CV: Similar LDO but in TO-220 package. LF50CPT-TR: Same functionality in PPAK surface-mount package. Verify pinout and thermal characteristics when substituting.