LDFPUR

Overview

The LDFPUR is a low-dropout linear regulator manufactured by STMicroelectronics, designed for high-efficiency power management applications. It provides an adjustable output voltage ranging from 0.8 V to the input supply limit, supporting a continuous load current of up to 1 A. The device operates with an input voltage range of 2.6 V to 16 V and features a maximum dropout voltage of 0.35 V at full load. Key electrical characteristics include a quiescent current of 1.4 mA and a power supply rejection ratio (PSRR) of 70 dB at 120 Hz. It incorporates comprehensive protection mechanisms such as thermal shutdown, overcurrent limiting, and reverse battery protection.

Feature Summary

• Adjustable output voltage capability allows flexible design integration across various system requirements
• Integrated thermal shutdown and overcurrent protection ensure robust operation under fault conditions
• Low dropout voltage characteristic enables efficient power conversion even with minimal input-output differential
• High power supply rejection ratio maintains stable output voltage despite input line noise

Applications

• Portable consumer electronics requiring efficient linear regulation
• Battery-powered devices needing extended operational life through low quiescent current
• Embedded systems utilizing microcontrollers or sensors with specific voltage tolerance needs
• Automotive infotainment and control modules operating within wide input voltage ranges

Procurement Notes

Verify the exact package marking and date code against the manufacturer's latest datasheet revision to ensure component authenticity. Confirm that the ordering suffix matches the required tape-and-reel quantity specifications for your assembly line. Check for any recent RoHS compliance updates or environmental declarations relevant to your region's regulatory standards before finalizing procurement orders.

Selection Notes

Select this component when an adjustable output voltage is preferred over fixed options to accommodate varying system rail requirements. Ensure the maximum input voltage does not exceed 16 V and that the thermal dissipation capabilities of the 6-DFN package are sufficient for the expected ambient temperature and load current conditions. Consider the PSRR requirements of downstream sensitive analog circuits when evaluating noise performance.

Part Context

This part belongs to the LDF series of ultra-low dropout regulators from STMicroelectronics, which are engineered for cost-effective and space-constrained designs. The series typically offers load currents ranging from 50 mA to 3 A, providing designers with scalable solutions for diverse power management needs across industrial, automotive, and consumer sectors.

Replacement Considerations

LDFPVR is a documented parameter-equivalent substitute within the same product family, offering identical electrical specifications and pinout compatibility.