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LF50ABDT-TR

LF50ABDT-TR

STMicroelectronics
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA DPAK
Active19,985 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LF50ABDT-TR is a very low drop positive voltage regulator with a fixed 5V output and a maximum current capacity of 500mA. It is designed to provide stable power in space-constrained applications with an input voltage range up to 16V, featuring a typical quiescent current of only 100uA. This automotive-grade component includes internal current limiting and thermal shutdown protection to ensure system reliability.

Why Choose This Part

The LF50ABDT-TR offers a high PSRR of up to 76dB at 120Hz, making it excellent for ripple rejection. Its low dropout performance allows for efficient operation even as the input voltage approaches the 5V target, while the DPAK package provides sufficient thermal dissipation for 500mA loads without excessive PCB area.

Applications

Automotive ECU Power
Providing stable 5V rails for logic circuits and microcontrollers in vehicle subsystems.
Battery-Powered Instruments
Utilizing low quiescent current to extend operating life in portable monitoring equipment.
Industrial Control Logic
Regulating local 5V supplies from 12V distributed DC rails in noisy industrial environments.
Post-Regulator for Switching Supplies
Filtering high-frequency ripple from DC-DC converters to provide a clean analog rail.

Key Specifications

PSRR 76dB ~ 60dB (120Hz ~ 10kHz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-252-3, DPAK (2 Leads + Tab), SC-63
Current - Output 500mA
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 16V
Voltage Dropout (Max) 0.7V @ 500mA
Current - Supply (Max) 12 mA
Supplier Device Package DPAK
Current - Quiescent (Iq) 1 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

When designing with the LF50ABDT-TR, ensure a minimum 2.2uF output capacitor with low ESR is used for stability as specified in the datasheet. Place the DPAK package on a copper pour to manage heat dissipation, particularly when the input voltage exceeds 7V at high current loads.

Also Consider

LM2937ET-5.0 TITexas Instruments - Consider this if a TO-220 through-hole package is required for higher power dissipation or breadboard prototyping.