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LD1085V50

LD1085V50

STMicroelectronics
Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-220
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Overview

The LD1085V50 is a high-current positive voltage regulator capable of providing up to 3A of output current at a fixed 5V. It is a low-dropout (LDO) linear regulator designed for efficiency in power conversion, featuring a maximum input voltage of 30V and an operating temperature range of -40C to 125C.

Why Choose This Part

This regulator offers excellent transient response and high ripple rejection of 72dB at 120Hz, ensuring a clean 5V output. The TO-220 package provides easy heat sinking for high-current loads, and the device includes integrated over-current and over-temperature protection to prevent failure during fault conditions.

Applications

High-Efficiency Linear Supplies
Used in power stages requiring 3A current where high efficiency is achieved by maintaining a low input-to-output voltage differential.
Post-Regulation for Switching Supplies
Ideal for cleaning up noise from a switching regulator to provide a stable 5V rail for sensitive analog and digital circuits.
Industrial Control Systems
Provides reliable 5V power to logic boards and sensors in harsh industrial environments thanks to internal thermal and power limiting.
Battery Powered Equipment
Utilizes a low quiescent current of 5mA to minimize standby power consumption in portable applications.

Key Specifications

PSRR 72dB (120Hz)
Output Type Fixed
Mounting Type Through Hole
Package / Case TO-220-3
Current - Output 3A
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 30V
Voltage Dropout (Max) 1.5V @ 3A
Supplier Device Package TO-220
Current - Quiescent (Iq) 10 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

To implement this part, place a 10uF minimum electrolytic capacitor on the output for stability and a 0.1uF ceramic capacitor on the input to mitigate lead inductance. Ensure adequate heat sinking for the TO-220 package if the voltage drop across the regulator multiplied by the 3A load exceeds the package power dissipation limits.

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