L4940D2T5 - STMicroelectronics

Manufacturer Part Number

L4940D2T5

Manufacturer

stmicroelectronics

Introduction

The L4940D2T5 is a low drop-out (LDO) voltage regulator designed for power management applications, offering fixed output regulation with a high degree of efficiency and reliability.

Product Features and Performance

Positive output configuration with a fixed 5V output

Capable of driving up to 1.5A output current

Low dropout voltage of 0.9V at 1.5A load

Quiescent current of 8 mA and maximum supply current of 50 mA

Excellent power supply rejection ratio (PSRR) of 68dB at 120Hz

Over temperature, reverse polarity, and short circuit protection

Operating temperature range from -40°C to 150°C

Product Advantages

High reliability and efficiency in voltage regulation

Built-in protection features enhance product longevity and safety

Low dropout feature allows operation close to the input voltage, reducing power loss

Wide operating temperature range suitable for industrial applications

Key Technical Parameters

Voltage Input (Max): 17V

Voltage Output (Min/Fixed): 5V

Current Output: 1.5A

Voltage Dropout (Max): 0.9V @ 1.5A

PSRR: 68dB (120Hz)

Quality and Safety Features

Reverse polarity protection prevents damage from incorrect power supply connection

Over temperature protection ensures the regulator operates within safe temperature limits

Short Circuit Protection guards against circuit damage from output overloads

Compatibility

Surface Mount Technology (SMT) for efficient PCB design and layout

TO-263-3, D2PAK packaging compatible with a wide range of circuit boards and applications

Application Areas

Power supply circuits in consumer electronics

Industrial control systems requiring stable 5V power

Automotive applications benefiting from broad operating temperature range and reliability

Product Lifecycle

Obsolete status, suggesting consideration for replacement or upgrade options where possible

Users should seek current equivalent models or consult with the manufacturer for future-proof designs

Several Key Reasons to Choose This Product

High-efficiency fixed voltage regulation suitable for a wide range of applications

Low dropout performance for reduced power loss and improved efficiency

Built-in safety and protection features ensure reliability under various conditions

Stmicroelectronics' reputation for producing high-quality power management solutions

Suitable for designs requiring a durable and dependable 5V power source in a compact form factor