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LM2576T-ADJ Switching Regulator 3.0 A, 15 V, Step-Down www.ic-stocks.com

  • Author:salmon ye
  • Source:www.ic-stocks.com
  • Release on:2021-08-30

The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step−down switching regulator (buck converter). All circuits of this series are capable of driving a 3.0 A load with excellent line and load regulation.

These devices are available in fixed output voltages of 3.3 V, 5.0 V,12 V, 15 V, and an adjustable output version.These regulators were designed to minimize the number of external components to simplify the power supply design.

Standard series of inductors optimized for use with the LM2576 are offered by several different inductor manufacturers.Since the LM2576 converter is a switch−mode power supply, itsefficiency is significantly higher in comparison with popular three−terminal linear regulators, especially with higher input voltages.In miany cases, the power dissipated is so low that no heatsink is requred or its size could be reduced dramatically.

A standard series of inductors optimized for use with the LM2576are available from several different manufacturers. This feature greatly simplifies the design of switch−mode power supplies.The LM2576 features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and±10% on the oscillator frequency (±2% over 0°C to 125°

C). Externalshutdown is included, featuring 80

A (typical) standby current. The output switch includes cycle−by−cycle current limiting, as well asthermal shutdown for full protection under fault conditions


3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions

Adjustable Version Output Voltage Range, 1.23 to 37 V ±4%

Maximum Over Line and Load Conditions

Guaranteed 3.0 A Output Current

Wide Input Voltage Range

Requires Only 4 External Components

52 kHz Fixed Frequency Internal Oscillator

TTL Shutdown Capability, Low Power Standby Mode

High Efficiency

Uses Readily Available Standard Inductors

Thermal Shutdown and Current Limit Protection

Moisture Sensitivity Level (MSL) Equals 1

Pb−Free Packages are Available*


Simple High−Efficiency Step−Down (Buck) Regulator

Efficient Pre−Regulator for Linear Regulators

On−Card Switching Regulators

Positive to Negative Converter (Buck−Boost)

Negative Step−Up Converters

Power Supply for Battery Chargers

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