LM2574N-5G 开关稳压器 ON

LM2574N-5G

开关稳压器 5V .5A PWR SW REG

0.5 A, Adjustable Output  Voltage, Step-Down  Switching Regulator

The LM2574N-5G LM2574 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 0.5 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.

LM2574N-5G Features

• 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% max

over Line and Load Conditions

• Guaranteed 0.5 A Output Current

• Wide Input Voltage Range: 4.75 to 40 V

• 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

• NCV Prefix for Automotive and Other Applications Requiring Site

and Control Changes

• Pb−Free Packages are Available*

LM2574N-5G Applications

• Simple and High−Efficiency Step−Down (Buck) Regulators

• Efficient Pre−regulator for Linear Regulators

• On−Card Switching Regulators

• Positive to Negative Converters (Buck−Boost)

• Negative Step−Up Converters

• Power Supply for Battery Chargers