Name: Buck Regulator, Switching, Adjustable Output Voltage, 0.5 A
Brand: Buck Regulator, Switching, Adjustable Output Voltage, 0.5 A
SKU: LM2574

Buck Regulator, Switching, Adjustable Output Voltage, 0.5 A

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Overview

The LM2574 Buck Switching 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 loadwith 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.

The Buck Switching Regulator is designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the LM2574 are offered by several different inductor manufacturers.

Since the LM2574 converter is a switch-mode power supply, its efficiency is significantly higher in comparison with popular three-terminal linear regulators, especially with higher input voltages. In many cases, the power dissipated by the LM2574 regulator is so low, that no heatsink is required or its size could be reduced dramatically.

The LM2574 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 0C to 125C). External shutdown is included, featuring 80 uA typical standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Efficient Pre-Regulator for Linear Regulators
On-Card Switching Regulators
Power Supply for Battery Chargers
Simple and High-Efficiency Step-Down (Buck) Regulators

Automotive NCV Version Available

3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
Adjustable Version Output Voltage Range of 1.23 V to 37 V +/-4%
Guaranteed 0.5 A Output Current
Wide Input Voltage Range: 4.75 V 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
Moisture Sensitivity Level (MSL) Equals 1

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Reference Price

LM2574DW-ADJR2G

Active

SOIC-16W

751G-03

260

REEL

1000

Step-Down

Voltage Mode

1.23

0.5

$1.0485

LM2574N-12G

Active

PDIP-8

626-05

TUBE

Step-Down

Voltage Mode

0.5

$1.0493

LM2574N-5G

Active

PDIP-8

626-05

TUBE

Step-Down

Voltage Mode

0.5

$0.8433

LM2574N-ADJG

Active

PDIP-8

626-05

TUBE

Step-Down

Voltage Mode

1.23

0.5

$0.8433

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12120914040

Converters | LM2574

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