LM2574DWADJR2G ON Semiconductor, LM2574DWADJR2G Datasheet

LM2574DWADJR2G

Manufacturer Part Number

LM2574DWADJR2G

Description

SOP-16

Manufacturer

ON Semiconductor

Datasheet

1.LM2574DWADJ.pdf (26 pages)

Specifications of LM2574DWADJR2G

Date_code

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LM2574, NCV2574

0.5 A, Adjustable Output

Voltage, Step−Down

Switching Regulator

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.

components to simplify the power supply design. Standard series of

inductors optimized for use with the LM2574 are offered by several

different inductor manufacturers.

efficiency is significantly higher in comparison with popular

three−terminal linear regulators, especially with higher input voltages.

In most cases, the power dissipated by the LM2574 regulator is so low,

that the copper traces on the printed circuit board are normally the only

heatsink needed and no additional heatsinking is required.

voltage within specified input voltages and output load conditions, and

±10% on the oscillator frequency (±2% over 0°C to +125°C). External

shutdown is included, featuring 60 mA (typical) standby current. The

output switch includes cycle−by−cycle current limiting, as well as

thermal shutdown for full protection under fault conditions.

Features

•

Applications

•

*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting

August, 2006 − Rev. 8

Techniques Reference Manual, SOLDERRM/D.

The LM2574 series of regulators are monolithic integrated circuits

These regulators were designed to minimize the number of external

Since the LM2574 converter is a switch−mode power supply, its

The LM2574 features include a guaranteed ±4% tolerance on output

over Line and Load Conditions

and Control Changes

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

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

Pb−Free Packages are Available*

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

See detailed ordering and shipping information in the package

dimensions section on page 24 of this data sheet.

See general marking information in the device marking

section on page 24 of this data sheet.

* No internal connection, but should be soldered to

PC board for best heat transfer.

DEVICE MARKING INFORMATION

ORDERING INFORMATION

Pwr Gnd

ON/OFF

Sig Gnd

PIN CONNECTIONS

http://onsemi.com

(Top View)

Publication Order Number:

DW SUFFIX

CASE 751G

CASE 626

N SUFFIX

SO−16 WB

PDIP−8

Output

LM2574/D

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