Copyright © 2016, Texas Instruments Incorporated

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM2672

SNVS136L – SEPTEMBER 1998 – REVISED JUNE 2016

Regulator with Features

1

1 Features

1

•

Efficiency up to 96%

•

Available in 8-Pin SOIC and PDIP Packages

•

Requires only 5 External Components

•

3.3-V, 5-V, 12-V, and Adjustable Output Versions

•

Adjustable Version Output Voltage Range: 1.21 V

to 37 V

•

±1.5% Maximum Output Voltage Tolerance Over

Line and Load Conditions

•

Specified 1-A Output Load Current

•

Wide Input Voltage Range: 8 V to 40 V

•

260-kHz Fixed Frequency Internal Oscillator

•

TTL Shutdown Capability, Low Power Standby

Mode

•

Soft-Start and Frequency Synchronization

•

Thermal Shutdown and Current Limit Protection

2 Applications

•

Simple High Efficiency (>90%) Step-Down (Buck)

Regulator

•

Efficient Preregulator for Linear Regulators

3 Description

The LM2672 series of regulators are monolithic

integrated DC-DC converter built with a LMDMOS

process. These regulators provide all the active

functions for a step-down (buck) switching regulator,

capable of driving a 1-A load current with excellent

line and load regulation. These devices are available

in fixed output voltages of 3.3 V, 5 V, 12 V, and an

adjustable output version.

Requiring

a

minimum

number

of

external

components, these regulators are simple to use and

include patented internal frequency compensation,

fixed frequency oscillator, external shutdown, soft-

start, and frequency synchronization.

The LM2672 series operates at a switching frequency

of

260

kHz,

thus

allowing

smaller

sized

filter

components

than

what

is

required

with

lower

frequency switching regulators. Because of its very

high efficiency (>90%), the copper traces on the

printed-circuit

board

are

the

only

heat

sinking

required.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM2672

SOIC (8)

5.00 mm × 6.20 mm

PDIP (8)

10.16 mm × 6.60 mm

WSON (16)

5.00 mm × 5.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application

Fixed output voltage versions