EN

BOOST

SW

FB

GND

C3

L1

C1

C2

R1

R2

D1

D2

ON

OFF

LMR12007

www.ti.com

SNVS982 – SEPTEMBER 2013

LMR12007 Thin SOT23 750mA Load Step-Down DC-DC Regulator

Check for Samples: LMR12007

1

FEATURES

DESCRIPTION

The LMR12007 regulator is a monolithic, high

23

•

Thin SOT-6 Package

frequency, PWM step-down DC/DC converter in a 6-

•

3.0V to 18V Input Voltage Range

pin Thin SOT package. It provides all the active

•

1.25V to 16V Output Voltage Range

functions to provide local DC/DC conversion with fast

transient response and accurate regulation in the

•

750mA Output Current

smallest possible PCB area.

•

550kHz (LMR12007Y) and 1.6MHz (LMR12007X)

With a minimum of external components and online

Switching Frequencies

•

350m

Ω NMOS Switch

is easy to use. The ability to drive 750mA loads with

•

30nA Shutdown Current

an internal 350m

Ω NMOS switch using state-of-the-

•

1.25V, 2% Internal Voltage Reference

art 0.5µm BiCMOS technology results in the best

power density available. The world class control

•

Internal Soft-Start

circuitry allows for on-times as low as 13ns, thus

•

Current-Mode, PWM Operation

supporting exceptionally high frequency conversion

•

over the entire 3V to 18V input operating range down

to the minimum output voltage of 1.25V. Switching

•

Thermal Shutdown

frequency is internally set to 550kHz (LMR12007Y) or

1.6MHz (LMR12007X), allowing the use of extremely

APPLICATIONS

small surface mount inductors and chip capacitors.

•

Local Point of Load Regulation

Even though the operating frequencies are very high,

efficiencies up to 90% are easy to achieve. External

•

Core Power in HDDs

shutdown is included, featuring an ultra-low stand-by

•

Set-Top Boxes

current of 30nA. The LMR12007 utilizes current-mode

•

Battery Powered Devices

control and internal compensation to provide high-

performance

regulation

over

a

wide

range

of

•

USB Powered Devices

operating

conditions.

Additional

features

include

•

DSL Modems

internal soft-start circuitry to reduce inrush current,

•

Notebook Computers

pulse-by-pulse current limit, thermal shutdown, and

output over-voltage protection.

Typical Application Circuit

Efficiency vs Load Current "X"

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

WEBENCH is a registered trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.