LMR12010

EN

BOOST

SW

FB

GND

C3

L1

C1

C2

R1

R2

D1

D2

ON

OFF

LMR12010

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SNVS731A – SEPTEMBER 2011 – REVISED SEPTEMBER 2011

Check for Samples: LMR12010

1

FEATURES

DESCRIPTION

The LMR12010 regulator is a monolithic, high

23

•

Input Voltage Range of 3V to 20V

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

•

Output Voltage Range of 0.8V to 17V

pin Thin SOT-23 package. It provides all the active

•

Output Current Up to 1A

functions to provide local DC/DC conversion with fast

transient response and accurate regulation in the

•

1.6MHz (LMR12010X) and 3 MHz (LMR12010Y)

smallest possible PCB area.

Switching Frequencies

With a minimum of external components and online

•

Low Shutdown Iq, 30 nA Typical

design support through WEBENCH, the LMR12010 is

•

Internal Soft-start

easy to use. The ability to drive 1A loads with an

•

Internally Compensated

internal 300m

Ω NMOS switch using state-of-the-art

•

Current-Mode PWM Operation

0.5µm BiCMOS technology results in the best power

density available. The world class control circuitry

•

Thermal Shutdown

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

•

Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)

exceptionally high frequency conversion over the

•

entire 3V to 20V input operating range down to the

minimum output voltage of 0.8V. Switching frequency

is internally set to 1.6 MHz (LMR12010X) or 3 MHz

APPLICATIONS

(LMR12010Y), allowing the use of extremely small

•

Point-of-Load Conversions from 3.3V, 5V, and

surface mount inductors and chip capacitors. Even

12V Rails

though the operating frequencies are very high,

•

Space Constrained Applications

efficiencies up to 90% are easy to achieve. External

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

•

Battery Powered Equipment

current of 30nA. The LMR12010 utilizes current-mode

•

Industrial Distributed Power Applications

control and internal compensation to provide high-

•

Power Meters

performance

regulation

over

a

wide

range

of

operating

conditions.

Additional

features

include

•

Portable Hand-Held Instruments

internal soft-start circuitry to reduce inrush current,

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

PERFORMANCE BENEFITS

output over-voltage protection.

•

Extremely Easy to Use

•

Tiny Overall Solution Reduces System Cost

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

SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011, 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.