LMR12010
www.ti.com
SNVS731A –SEPTEMBER 2011–REVISED SEPTEMBER 2011
®
LMR12010 SIMPLE SWITCHER 20Vin, 1A Step-Down Voltage Regulator in SOT-23
Check for Samples: LMR12010
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FEATURES
DESCRIPTION
The LMR12010 regulator is
a monolithic, high
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Input Voltage Range of 3V to 20V
Output Voltage Range of 0.8V to 17V
Output Current Up to 1A
frequency, PWM step-down DC/DC converter in a 6-
pin Thin SOT-23 package. It provides all the active
functions to provide local DC/DC conversion with fast
transient response and accurate regulation in the
smallest possible PCB area.
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1.6MHz (LMR12010X) and 3 MHz (LMR12010Y)
Switching Frequencies
With a minimum of external components and online
design support through WEBENCH, the LMR12010 is
easy to use. The ability to drive 1A loads with an
internal 300mΩ NMOS switch using state-of-the-art
0.5µm BiCMOS technology results in the best power
density available. The world class control circuitry
allows for on-times as low as 13ns, thus supporting
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
(LMR12010Y), allowing the use of extremely small
surface mount inductors and chip capacitors. Even
though the operating frequencies are very high,
efficiencies up to 90% are easy to achieve. External
shutdown is included, featuring an ultra-low stand-by
current of 30nA. The LMR12010 utilizes current-mode
control and internal compensation to provide high-
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Low Shutdown Iq, 30 nA Typical
Internal Soft-start
Internally Compensated
Current-Mode PWM Operation
Thermal Shutdown
Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)
Fully Enabled for WEBENCH® Power Designer
APPLICATIONS
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Point-of-Load Conversions from 3.3V, 5V, and
12V Rails
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Space Constrained Applications
Battery Powered Equipment
Industrial Distributed Power Applications
Power Meters
performance regulation over
a wide range of
operating conditions. Additional features include
internal soft-start circuitry to reduce inrush current,
pulse-by-pulse current limit, thermal shutdown, and
output over-voltage protection.
Portable Hand-Held Instruments
PERFORMANCE BENEFITS
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Extremely Easy to Use
Tiny Overall Solution Reduces System Cost
D2
V
BOOST
SW
V
IN
IN
C3
D1
C1
L1
V
OUT
LMR12010
ON
C2
EN
R1
OFF
FB
GND
R2
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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.
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SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated