Datasheet

LMR12010
V
IN
V
IN
EN
BOOST
SW
FB
GND
V
OUT
C3
L1
C1
C2
R1
R2
D1
D2
ON
OFF
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
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 300mΩ 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
• Fully Enabled for WEBENCH
®
Power Designer
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.
2SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.
3All 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.