LMR12015 Datasheet, PDF (1/41 Pages) Texas Instruments – SIMPLE SWITCHER 20Vin, 1.5A/2A Step-Down Voltage Regulator in WSON-10

LMR12015, LMR12020
www.ti.com
SNVS817A – JUNE 2012 – REVISED APRIL 2013
LMR12015/LMR12020 SIMPLE SWITCHER^® 20Vin, 1.5A/2A Step-Down Voltage Regulator
in WSON-10
Check for Samples: LMR12015, LMR12020
FEATURES
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•23 Space Saving 3 x 3 x 0.8 mm WSON-10
Package
• Input Voltage Range of 3V to 20V
• Output Voltage Range of 1V to 18V
• LMR12015 and LMR12020 Deliver 1.5A and 2A
Maximum Output Current Respectively
• 2 MHz Switching Frequency
• Frequency Synchronization from 1.00 MHz to
2.35 MHz
• 70 nA Shutdown Current
• 1% Voltage Reference Accuracy
• Peak Current Mode PWM Operation
• Thermal Shutdown
• Internally Compensated
• Internal Soft-Start
• WEBENCH^® Enabled
PERFORMANCE BENEFITS
• Tight Accuracy for Powering Digital ICs
• Extremely Easy to Use
• Tiny Overall Solution Reduces System Cost
DESCRIPTION
The LMR12015/20 regulator is a monolithic, high
frequency, PWM step-down DC-DC converter in a 10-
pin WSON package. It contains all the active
functions to provide local DC-DC conversion with fast
transient response and accurate regulation in the
smallest possible PCB area.
With a minimum of external components the
LMR12015/20 is easy to use. The ability to drive
1.5/2A loads respectively, with an internal 150 mΩ
NMOS switch results in the best power density
available. The control circuitry allows for on-times as
low as 65 ns, thus supporting exceptionally high
frequency conversion. Switching frequency is
internally set to 2 MHz and synchronizable from 1 to
2.35 MHz, which allows the use of extremely small
surface mount inductors and chip capacitors. Even
though the operating frequency is very high,
efficiencies up to 90% are easy to achieve. External
shutdown is included featuring an ultra-low shutdown
current of 70 nA. The LMR12015/20 utilizes peak
current mode control and internal compensation to
provide high-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.
APPLICATIONS
• Point-of-Load Conversions from 3.3V, 5V and
12V Rails
• Space Constrained Applications
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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.
SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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 © 2012–2013, Texas Instruments Incorporated