LMR10515XMFE Datasheet, PDF (1/26 Pages) Texas Instruments – LMR10515 SIMPLE SWITCHER 5.5Vin, 1.5A Step-Down Voltage Regulator in SOT-23 and WSON

LMR10515
www.ti.com
SNVS728C – OCTOBER 2011 – REVISED APRIL 2013
LMR10515 SIMPLE SWITCHER^® 5.5Vin, 1.5A Step-Down Voltage Regulator
in SOT-23 and WSON
Check for Samples: LMR10515
FEATURES
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•23 Input Voltage Range of 3V to 5.5V
• Output Voltage Range of 0.6V to 4.5V
• Output Current up to 1.5A
• 1.6MHz (LMR10515X) and 3 MHz (LMR10515Y)
Switching Frequencies
• Low Shutdown Iq, 30 nA Typical
• Internal Soft-Start
• Internally Compensated
• Current-Mode PWM Operation
• Thermal Shutdown
• SOT-23 (2.92 x 2.84 x 1 mm) and WSON
(3 x 3 x 0.8 mm) Packaging
• Fully Enabled for WEBENCH^® Power Designer
APPLICATIONS
• Point-of-Load Conversions from 3.3V, and 5V
Rails
• Space Constrained Applications
• Battery Powered Equipment
• Industrial Distributed Power Applications
• Power Meters
• Portable Hand-Held Instruments
PERFORMANCE BENEFITS
• Extremely easy to use
• Tiny overall solution reduces system cost
DESCRIPTION
The LMR10515 regulator is a monolithic, high
frequency, PWM step-down DC/DC converter in a 5
pin SOT-23 and a 6 Pin WSON 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. With a
minimum of external components, the LMR10515 is
easy to use. The ability to drive 1.5A loads with an
internal 130 mΩ PMOS switch results in the best
power density available. The world-class control
circuitry allows on-times as low as 30ns, thus
supporting exceptionally high frequency conversion
over the entire 3V to 5.5V input operating range down
to the minimum output voltage of 0.6V. The
LMR10515 is internally compensated, so it is simple
to use and requires few external components.
Switching frequency is internally set to 1.6 MHz, or
3.0 MHz, allowing the use of extremely small surface
mount inductors and chip capacitors. Even though the
operating frequency is high, efficiencies up to 93%
are easy to achieve. External shutdown is included,
featuring an ultra-low stand-by current of 30 nA. The
LMR10515 utilizes 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.
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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.
WEBENCH is a registered trademark 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 © 2011–2013, Texas Instruments Incorporated