LM2734Z_15 Datasheet, PDF (1/32 Pages) Texas Instruments – LM2734Z/LM2734ZQ Thin SOT 1A Load Step-Down DC-DC Regulator

LM2734Z
www.ti.com
SNVS334E – JANUARY 2005 – REVISED APRIL 2013
LM2734Z/LM2734ZQ Thin SOT 1A Load Step-Down DC-DC Regulator
Check for Samples: LM2734Z
FEATURES
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•23 Thin SOT-6 Package, or 6 Lead WSON
Package
• 3.0V to 20V Input Voltage Range
• 0.8V to 18V Output Voltage Range
• 1A Output Current
• 3MHz Switching Frequency
• 300mΩ NMOS Switch
• 30nA Shutdown Current
• 0.8V, 2% Internal Voltage Reference
• Internal Soft-Start
• Current-Mode, PWM Operation
• Thermal Shutdown
• LM2734ZQ is AEC-Q100 Grade 1 Qualified and
is Manufactured on an Automotive Grade Flow
APPLICATIONS
• DSL Modems
• Local Point of Load Regulation
• Battery Powered Devices
• USB Powered Devices
• Automotive
DESCRIPTION
The LM2734Z regulator is a monolithic, high
frequency, PWM step-down DC/DC converter
assembled in a 6-pin Thin SOT and WSON non pull
back 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 and online
design support through WEBENCH™, the LM2734Z
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 3MHz, allowing the use of
extremely small surface mount inductors and chip
capacitors. Even though the operating frequency is
very high, efficiencies up to 85% are easy to achieve.
External shutdown is included, featuring an ultra-low
stand-by current of 30nA. The LM2734Z 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 trademark of Texas Instruments, Inc..
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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.
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