LM2734
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SNVS288I – SEPTEMBER 2004 – REVISED APRIIL 2013
LM2734 Thin SOT 1A Load Step-Down DC-DC Regulator
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LM2734
1
FEATURES
DESCRIPTION
The LM2734 regulator is a monolithic, high frequency,
234
•
Thin SOT-6 Package
PWM step-down DC/DC converter in a 6-pin Thin
•
3.0V to 20V Input Voltage Range
SOT package. It provides all the active functions to
•
0.8V to 18V Output Voltage Range
provide local DC/DC conversion with fast transient
response and accurate regulation in the smallest
•
1A Output Current
possible PCB area.
•
550kHz (LM2734Y) and 1.6MHz (LM2734X)
With a minimum of external components and online
Switching Frequencies
design support through WEBENCH
®
, the LM2734 is
•
300m
Ω
NMOS Switch
easy to use. The ability to drive 1A loads with an
•
30nA Shutdown Current
internal 300m
Ω
NMOS switch using state-of-the-art
•
0.8V, 2% Internal Voltage Reference
0.5µm BiCMOS technology results in the best power
density available. The world class control circuitry
•
Internal Soft-Start
allows for on-times as low as 13ns, thus supporting
•
Current-Mode, PWM Operation
exceptionally high frequency conversion over the
•
WEBENCH
®
Online Design Tool
entire 3V to 20V input operating range down to the
minimum output voltage of 0.8V. Switching frequency
•
Thermal Shutdown
is internally set to 550kHz (LM2734Y) or 1.6MHz
•
LM2734XQ/LM2734YQ are AEC-Q100 Grade 1
(LM2734X), allowing the use of extremely small
Qualified and are Manufactured on an
surface mount inductors and chip capacitors. Even
Automotive Grade Flow
though the operating frequencies are very high,
efficiencies up to 90% are easy to achieve. External
APPLICATIONS
shutdown is included, featuring an ultra-low stand-by
current of 30nA. The LM2734 utilizes current-mode
•
Local Point of Load Regulation
control and internal compensation to provide high-
•
Core Power in HDDs
performance
regulation
over
a
wide
range
of
•
Set-Top Boxes
operating
conditions.
Additional
features
include
internal soft-start circuitry to reduce inrush current,
•
Battery Powered Devices
pulse-by-pulse current limit, thermal shutdown, and
•
USB Powered Devices
output over-voltage protection.
•
DSL Modems
•
Notebook Computers
•
Automotive
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.
2
WEBENCH is a registered trademark of Texas Instruments, Inc..
3
WEBENCH is a registered trademark of Texas Instruments.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2013, 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.