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LM2734

更新时间: 2024-11-05 12:02:11
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德州仪器 - TI 稳压器
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31页 1184K
描述
LM2734 Thin SOT 1A Load Step-Down DC-DC Regulator

LM2734 数据手册

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LM2734  
www.ti.com  
SNVS288I SEPTEMBER 2004REVISED APRIIL 2013  
LM2734 Thin SOT 1A Load Step-Down DC-DC Regulator  
Check for Samples: LM2734  
1
FEATURES  
DESCRIPTION  
The LM2734 regulator is a monolithic, high frequency,  
PWM step-down DC/DC converter in a 6-pin Thin  
SOT 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.  
234  
Thin SOT-6 Package  
3.0V to 20V Input Voltage Range  
0.8V to 18V Output Voltage Range  
1A Output Current  
550kHz (LM2734Y) and 1.6MHz (LM2734X)  
Switching Frequencies  
With a minimum of external components and online  
design support through WEBENCH®, the LM2734 is  
easy to use. The ability to drive 1A loads with an  
internal 300mNMOS 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 550kHz (LM2734Y) or 1.6MHz  
(LM2734X), allowing the use of extremely small  
surface mount inductors and chip capacitors. Even  
though the operating frequencies are very high,  
efficiencies up to 90% are easy to achieve. External  
shutdown is included, featuring an ultra-low stand-by  
current of 30nA. The LM2734 utilizes current-mode  
control and internal compensation to provide high-  
300mNMOS Switch  
30nA Shutdown Current  
0.8V, 2% Internal Voltage Reference  
Internal Soft-Start  
Current-Mode, PWM Operation  
WEBENCH® Online Design Tool  
Thermal Shutdown  
LM2734XQ/LM2734YQ are AEC-Q100 Grade 1  
Qualified and are Manufactured on an  
Automotive Grade Flow  
APPLICATIONS  
Local Point of Load Regulation  
Core Power in HDDs  
Set-Top Boxes  
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.  
Battery Powered Devices  
USB Powered Devices  
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.  
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WEBENCH is a registered trademark of Texas Instruments, Inc..  
WEBENCH is a registered trademark of Texas Instruments.  
All other trademarks are the property of their respective owners.  
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 © 2004–2013, Texas Instruments Incorporated  

LM2734 替代型号

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