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1N4148W

更新时间： 2024-11-18 12:32:43
品牌 Logo 应用领域
德州仪器 - TI 稳压器二极管光电二极管IOT
页数 文件大小 规格书
31页 1178K
描述
LM2736 Thin SOT 750mA Load Step-Down DC-DC Regulator

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LM2736  
www.ti.com  
SNVS316F –SEPTEMBER 2004–REVISED APRIL 2013  
LM2736 Thin SOT 750mA Load Step-Down DC-DC Regulator  
Check for Samples: LM2736  
1
FEATURES  
DESCRIPTION  
The LM2736 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.  
23  
•
Thin SOT-6 Package  
•
3.0V to 18V Input Voltage Range  
1.25V to 16V Output Voltage Range  
750mA Output Current  
•
•
•
550kHz (LM2736Y) and 1.6MHz (LM2736X)  
Switching Frequencies  
With a minimum of external components and online  
design support through WEBENCH®, the LM2736 is  
easy to use. The ability to drive 750mA loads with an  
internal 350mΩ 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 18V input operating range down to the  
minimum output voltage of 1.25V. Switching  
frequency is internally set to 550kHz (LM2736Y) or  
1.6MHz (LM2736X), 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 LM2736 utilizes current-mode  
control and internal compensation to provide high-  
•
•
•
•
•
•
•
350mΩ NMOS Switch  
30nA Shutdown Current  
1.25V, 2% Internal Voltage Reference  
Internal Soft-Start  
Current-Mode, PWM Operation  
WEBENCH® Online Design Tool  
Thermal Shutdown  
APPLICATIONS  
•
•
•
•
•
•
•
Local Point of Load Regulation  
Core Power in HDDs  
Set-Top Boxes  
Battery Powered Devices  
USB Powered Devices  
DSL Modems  
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.  
Notebook Computers  
Typical Application Circuit  
Efficiency vs Load Current "X"  
VIN = 5V, VOUT = 3.3V  
D2  
V
BOOST  
SW  
V
IN  
IN  
C3  
D1  
L1  
C1  
V
OUT  
ON  
C2  
EN  
R1  
R2  
OFF  
FB  
GND  
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
3
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  
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