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MP1543

更新时间： 2024-01-18 04:01:44
品牌 Logo 应用领域
芯源 - MPS 转换器升压转换器
页数 文件大小 规格书
9页 290K
描述
1.5A, 500KHz Synchronous Rectified Step-up Converter

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MP1543 数据手册

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TM  
MP1543  
1.5A, 500KHz Synchronous  
Rectified Step-up Converter  
TM  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The MP1543 is a highly efficient, synchronous,  
fixed frequency, current-mode step-up converter  
with output to input disconnect, inrush current  
limiting and internal soft-start. It includes an error  
amplifier, ramp generator, comparator, N-Channel  
switch and P-Channel synchronous rectified  
switch (which greatly improves efficiency). The  
output disconnect feature allows the output to be  
completely isolated from the input in shutdown  
mode.  
•
•
•
•
•
•
•
•
•
•
Over 90% Efficiency  
Output to Input Disconnect at Shutdown Mode  
Internal Synchronous Rectifier  
Inrush Current Limiting and Internal Soft-Start  
Internal Compensation  
1.5A Typical Switch Current Limit  
500KHz Fixed Switching Frequency  
Zero Current Shutdown Mode  
Thermal Shutdown  
5-Pin TSOT-23 Package  
The 500KHz switching frequency allows for  
APPLICATIONS  
smaller external components producing  
a
compact solution for a wide range of load  
currents. The internal compensation and soft-start  
minimizes the external component count and  
limits the inrush current during startup. The  
MP1543 regulates the output voltage up to 6V  
and provides up to 400mA from a 2-cell AA with  
a 3.3V output.  
•
•
•
•
•
MP3 Players  
Handheld Computers and PDAs  
Digital Still and Video Cameras  
External Modems  
Small LCD Displays  
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic  
Power Systems, Inc.  
The MP1543 is offered in a thin SOT23-5  
package.  
EVALUATION BOARD REFERENCE  
Board Number  
Dimensions  
EV1543DJ-01A  
2.4”X x 2.4”Y x 0.4”Z  
TYPICAL APPLICATION  
Efficiency vs  
Load Current  
100  
V
V
=3V  
IN  
IN  
1.8V - 3.2V  
90  
80  
70  
60  
50  
40  
30  
4
SW  
3
1
V
3.3V  
400mA  
OUT  
FB  
OUT  
V
=2.4V  
IN  
5
EN  
EN  
MP1543  
V
=1.8V  
IN  
GND  
V
=3.3V  
2
OUT  
1
10  
100  
1000  
LOAD CURRENT (mA)  
MP1543-EC01  
MP1543 Rev. 1.0  
1/11/2006  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2006 MPS. All Rights Reserved.  
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