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MP38873

更新时间： 2024-11-29 17:01:43
品牌 Logo 应用领域
芯源 - MPS 栅极驱动驱动器
页数 文件大小 规格书
14页 373K
描述
15A，16V高频降压变换器，具有同步栅极驱动器

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中文翻译

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MP38873 数据手册

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MP38873  
15A, 16V, High Frequency Step-Down  
Converter with Synchronous Gate Driver  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The MP38873 is a monolithic step-down switch  
mode converter with a built in internal power  
MOSFET. It achieves 15A continuous output  
current over a wide input supply range with  
excellent load and line regulation.  
•
•
•
•
•
Wide 4.5V to 16V Operating Input Range  
15A Output Current  
25mΩ Internal Power MOSFET Switch  
Synchronous Gate Driver  
Synch from 300KHz to > 1MHz External Clock or  
400KHz Fixed Switching Frequency  
Synch Output to Drive Another Regulator in  
Phase-Shift Operation  
Feedback Voltage Accuracy: 2%  
Programmable Soft-Start  
Current mode operation provides fast transient  
response and eases loop stabilization.  
•
Fault condition protection includes cycle-by-cycle  
current limiting and thermal shutdown.  
•
•
•
•
•
•
•
•
The MP38873 requires a minimum number of  
readily available standard external components  
and is available in a 20-pin 3mm x 4mm QFN  
package.  
Startup Tracking  
EN and Power Good for Power Sequencing  
Cycle-by-Cycle Over Current Protection  
Thermal Shutdown  
Output Adjustable from 0.8V to 12V  
Stable with Low ESR Output Ceramic  
Capacitors  
The MP38873 is ideal for a wide range of  
applications including distributed power systems,  
pre-regulator for linear regulators, compact DC-  
DC regulators for PCB space limited platforms.  
•
Available in a 3mm x 4mm QFN Package  
APPLICATIONS  
•
•
•
Distributed Power Systems  
Pre-Regulator for Linear Regulators  
Compact DC-DC Regulator for PCB Space  
Limited Platforms  
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of  
Monolithic Power Systems, Inc.  
TYPICAL APPLICATION  
V
CC  
Efficiency vs. Output Current  
VIN=12V,VOUT=1.2V  
System  
95  
V
IN  
PG  
BST  
IN  
90  
85  
V
OUT  
SW  
BG  
1.2V/15A  
COMP  
VCC  
80  
75  
70  
65  
60  
55  
50  
M2  
R3  
MP38873  
SS/TRK  
C6  
C3  
FB  
EN  
OFF ON  
SYNCIN  
SYNCOUT GND  
0
2
4
6
8
10 12 14 16  
OUTPUT CURRENT(A)  
MP38873 Rev. 0.9  
9/17/2009  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2009 MPS. All Rights Reserved.  
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