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MP38870

更新时间： 2024-11-27 01:20:31
品牌 Logo 应用领域
芯源 - MPS 栅
页数 文件大小 规格书
10页 543K
描述
3A, 14V, 600KHz Step-Down Converter with Synchronizable Gate Driver

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MP38870  
3A, 14V, 600KHz Step-Down Converter  
with Synchronizable Gate Driver  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The MP38870 is a monolithic step-down switch  
mode converter with a built in internal high-side  
power MOSFET. It achieves 3A continuous  
output current over a wide input supply range  
with excellent load and line regulation.  
•
•
•
•
•
Wide 4.5V to 14V Operating Input Range  
3A Continuous Output Current  
80mΩ Internal Power MOSFET Switch  
Power Good Indicator  
Synchronous Gate Driver Delivers up to  
95% Efficiency  
Fixed 600KHz Frequency  
External Synchronous Option: 250kHz-  
1.5MHz  
Cycle-by-Cycle Over Current Protection  
Thermal Shutdown  
Output Adjustable from 0.8V  
Stable with Low ESR Output Ceramic  
Capacitors  
Current mode operation provides fast transient  
response and reliable over current protection.  
•
•
Fault condition protection includes cycle-by-cycle  
current limiting and thermal shutdown.  
•
•
•
•
The MP38870 requires a minimum number of  
readily available standard external components  
and is available in a space saving 3mm x 4mm  
14-pin QFN package.  
•
Available in a 3mm x 4mm 14-Pin QFN  
Package  
APPLICATIONS  
•
Point of Load Regulator in Distributed  
Power System  
•
•
•
•
Digital Set Top Boxes  
Personal Video Recorders  
Broadband Communications  
Flat Panel Television and Monitors  
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of  
Monolithic Power Systems, Inc.  
TYPICAL APPLICATION  
Efficiency vs.  
Output Current  
4, 5, 6  
11  
V
IN  
BST  
IN  
100  
V
=5V  
IN  
95  
90  
85  
12  
2
8, 9, 10  
13  
V
OUT  
3.3V @ 3A  
VCC  
PG  
SW  
BG  
V
=12V  
IN  
80  
75  
70  
1
3
FB  
EN/SYNC  
OFF ON  
GND  
65  
60  
V
=3.3V  
OUT  
14  
0
1
2
3
4
OUTPUT CURRENT (A)  
MP38870 Rev. 1.1  
10/22/2009  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2009 MPS. All Rights Reserved.  
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