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MP38872

更新时间： 2024-11-27 01:20:35
品牌 Logo 应用领域
芯源 - MPS 栅
页数 文件大小 规格书
11页 360K
描述
6A, 21V, 600kHz Step-Down Converter with Synchronizable Gate Driver

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MP38872 数据手册

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MP38872  
6A, 21V, 600kHz Step-Down Converter  
with Synchronizable Gate Driver  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The MP38872 is a monolithic step-down switch  
mode converter with a built in high-side internal  
power MOSFET and a gate driver for a low-side  
external MOSFET. It achieves 6A continuous  
output current over a wide input supply range  
with excellent load and line regulation.  
•
•
•
•
•
Wide 4.5V to 21V Operating Input Range  
6A Output Current  
45mΩ Internal Power MOSFET Switch  
Power Good Indicator  
Synchronizable Gate Driver Delivers up to  
95% Efficiency  
•
•
•
•
•
•
Fixed 600kHz Frequency  
Current mode operation provides fast transient  
response and reliable over-current protection.  
Synchronizable to >1MHz External Clock  
Cycle-by-Cycle Over Current Protection  
Thermal Shutdown  
Output Adjustable from 0.8V  
Stable with Low ESR Output Ceramic  
Capacitors  
The MP38872 requires a minimum number of  
readily available standard external components  
and is available in a 14-pin QFN 3x4 package  
with exposed pad.  
•
Available in a Thermally Enhanced 14-Pin  
QFN 3x4 Package  
APPLICATIONS  
•
Point of Load Regulator in Distributed  
Power System  
•
•
•
•
Digital Set Top Boxes  
Personal Video Recorders  
Broadband Communications  
Flat Panel Television and Monitors  
For MPS green status, please visit MPS website under Quality Assurance.  
“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  
SW  
IN  
C4  
1uF  
16V  
100  
C1  
L1  
2.2uH  
22uF  
25V  
95  
8, 9, 10  
13  
V
OUT  
3.3V  
90  
85  
80  
75  
70  
65  
60  
55  
50  
12  
VCC  
M2  
C3  
1uF  
16V  
V
=12V  
IN  
MP38872 BG  
R3  
100kΩ  
R1  
40.2kΩ  
V
=20V  
IN  
2
3
Power Good  
OFF ON  
C2  
PG  
100uF  
6.3V  
1
EN/SYNC  
GND  
14  
FB  
R2  
13kΩ  
V
=3.3V  
5
OUT  
0
1
2
3
4
6
OUTPUT CURRENT (A)  
MP38872 Rev.1.11  
9/21/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
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