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MP8725 Datasheet(PDF) 1 Page - Monolithic Power Systems

Part No. MP8725
Description  21V, 5A, 500kHz Synchronous Step-down Converter
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP8725 Datasheet(HTML) 1 Page - Monolithic Power Systems

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MP8725
21V, 5A, 500kHz
Synchronous Step-down Converter
MP8725 Rev. 1.0
www.MonolithicPower.com
1
9/21/2011
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP8725 is a high frequency synchronous
rectified step-down switch mode converter with
built in internal power MOSFETs. It offers a
very compact solution to achieve 5A continuous
output current over a wide input supply range
with excellent load and line regulation. The
MP8725 operates at high efficiency over a wide
output current load range.
Current mode operation provides fast transient
response and eases loop stabilization.
Full protection features include OCP and thermal
shut down.
The MP8725 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
FEATURES
• Wide 4.5V to 21V Operating Input Range
• 5A Output Current
• Low RDS(ON) Internal Power MOSFETs
• Proprietary
Switching
Loss
Reduction
Technique
• Fixed 500kHz Switching Frequency
• Sync from 300kHz to 2MHz External Clock
• Internal Compensation
• OCP Protection and Thermal Shutdown
• Output Adjustable from 0.8V
• Available in 14-pin QFN3x4 Package
APPLICATIONS
Notebook Systems and I/O Power
Networking Systems
Digital Set Top Boxes
Personal Video Recorders
Flat Panel Television and Monitors
Distributed Power Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
The information in this datasheet about the product and its associated
technologies are proprietary and intellectual property of Monolithic Power
Systems and are protected by copyright and pending patent applications.
TYPICAL APPLICATION (FOR NOTEBOOK)
C1
22uF
MP8725
SW
GND
AGND
NC
FB
EN/SYNC
IN
BST
VCC
PG
PG
C4
0.1uF
R2
10K
Rt
24.9K
R1
4.99K
R3
100K
L1
2uH
C2
47uF
C3
0.1uF
VIN
ON/OFF
8
10
6
2,3,4,5
1
11
9
7
12,13
4.5V-21V
14
Efficiency
VOUT=1.2V
012
3
45
OUTPUT CURRENT (A)
0
10
20
30
40
50
60
70
80
90
100
Vin=21V
Vin=12V
Vin=5V


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