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| MP28265 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 21V, 5A, 1.1MHz Synchronous Step-down Converter | |||
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The Future of Analog IC Technology
MP28265
21V, 5A, 1.1MHz
Synchronous Step-down Converter
DESCRIPTION
The MP28265 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
MP28265 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 MP28265 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 1.1MHz Switching Frequency
⢠Sync from 400kHz 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
âMPSâ and âThe Future of Analog IC Technologyâ 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 ï¼FOR NOTEBOOKï¼
4.5V-21V
VIN
1
IN
6
BST
PG
ON/OFF
9 PG
R3
100K
11 VCC
MP28265
7
EN/SYNC
2,3,4,5
SW
8
FB
NC GND AGND
10
12,13 14
Rt
24.9K
R1
4.99K
R2
10K
Efficiency
VOUT=1.2V
100
90
VIN=5V
80
VIN=12V
70
60
VIN=21V
50
40
30
20
10
0
0123456
OUTPUT CURRENT(A)
MP28265 Rev. 0.92
www.MonolithicPower.com
1
12/2/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
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