MP28275 Datasheet: Step-Down Converter





MP28275 Step-Down Converter Datasheet

Part Number MP28275
Description Step-Down Converter
Manufacture MPS
Total Page 14 Pages
PDF Download Download MP28275 Datasheet PDF

Features: The Future of Analog IC Technology DESCR IPTION The MP28275 is a high frequency synchronous rectified step-down switch mode converter with built-in internal p ower MOSFETs. It offers a very compact solution to achieve 5A continuous outpu t current with excellent load and line regulation. The MP28275 operates at hig h efficiency over a wide output current load range. Current mode operation pro vides fast transient response and eases loop stabilization. Full protection fe atures include OCP and thermal shut dow n. The MP28275 requires a minimum numbe r of readily available standard externa l components and is available in a spac e saving 3mm x 4mm 14-pin QFN package. MP28275 7V, 5A, 1.1MHz Synchronous Ste p-down Converter FEATURES  4.5V to 7 V Operating Input Range  5A Output C urrent  Low RDS(ON) Internal Power M OSFETs  Proprietary Switching Loss R eduction Technique  Fixed 1.1MHz Swi tching Frequency  Sync from 300kHz t o 2MHz External Clock  Internal Compensation  Thermal Shutdown  Over-Cur.

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The Future of Analog IC Technology
DESCRIPTION
The MP28275 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 with excellent load and line
regulation. The MP28275 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 MP28275 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
MP28275
7V, 5A, 1.1MHz
Synchronous Step-down Converter
FEATURES
4.5V to 7V Operating Input Range
5A Output Current
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
Fixed 1.1MHz Switching Frequency
Sync from 300kHz to 2MHz External Clock
Internal Compensation
Thermal Shutdown
Over-Current-Protection and Hiccup
Output Adjustable from 0.8V
Available in 3x4mm QFN14 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
1 IN
BST 6
C3
0.1uF
C1
22uF
11
R3
100K
VCC
MP28275
C4
0.1uF
SW
2, 3
4, 5
L1
1.2uH
PG
9 PG
FB 8
Rt
25K
EN 7 EN/SYNC
GND
12, 13, 14
VOUT
1.2V@5A
R1
5K
C2
47uF
R2
10K
Efficiency
VOUT=1.2V
100
90 VIN=5V
80
70 VIN=7V
60
50
40
30
20
10
0
012
3
4
OUTPUT CURRENT (A)
5
MP28275 Rev. 1.0
www.MonolithicPower.com
5/29/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1

                    
                    






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