MP28252 Datasheet: Step-Down Converter





MP28252 Step-Down Converter Datasheet

Part Number MP28252
Description Step-Down Converter
Manufacture MPS
Total Page 14 Pages
PDF Download Download MP28252 Datasheet PDF

Features: The Future of Analog IC Technology DESCR IPTION The MP28252 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 2A continuous outpu t current over a wide input supply rang e with excellent load and line regulati on. The MP28252 has synchronous mode op eration for higher efficiency over outp ut current load range. Current mode ope ration provides fast transient response and eases loop stabilization. Full pro tection features include OCP and therma l shut down. The MP28252 requires a min imum number of readily available standa rd external components and is available in a space saving 3mm x 4mm 14-pin QFN package. MP28252 High Efficiency 2A, 21V, 500kHz Synchronous Step-down Conve rter FEATURES • Wide 4.5V to 21V Oper ating Input Range • 2A Output Current • Low Rds(on) Internal Power MOSFETs • Proprietary Switching Loss Reducti on Technique • High Efficiency Synchronous Mode Operation • Fixed 500kH.

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The Future of Analog IC Technology
DESCRIPTION
The MP28252 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 2A continuous
output current over a wide input supply range
with excellent load and line regulation. The
MP28252 has synchronous mode operation for
higher efficiency over 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 MP28252 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
MP28252
High Efficiency 2A, 21V, 500kHz
Synchronous Step-down Converter
FEATURES
Wide 4.5V to 21V Operating Input Range
2A Output Current
Low Rds(on) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
High Efficiency Synchronous Mode Operation
Fixed 500kHz Switching Frequency
Sync from 300kHz to 2MHz External Clock
Internal Compensation
Integrated Bootstrap Diode
OCP Protection and Thermal Shutdown
Output Adjustable from 0.805V
Available in a 3mm x 4mm 14-Pin QFN
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
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
1 IN
BST 6
10
R3
100K
VCC
MP28252
SW
2, 3
4, 5
PG
9 PG
FB 8
Rt
25K
EN 7 EN/SYNC
GND
11, 12, 13, 14
VOUT
1.2V@2A
R1
5K
R2
10K
Efficiency vs. Output Current
100 VOUT=1.2V
90
80
70 VIN=12V VIN=5V
60
50 VIN=21V
40
30
20
10
0
0 0.5
1 1.5
2
OUTPUT CURRENT (A)
MP28252 Rev. 1.11
www.MonolithicPower.com
9/16/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
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