MP28253 Datasheet: Step-Down Converter





MP28253 Step-Down Converter Datasheet

Part Number MP28253
Description Step-Down Converter
Manufacture MPS
Total Page 15 Pages
PDF Download Download MP28253 Datasheet PDF

Features: The Future of Analog IC Technology DESCR IPTION The MP28253 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 3A continuous outpu t current over a wide input supply rang e with excellent load and line regulati on. The MP28253 operates at high effici ency over a wide output current load ra nge. Current mode operation provides fa st transient response and eases loop st abilization. Full protection features i nclude OCP and thermal shut down. The M P28253 requires a minimum number of rea dily available standard external compon ents and is available in a space saving 3mm x 4mm 14-pin QFN package. MP28253 21V, 3A, 500kHz Synchronous Step-down Converter FEATURES • Wide 4.5V to 21V Operating Input Range • 3A Output Cu rrent • Low RDS(ON) Internal Power MO SFETs • Proprietary Switching Loss Re duction Technique • Fixed 500kHz Swit ching Frequency • External Soft-Start • Sync from 300kHz to 2MHz External.

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The Future of Analog IC Technology
DESCRIPTION
The MP28253 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 3A continuous
output current over a wide input supply range
with excellent load and line regulation. The
MP28253 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 MP28253 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
MP28253
21V, 3A, 500kHz
Synchronous Step-down Converter
FEATURES
Wide 4.5V to 21V Operating Input Range
3A Output Current
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
Fixed 500kHz Switching Frequency
External Soft-Start
Sync from 300kHz to 2MHz External Clock
Internal Compensation
Integrated Bootstrap Diode
Over-Current Protection and Hiccup
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
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.
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
VIN
4.5V-21V
1 IN
BST 6
C1 MP28253
PG
R3
100k
ON/OFF
9 PG
SW 2,3,4,5
11 VCC
7 EN/SYNC
FB 8
SS 10
C5
47nF
GND AGND
12,13 14
Rt
24k
R1
4.99k
VOUT 1.2V/3A
R2
10k
MP28253 Rev. 1.03
www.MonolithicPower.com
9/16/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
1

                    
                    






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