MP28251 Datasheet | Synchronous Step-Down Converter





MP28251 PDF File (Datasheet) Download

Part Number MP28251
Description Synchronous Step-Down Converter
Manufacture MPS
Total Page 15 Pages
PDF Download Download MP28251 PDF File

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The Future of Analog IC Technology
MP28251
20V, 4A Synchronous
Step-Down Converter
DESCRIPTION
The MP28251 is a synchronous, rectified, step-
down, switch-mode converter with internal
power MOSFETs. It offers a very compact
solution to achieve a 4A continuous output
current over a wide input supply range with
excellent load and line regulation. The
MP28251 has synchronous mode operation for
higher efficiency over the output current load
range.
Current-mode operation provides a fast
transient response and eases loop stabilization.
Full protection features include over-current
protection and thermal shutdown.
The MP28251 requires a minimal number of
readily-available standard external components
and is available in a space saving 2mm×3mm
14-pin QFN package.
TYPICAL APPLICATION
FEATURES
Wide 4.75V-to-20V Operating Input Range
4A Output Current
Low RDS(ON) Internal Power MOSFETs
Programmable Switching Frequency
Programmable EN Delay
Frequency SYNC from 300kHz to 2MHz
External Clock
Low Power Mode Selectable by an External
Signal
External Soft Start
OCP and Thermal Shutdown
Available in a 14-pin QFN2×3 Package
APPLICATIONS
DSL Modems
Cable Modems
Set Top Boxes
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.
VIN
VCC
ON
OFF EN
LPM
CDELAY
47nF
FREQ/SYNC
RFREQ
30.1k
U1
IN
VCC
R5
10
BS
SW
EN MP28251
LPM
FB
FREQ/SYNC
GND
SS
RT
0
CSS
22nF
3.3V VOUT
R1
30.1k
R2
10k
MP28251 Rev. 1.16
www.MonolithicPower.com
4/17/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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