mp2303,MP2303ADN
MPS
2013
SOP
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MP2303
3A, 28V, 340KHz Synchronous Rectified
Step-Down Converter
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
MP2303 Rev. 0.92 www.MonolithicPower.com 1
5/2/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
? 2006 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
DESCRIPTION
The MP2303 is a monolithic synchronous buck
regulator. The device integrates power
MOSFETS that provide 3A continuous load
current over a wide operating input voltage of
4.75V to 28V. Current mode control provides
fast transient response and cycle-by-cycle
current limit.
An adjustable soft-start prevents inrush current
at turn-on. In shutdown mode, the supply
current drops to 1?A.
This device, available in 8-pin SOIC and 3x3
10-pin QFN packages, provides a very compact
system solution with minimal reliance on
external components.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV2303DN-00A 2.0”X x 1.5”Y x 0.5”Z
FEATURES
? 3A Output Current
? Wide 4.75V to 28V Operating Input Range
? Integrated Power MOSFET Switches
? Output Adjustable from 0.8V to 25V
? Up to 95% Efficiency
? Programmable Soft-Start
? Stable with Low ESR Ceramic Output Capacitors
? Fixed 340KHz Frequency
? Cycle-by-Cycle Over Current Protection
? Input Under Voltage Lockout
? Thermally Enhanced 8-Pin SOIC and
3x3 QFN10 Packages
APPLICATIONS
? Distributed Power Systems
? Pre-Regulator for Linear Regulators
? Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
VIN
4.75V-28V
VOUT
5V/3A
C5
10nF
C3
3.3nF
MP2303
BS SS
EN
COMP
FB
IN
SW
GND
MP2303_TAC01
100
90
80
70
60
50
EFFICIENCY
(%)
0 0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MP2303-EC01
Efficiency vs
Load Current
VIN = 12V
VIN = 24V
VOUT = 5V
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