TM
MP2303
3A, 28V, 340KHz Synchronous Rectified
Step-Down Converter
The Future of Analog IC Technology
TM
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
DESCRIPTION
The MP2303 is a monolithic synchronous buck
regulator. The device integrates 120mΩ
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 1µA.
This device, available in an 8-pin SOIC
package, provides a very compact system
solution with minimal reliance on external
components.
FEATURES
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3A Output Current
Wide 4.75V to 28V Operating Input Range
Integrated 120mΩ 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 Package
Distributed Power Systems
Pre-Regulator for Linear Regulators
Notebook Computers
APPLICATIONS
EVALUATION BOARD REFERENCE
Board Number
EV2303DN-00A
Dimensions
2.0”X x 1.5”Y x 0.5”Z
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
Load Current
C5
10nF
100
1
2
3
4
BS
IN
SW
GND
SS
EN
COMP
FB
8
7
6
5
V
IN
= 12V
90
MP2303
EFFICIENCY (%)
VIN
4.75V-28V
80
70
60
V
IN
= 24V
C3
3.3nF
C6
(optional)
VOUT
5V/3A
V
OUT
= 5V
0
0.5
1.0
1.5
2.0
2.5
3.0
50
MP2303_TAC01
LOAD CURRENT (A)
MP2303-EC01
MP2303 Rev. 0.91
3/10/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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