MP2303_06 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter

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 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 1µA.
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
C5
10nF
BS
SS
IN
EN
MP2303
SW COMP
GND
FB
C3
3.3nF
VOUT
5V/3A
MP2303_TAC01
Efficiency vs
Load Current
100
VIN = 12V
90
VIN = 24V
80
70
60
50
0
VOUT = 5V
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MP2303-EC01
MP2303 Rev. 0.92
www.MonolithicPower.com
1
5/2/2006
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© 2006 MPS. All Rights Reserved.