MP2303ADN手册
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MP2303A
3A, 28V, 360kHz Synchronous Rectified
Step-Down Converter
MP2303A Rev.1.1 www.MonolithicPower.com 1
7/25/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2303A is a monolithic synchronous
buck regulator. The device integrates a 150mΩ
high-side MOSFET and a 80mΩ low-side
MOSFET that provide 3A continuous load
current over a wide operating input voltage of
4.7V 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 lower than 1μA.
This device, available in an 8-pin SOIC and
PDIP-8 packages, provides a very compact
system solution with minimal reliance on
external components.
FEATURES
3A Output Current
Wide 4.7V to 28V Operating Input Range
Integrated MOSFET Switches
Output Adjustable from 0.80V to 25V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Fixed 360kHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Available in thermally enhanced 8-Pin SOIC
and PDIP-8 packages
APPLICATIONS
Distributed Power Systems
Pre-Regulator for Linear Regulators
Notebook Computers
A
ll 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.
TYPICAL APPLICATION
C5
10nF
MP2303A
BSIN
12
3
5
64
8
7
FB
SW
SS
GND COMP
EN
40
50
60
70
80
90
100
OUTPUT CURRENT
0 0.5 1.0 1.5 2.0 2.5 3.53.0
V
IN
=5V
V
IN
=12V
V
IN
=24V
V
OUT
=3.3
V
IN
=28V
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