MP2303A Datasheet, PDF (1/15 Pages) Monolithic Power Systems – 3A, 28V, 360kHz Synchronous Rectified Step-Down Converter

The Future of Analog IC Technology
MP2303A
3A, 28V, 360kHz Synchronous Rectified
Step-Down Converter
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
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.
TYPICAL APPLICATION
C5
10nF
2
7
IN
EN
1
BS
SW
3
MP2303A
8 _SS
FB ⁵
GND
COMP
4
6
100
90
V_IN=5V
V_IN=12V
80
V_IN=28V
V_IN=24V
70
60
50
V_OUT=3.3
40
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT CURRENT
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.