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The Future of Analog IC Technology
MP2365
3A, 28V, 1.4MHz
Step-Down Converter
MP2365 Rev. 0.91
7/10/2006
www.MonolithicPower.com
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
DESCRIPTION
The MP2365 is a 1.4MHz step-down regulator
with a built-in Power MOSFET. It achieves 3A
continuous output current over a wide input
supply range with excellent load and line
regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-
cycle current limiting and thermal shutdown.
Adjustable soft-start reduces the stress on the
input source at turn-on. In shutdown mode the
regulator draws 20μA of supply current.
The MP2365 is available in an 8-pin SOIC
package with an exposed pad, and requires a
minimum number of readily available external
components to complete a 3A step-down DC to
DC converter solution.
EVALUATION BOARD REFERENCE
Board Number
EV2365DN-00A
Dimensions
2.0” x 1.9” x 0.4”
FEATURES
3A Continuous Output Current, 4A Peak
Output Current
Programmable Soft-Start
100m
Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 90% Efficiency
20μA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 28V Operating Input Range
Output is Adjustable From 0.92V to 21V
Under Voltage Lockout
APPLICATIONS
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 28V
OUTPUT
3.3V
3A
MP2365
BS
IN
FB
SW
SS
GND
COMP
EN
1
3
5
6
4
8
7
2
OPEN
OPEN =
AUTOMATIC
STARTUP
5.6nF
10nF
B330A
Efficiency Curve
100
90
80
70
60
E
0
0.5
1.0
1.5
2.0
2.5
3.0
LOAD CURRENT (A)
V
IN
=12V
V
OUT
=3.3V
V
OUT
=5V
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