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MP2355
3A, 23V, 380KHz
Step-Down Converter
The Future of Analog IC Technology
MP2355 Rev. 1.5
5/1/2006
www.MonolithicPower.com
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
TM
DESCRIPTION
The MP2355 is a step-down regulator with a
built in internal 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
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.
cycle-by-cycle
The MP2355 uses a minimum number of
readily available external components to
complete a 3A step-down DC to DC converter
solution.
EVALUATION BOARD REFERENCE
Board Number
EV2355DN-00A
Dimensions
2.0”X x 1.3”Y x 0.5”Z
FEATURES
Programmable Soft-Start
100m
Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 95% Efficiency
20μA Shutdown Mode
3A Output Current
Wide 4.75V to 23V Operating Input Range
Fixed 380KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Under Voltage Lockout
APPLICATIONS
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP2355
LX
VIN
BST
FB
7
5
3
2
4
6
1
8
SS
COMP
GND
RUN
OUTPUT
3.3V / 3A
INPUT
4.75V to 23V
OPEN
AUTOMATIC
STARTUP
MP2355_TAC_S01
10nF
4.7nF
10nF
D1
B330A
E
95
90
85
80
75
70
65
60
LOAD CURRENT (mA)
MP2355_EC01
Efficiency vs
Load Current
0
1500
1000
500
2000
3500
3000
2500
V
OUT
=2.5V
V
OUT
=3.3V
V
OUT
=5.0V
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