MP2354
2A, 23V, 380KHz
Step-Down Converter
MP2354 Rev. 1.4 www.MonolithicPower.com 1
1/6/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
DESCRIPTION
The MP2354 is a monolithic step down switch
mode converter with a built in internal power
MOSFET. It achieves 2A 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. In
shutdown mode the regulator draws 20µA of
supply current.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV2354DS-00A 2.3”X x 1.4”Y x 0.5”Z
FEATURES
• 0.18Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 95% Efficiency
• 2A Output Current
• Wide 4.75V to 23V Operating Input Range
• Fixed 380KHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Programmable Under Voltage Lockout
• Frequency Synchronization Input
• Operating Temperature: –40°C to +85°C
• Available in an 8-Pin SO Package
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
MP2354
LX
VIN BST
32
FB
4
6
SYNC
COMPGND
75
RUN
1
8
OUTPUT
3.3V / 2A
INPUT
4.75V to 23V
OPEN
IF NOT USED
OPEN
AUTOMATIC
STARTUP
MP2354_TAC_S01
3.3nF
B230A
10nF
EFFICIENCY (%)
95
90
85
80
75
70
65
60
OUTPUT CURRENT (A)
MP2354_TAC_EC01
Efficiency vs
Output Current
0 1.00.5 1.5 2.0 2.5
5.0V
3.3V
2.5V
