MP2354_06 Datasheet, PDF (1/10 Pages) Monolithic Power Systems – 2A, 23V, 380KHz Step-Down Converter

TM
The Future of Analog IC Technology ^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
EV2354DS-00A
Dimensions
2.3”X x 1.4”Y x 0.5”Z
MP2354
2A, 23V, 380KHz
Step-Down Converter
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
INPUT
4.75V to 23V
OPEN
AUTOMATIC
STARTUP
OPEN
IF NOT USED
10nF
3
2
VIN
8 _RUN
BST
LX ⁴
MP2354
1 _SYNC
FB ⁶
GND
COMP
5
7
3.3nF
B230A
OUTPUT
3.3V / 2A
MP2354_TAC_S01
Efficiency vs
Output Current
95
90
5.0V
85
3.3V
80
2.5V
75
70
65
60
0
0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT (A)
MP2354_TAC_EC01
MP2354 Rev. 1.4
www.MonolithicPower.com
1
1/6/2006
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© 2006 MPS. All Rights Reserved.