MP2351DK-LF-Z Datasheet, PDF (1/8 Pages) MPS Industries, Inc. – 1.5A, 23V, 1.4MHz Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MP2351 is a monolithic step down switch
mode converter with a built in internal power
MOSFET. It achieves 1.5A 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, short circuit frequency foldback
and thermal shutdown. In shutdown mode the
regulator draws 20μA of supply current.
The MP2351 requires a minimum number of
readily available standard external components.
EVALUATION BOARD REFERENCE
Board Number
EV2351DQ-00A
Dimensions
2.3”X x 1.5”Y x 0.5”Z
MP2351
1.5A, 23V, 1.4MHz
Step-Down Converter
FEATURES
• 1.5A Output Current
• 0.18Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 93% Efficiency
• 20μA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.75V to 23V Operating Input Range
• Output Adjustable from 1.23V to 16V
• Programmable Under Voltage Lockout
• Frequency Synchronization Input
• Available in QFN (3mm x 3mm) and tiny
10-Pin MSOP Packages
• Evaluation Board Available
APPLICATIONS
• Distributed Power Systems
• Battery Charger
• DSL Modems
• 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 - 23V
OPEN
AUTOMATIC
STARTUP
OPEN
NOT USED
C5
10nF
4
2
IN
9 _EN
BS
SW ⁵
MP2351
10 _SYNC
FB ⁷
GND
COMP
6
8
C3
1nF
C6
OPEN
D1
B220A
V_OUT
3.3V/1.5A
MP2351_TAC_S01
Efficiency vs
Load Current
100
V_OUT=5V
90
80
V_OUT=2.5V
70
V_OUT=3.3V
60
50
40
0
300 600 900 1200 1500
LOAD CURRENT (mA)
MP2351-EC01
MP2351 Rev. 1.6
www.MonolithicPower.com
1
9/21/2007
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© 2007 MPS. All Rights Reserved.