TM
MP2359
1.2A, 24V, 1.4MHz
Step-Down Converter in a TSOT23-6
The Future of Analog IC Technology
TM
DESCRIPTION
The MP2359 is a monolithic step-down switch
mode converter with a built-in power MOSFET.
It achieves 1.2A peak 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.
The MP2359 requires a minimum number of
readily available standard external components.
The MP2359 is available in TSOT23-6 and
SOT23-6 packages.
FEATURES
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1.2A Peak Output Current
0.35Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 92% Efficiency
0.1µA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.5V to 24V Operating Input Range
Output Adjustable from 0.81V to 15V
Available in TSOT23-6 and SOT23-6
Packages
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
WLED Drivers
EVALUATION BOARD REFERENCE
Board Number
EV2359DJ-00B
Dimensions
2.1”X x 1.9”Y x 0.4”Z
APPLICATIONS
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“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
Load Currents
12V
V
IN
5
IN
BST
1
100
CB
10nF
90
80
V
IN
= 12V
MP2359
OFF ON
4
EN
SW
EFFICIENCY (%)
6
D1
B230A
FB
3
V
OUT
3.3V @ 1.2A
70
60
50
40
30
20
10
0
0.01
V
IN
= 24V
GND
2
V
OUT
= 5V
0.1
1
LOAD CURRENT (A)
10
MP2359 Rev. 1.1
6/23/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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