MP2359 Datasheet, PDF (1/9 Pages) Monolithic Power Systems – 1.2A, 24V, 1.4MHz Step-Down Converter in a TSOT23-6

TM
The Future of Analog IC Technology ^TM
MP2359
1.2A, 24V, 1.4MHz
Step-Down Converter in a TSOT23-6
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.
EVALUATION BOARD REFERENCE
Board Number
EV2359DJ-00B
Dimensions
2.1”X x 1.9”Y x 0.4”Z
FEATURES
• 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
APPLICATIONS
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
• WLED Drivers
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V_IN
12V
OFF ON
5
IN
1
BST
CB
10nF
6
SW
MP2359
D1
B230A
4
EN
GND
2
3
FB
V_OUT
3.3V @ 1.2A
Efficiency vs
Load Currents
100
VIN = 12V
90
80
70
VIN = 24V
60
50
40
30
20
10
0
0.01
VOUT = 5V
0.1
1
10
LOAD CURRENT (A)
MP2359 Rev. 1.1
www.MonolithicPower.com
1
6/23/2006
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© 2006 MPS. All Rights Reserved.