MP28368 Datasheet, PDF (1/8 Pages) Monolithic Power Systems – 1.8A, 24V, 1.4MHz Step-Down Converter

TM
The Future of Analog IC Technology ^TM
DESCRIPTION
The MP28368 is a monolithic step-down switch
mode converter with a built-in internal power
MOSFET. It achieves 1.8A 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.
The MP28368 requires a minimum number of
readily available standard external components.
The MP28368 is available in a 2mm x 2mm
QFN8 package.
MP28368
1.8A, 24V, 1.4MHz
Step-Down Converter
FEATURES
• 2.5A Peak Output Current
• 1.8A Continuous Output Current
• 0.3Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• 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 2x2 QFN8 Packages
APPLICATIONS
• Broadband Communications Equipment
• Digital Entertainment Systems
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V_IN
OFF ON
3
IN
7
BST
CB
10nF
2
SW
MP28368
D1
B230A
4
EN
GND
6
5
FB
V_OUT
3.3V
Efficiency vs
Load Current
100
90
VOUT = 3.3V
80
VOUT = 2.5V
70
60
VIN = 12V
50
0
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
MP28368 Rev. 0.9
www.MonolithicPower.com
1
12/13/2007
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