MP28368 Datasheet: Step-Down Converter





MP28368 Step-Down Converter Datasheet

Part Number MP28368
Description Step-Down Converter
Manufacture MPS
Total Page 8 Pages
PDF Download Download MP28368 Datasheet PDF

Features: TM The Future of Analog IC Technology TM DESCRIPTION The MP28368 is a monolithi c step-down switch mode converter with a built-in internal power MOSFET. It ac hieves 1.8A continuous output current o ver a wide input supply range with exce llent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cy cle-by-cycle current limiting and therm al shutdown. The MP28368 requires a min imum number of readily available standa rd external components. The MP28368 is available in a 2mm x 2mm QFN8 package. MP28368 1.8A, 24V, 1.4MHz Step-Down Co nverter FEATURES • 2.5A Peak Output C urrent • 1.8A Continuous Output Curre nt • 0.3Ω Internal Power MOSFET Swi tch • Stable with Low ESR Output Cera mic Capacitors • 0.1μA Shutdown Mode • Fixed 1.4MHz Frequency • Thermal Shutdown • Cycle-by-Cycle Over Curre nt Protection • Wide 4.5V to 24V Oper ating Input Range • Output Adjustable from 0.81V to 15V • Available in 2x2 QFN8 Pack.

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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
0.3Internal 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
VIN
OFF ON
3
IN
7
BST
CB
10nF
2
MP28368 SW
D1
B230A
4 EN
GND
6
5
FB
VOUT
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
12/13/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
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