MP38891 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 6A, 30V, 420kHz Step-Down Converter with Synchronizable Gate Driver

The Future of Analog IC Technology
MP38891
6A, 30V, 420kHz Step-Down Converter
with Synchronizable Gate Driver
DESCRIPTION
The MP38891 is a monolithic step-down switch
mode converter with a built in internal power
MOSFET. It achieves 6A 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 MP38891 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
FEATURES
• Wide 4.5V to 30V Operating Input Range
• 6A Output Current
• 50mΩ Internal Power MOSFET Switch
• Synchronizable Gate Driver Delivers up to
95% Efficiency
• Fixed 420kHz Frequency
• Synchronizable up to 1.4MHz
• Cycle-by-Cycle Over Current Protection
• Thermal Shutdown
• Output Adjustable from 0.8V to 15V
• Stable with Low ESR Output Ceramic
Capacitors
• Available in a Thermally Enhanced 3mm x
4mm 14-Pin QFN Package
APPLICATIONS
• Digital Set Top Boxes
• Personal Video Recorders
• Broadband Communications
• Flat Panel Television and Monitors
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
V_IN
OFF ON
4,5,6
IN
11
BST
MP38891
12
VCC
SW ^8,9,10
13
BG
3 _EN/SYNC
2
PG
GND
14
1
FB
MP38891 Rev.1.1
www.MonolithicPower.com
1
9/21/2011
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