MP2377 Datasheet, PDF (1/11 Pages) Monolithic Power Systems – 3A, 21V, 600kHz Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MP2377 is a monolithic step-down switch
mode converter with a built in high-side power
MOSFET. It achieves 3A 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 current limiting
and thermal shutdown.
The MP2377 requires a minimum number of
readily available standard external components
and is available in 8-pin SOIC packages with
exposed pad.
MP2377
3A, 21V, 600kHz
Step-Down Converter
FEATURES
• Wide 4.5V to 21V Operating Input Range
• 3A Output Current
• 100mΩ Internal Power MOSFET Switch
• Power Good Indicator
• Fixed 600kHz Frequency
• Synchronizable to >1MHz External Clock
• Over Current Latch Off Protection
• Thermal Shutdown
• Output Adjustable from 0.81V
• Stable with Low ESR Output Ceramic
Capacitors
• Available in Thermally Enhanced 8-Pin
SOIC Packages
• Supports Soft-Start into Pre-Biased Output
APPLICATIONS
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
8
V_IN
IN
2
BST
POWER
GOOD
OFF ON
3
VCC
1
MP2377 ^SW
6
PG
7
EN/SYNC
GND
4
5
FB
Efficiency vs
Load Current
100
80
V_IN=12V
60
V_IN=5V
40
20
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
MP2377 Rev. 0.92
www.MonolithicPower.com
1
4/19/2011
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.