MP2108
2A, 6V, 740KHz
Synchronous Buck Converter
MP2108 Rev 1.1 www.MonolithicPower.com 1
10/2/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2108 is a 2A, 740KHz synchronous
buck converter designed for low voltage
applications requiring high efficiency. It is
capable of providing output voltages as low as
0.9V, and integrates top and bottom switches to
minimize power loss and component count. The
740KHz switching frequency allows for small
filtering components, further reducing the
solution size.
The MP2108 includes cycle-by-cycle current
limiting and under voltage lockout. Internal
power switches, combined with the tiny 10-pin
MSOP or 3mm x 3mm QFN packages, provide
a solution requiring a minimum of board space.
QFN package is recommended if output current
is higher than 1.5A.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV2108DQ/DK-00A 2.5”X x 2.0”Y x 0.5”Z
FEATURES
• 2A Output Current
• Synchronous Rectification
• Internal 160m and 190m Power Switches
• Input Range of 2.6V to 6V
• Over 95% Efficiency
• Under Voltage Lockout Protection
• Soft-Start Operation
• Thermal Shutdown
• Internal Current Limit (Source & Sink)
• Tiny 10-Pin MSOP and 3x3 QFN Packages
APPLICATIONS
• SOHO Routers, PCMCIA Cards, Mini PCI
• Handheld Computers, PDAs
• Cell phones, Digital Still and Video Cameras
• Small LCD Displays
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP2108
LX
VIN BST
1
3
7
459
8
6
10
2
FBCOMP
SS
PGNDSGNDVREF
RUN
OUTPUT
2.5V / 2A
INPUT
2.6V to 6V
OFF ON
10nF
10nF
2.2nF
10nF
100
90
80
70
60
50
40
30
20
10
0
EFFICIENCY (%)
0.01 0.1 1 10
LOAD CURRENT (A)
V
OUT
=2.5V
V
OUT
=1.2V
V
IN
=3.3V
