TM
MP1567
1.2A Synchronous Rectified
Step-Down Converter
The Future of Analog IC Technology
TM
DESCRIPTION
The MP1567 is a 1.2A, 800KHz DC to DC
converter designed for low voltage applications
requiring high efficiency. Capable of providing
output voltages as low as 0.9V from a 3.3V
supply voltage, the MP1567 eliminates the
need for a 5V rail, providing over 90% efficiency
via synchronous rectification and eliminating
heat issues in confined spaces. Soft-start
operation protects internal circuitry from hard
turn on issues. Switching at 800KHz reduces
the size of external components and thereby
reduces board space.
The MP1567 includes cycle-by-cycle current
limiting and under voltage lockout. Internal
power switches combined with the tiny 10-pin
MSOP or QFN packages provide a solution
requiring a minimum of space.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1.2A Output Current
Synchronous Rectified
Internal 180mΩ and 220mΩ Power Switches
V
IN
Range of 2.6V to 6V
Over 90% Efficiency
Zero Current Shutdown Mode
Under Voltage Lockout Protection
Soft-Start Operation
Thermal Shutdown
Internal Current Limit (Source & Sink)
Tiny 10-Pin MSOP or QFN Packages
Evaluation Boards Available
SOHO Routers, PCMCIA Cards, Mini PCI
Handheld Computers, PDAs
Cell Phones
Digital Video Cameras
Small LCD Displays
APPLICATIONS
EVALUATION BOARD REFERENCE
Board Number
EV0033 (MP1567DK)
EV0059 (MP1567DK)
EV0060 (MP1567DQ)
Dimensions
2.5”X x 2.0”Y x 0.7”Z
2.5”X x 2.0”Y x 0.4”Z
2.5”X x 2.0”Y x 0.4”Z
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
2.6V to 6V
2
1
IN
EN
BS
SW
3
7
9
10nF
Efficiency vs
Load Current
100
90
EFFICIENCY (%)
V
OUT
1.8V/1.2A
V
IN
=3.3V
OFF ON
OPEN IF
NOT USED
10
6
80
70
60
50
40
30
20
10
0
10
V
OUT
=1.8V
100
LOAD CURRENT (mA)
1000
V
IN
=5V
V
IN
=4V
MP1567
SS
5
4
FB
BP
8
SGND PGND COMP
10nF
10nF
1nF
MP1567_TAC_S01
MP1567_EC01
MP1567 Rev. 2.3
1/3/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
1
MPS [ MONOLITHIC POWER SYSTEMS ]
