MP1567DQ-LF-Z Datasheet, PDF (1/11 Pages) MPS Industries, Inc. – 1.2A Synchronous Rectified Step-Down Converter

The Future of Analog IC Technology
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.
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
MP1567
1.2A Synchronous Rectified
Step-Down Converter
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
APPLICATIONS
• SOHO Routers, PCMCIA Cards, Mini PCI
• Handheld Computers, PDAs
• Cell Phones
• Digital Video Cameras
• Small LCD Displays
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
2.6V to 6V
10nF
OFF ON
OPEN IF
NOT USED
2
1
IN
10
EN
BS
SW ³
MP1567
7
FB
6 _SS
BP ⁹
SGND PGND COMP
5
4
8
10nF
1nF
10nF
V_OUT
1.8V/1.2A
MP1567_TAC_S01
Efficiency vs
Load Current
100
90 V_IN=3.3V
80
70
60
V_IN=4V
50
40
V_IN=5V
30
20
10
V_OUT=1.8V
0
10
100
1000
LOAD CURRENT (mA)
MP1567_EC01
MP1567 Rev. 2.4
www.MonolithicPower.com
1
9/21/2007
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© 2007 MPS. All Rights Reserved.