MP2249
1MHz, 6V, 3A, Low-Voltage
Synchronous Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP2249 is a 1MHz constant frequency,
current mode, PWM step-down converter. The
device integrates a main switch and a
synchronous rectifier for high efficiency and
eliminates the need for an external Schottky
diode. It is ideal for powering portable
equipment that runs from a single cell Lithium-
Ion (Li+) battery.
The MP2249 can supply 3A of load current from
a 2.5V to 6V input voltage. It can run at 100%
duty cycle for low dropout applications. The
MP2249 provides internal soft-start control to
reduce rush current and output discharge
function to control discharging of the output
capacitor.
The MP2249 is available in small 3mmx3mm
TQFN10 or SOIC8E package.
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FEATURES
High Efficiency: Up to 90%
Power Save Mode at Light Load
1MHz Constant Switching Frequency
Up to 4.5A Peak Current
2.5V to 6V Input Voltage Range
Output Adjustable from 0.6V to VIN
100% Duty Cycle in Dropout
Output Discharge Function
Internal Soft-Start Control
Power Good Indicator
Short Circuit Protection
Thermal Fault Protection
Available in 3mmx3mm TQFN10 or SOIC8E
Package
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
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APPLICATIONS
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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
R3
V
IN
/ 5V
PVIN
PG
PG
L1
2.2 H
V
OUT
/1.8V
R1
MP2249
PVIN
SW
C1
10
C2
10
ON OFF
EN
GND
FB
C3
22
R2
C4
MP2249 Rev.1.0
11/2/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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