MP28114
Ultra-small
1.7MHz, 600mA, Low-Voltage
Synchronous Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP28114 is a 1.7MHz constant frequency,
current mode, ultra-small PWM step-down
converter. The device integrates a main switch
and a synchronous rectifier for high efficiency
and eliminates the needs for an external
schottky diode. It is ideal for powering portable
equipment that runs from a single cell Lithium-
Ion (Li+) battery. The MP28114 can supply
600mA of load current from a 2.5V to 6V input
voltage. The output voltage for the MP28114DG
can be regulated as low as 0.6V, while the
output voltages of the MP28114DG-1.5,
MP28114G-1.8, and MP28114DG-3.3 are fixed
at 1.5V, 1.8V, and 3.3V, respectively. The
MP28114 can also run at 100% duty cycle for
low dropout applications. The MP28114 is
available in an ultra-small 2x2mm QFN package.
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High Efficiency: Up to 95%
1.7MHz Constant Switching Frequency
600mA Available Load Current
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Current Mode Control
Short Circuit Protection
Thermal Fault Protection
<0.1µA Shutdown Current
1.5V,1.8V, and 3.3V Fixed Out-put Versions
Ultra-Small 2x2mm QFN Package
APPLICATIONS
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Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
ORDERING INFORMATION
Part Number
MP28114DG - 1.5
MP28114DG - 1.8
MP28114DG - 3.3
MP28114DG
Output Voltage
VOUT = 1.5V
VOUT = 1.8V
VOUT = 3.3V
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
VOUT =0.6 to 6V
TYPICAL APPLICATION
Efficiency vs
Load Current
INPUT
2.5V - 6V
100
OUTPUT
L1
7
90
1
5
IN
SW
FB
80
70
60
MP28114
R1
R2
C1
4
EN
GND
C2
50
40
30
20
10
0
6,8
10
100
1000
LOAD CURRENT (mA)
MP28114 Rev.0.92
8/5/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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