MP28114 Datasheet, PDF (1/11 Pages) Monolithic Power Systems – Ultra-small 1.7MHz, 600mA, Low-Voltage Synchronous Step-Down Converter

The Future of Analog IC Technology
MP28114
Ultra-small
1.7MHz, 600mA, Low-Voltage
Synchronous Step-Down Converter
DESCRIPTION
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.
ORDERING INFORMATION
Part Number
MP28114DG - 1.5
MP28114DG - 1.8
MP28114DG - 3.3
MP28114DG
Output Voltage
V_OUT = 1.5V
V_OUT = 1.8V
V_OUT = 3.3V
V_OUT =0.6 to 6V
FEATURES
• 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
• Cellular and Smart Phones
• Microprocessors and DSP Core Supplies
• PDAs
• MP3 Players
• Digital Still and Video Cameras
• Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
2.5V - 6V
C1
7
IN
SW ¹
L1
OUTPUT
MP28114
4
EN
GND
5
FB
6,8
R1
C2
R2
Efficiency vs
Load Current
100
90
80
70
60
50
40
30
20
10
0
10
100
LOAD CURRENT (mA)
1000
MP28114 Rev.0.92
www.MonolithicPower.com
1
8/5/2010
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