MP28114 Datasheet | Synchronous Step-Down Converter





MP28114 PDF File (Datasheet) Download

Part Number MP28114
Description Synchronous Step-Down Converter
Manufacture MPS
Total Page 11 Pages
PDF Download Download MP28114 PDF File

Features: The Future of Analog IC Technology MP28 114 Ultra-small 1.7MHz, 600mA, Low-Volt age Synchronous Step-Down Converter DE SCRIPTION The MP28114 is a 1.7MHz const ant frequency, current mode, ultra-smal l PWM step-down converter. The device i ntegrates a main switch and a synchrono us rectifier for high efficiency and el iminates the needs for an external scho ttky diode. It is ideal for powering po rtable equipment that runs from a singl e cell LithiumIon (Li+) battery. The MP 28114 can supply 600mA of load current from a 2.5V to 6V input voltage. The ou tput voltage for the MP28114DG can be r egulated as low as 0.6V, while the outp ut voltages of the MP28114DG-1.5, MP281 14G-1.8, and MP28114DG-3.3 are fixed at 1.5V, 1.8V, and 3.3V, respectively. Th e MP28114 can also run at 100% duty cyc le for low dropout applications. The MP 28114 is available in an ultra-small 2x 2mm QFN package. ORDERING INFORMATION Part Number MP28114DG - 1.5 MP28114DG - 1.8 MP28114DG - 3.3 MP28114DG Output Voltage VOUT = 1.5V VOU.

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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
VOUT = 1.5V
VOUT = 1.8V
VOUT = 3.3V
VOUT =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
FB 5
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
8/5/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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