MP2115
2A Synchronous Step-Down Converter
with Programmable Input Current Limit
The Future of Analog IC Technology
DESCRIPTION
The MP2115 is a high frequency, current mode,
PWM step-down converter with integrated input
current limit switch. The step-down converter
integrates a main switch and a synchronous
rectifier for high efficiency without an external
Schottky diode. The input average current limit
can be externally programmed. It is ideal for
powering portable equipment that is powered
by an USB port. The MP2115 can supply 2A of
load current from a 2.8V to 6V input voltage.
The output voltage can be regulated as low as
0.6V.
The MP2115 is available in a space-saving
10-pin QFN package.
FEATURES
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High Efficiency: Up to 92%
Programmable Switching Frequency from
0.7MHz-2MHz
Programmable Input Current Limit
2A Available Load Current
2.8V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
Current Mode Control
Power Good Indicator
Short Circuit Protection
Thermal Fault Protection
<0.1µA Shutdown Current
Space Saving 3mm x 3mm QFN10 Package
USB Powered Devices
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
APPLICATIONS
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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
USB Input
R4
100k
R3
100k
U1
PG
EN
Efficiency
100
90
V
IN
=5.0V
V
OUT
=3.8V, Freq=1.5MHz
1
VSYS
8
10
PG
EN
SW
FB
7
3
R1
51k
3.8V/2A
C5
220pF
VOUT
EFFICIENCY (%)
VIN
VSYS
9
V
IN
=5.5V
MP2115DQ
6 PGND
FREG
2 ILIM
80
70
60
50
0.0
4 AGND
6TPE470MI x 3
5
R6
86.6k
R5
24.9k
R2
9.53k
0.1
0.2
0.3
0.4
0.5
0.6
LOAD CURRENT ( A )
MP2115 Rev. 1.0
2/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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