MP2120
2.5A, 5.5V Synchronous
Step-Down Switching Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP2120 is an internally compensated
1.5MHz fixed frequency PWM synchronous
step-down regulator. MP2120 operates from a
2.7V to 5.5V input and generates an output
voltage as low as 0.8V.
The MP2120 integrates an 80mΩ high-side
switch and a 60mΩ synchronous rectifier for
high efficiency without an external Schottky
diode. With peak current mode control and
internal compensation, the MP2120 based
solution delivers a very compact footprint with a
minimum component count.
The MP2120 is available in a small 3mm x 3mm
10-lead QFN package.
FEATURES
2.5A Output Current
Input Operation Range: 2.7V to 5.5V
All Ceramic Capacitor Design
Up to 95% Efficiency
1.5MHz Fixed Switching Frequency
Adjustable Output from 0.8V to 0.9xV
IN
Internal Soft-Start
Frequency Synchronization Input
Power Good Output
Cycle-by-Cycle Current Limiting
Hiccup Short Circuit Protection
Thermal Shutdown
3mm x 3mm 10-lead QFN Package
µP/ASIC/DSP/FPGA Core and I/O Supplies
Printers and LCD TVs
Network and Telecom Equipment
Point of Load Regulators
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V
IN
IN
BS
SW
Efficiency vs.
Output Current
95
C3
10nF
POK
POK
MP2120
OFF ON
EN/SYNC
GND
FB
V
OUT
1.8V / 2.5A
EFFICIENCY (%)
1.2
90
85
80
75
70
0
0.5
1
1.5
2
2.5
OUTPUT CURRENT (A)
5V to 1.8V 5V to 3.3V
5V to 2.5V
MP2120 Rev. 0.92
9/7/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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