MP2120 Datasheet, PDF (1/11 Pages) Monolithic Power Systems – 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.
TYPICAL APPLICATION
V_IN
POK
OFF ON
IN
POK
BS
SW
MP2120
EN/SYNC
FB
GND
C3
10nF _1.2
MP2120
2.5A, 5.5V Synchronous
Step-Down Switching Regulator
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
APPLICATIONS
 µP/ASIC/DSP/FPGA Core and I/O Supplies
 Printers and LCD TVs
 Network and Telecom Equipment
 Point of Load Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
V_OUT
1.8V / 2.5A
Efficiency vs.
Output Current
95
90
85
5V to 1.8V 5V to 3.3V
5V to 2.5V
80
75
70
0 0.5 1 1.5 2 2.5
OUTPUT CURRENT (A)
MP2120 Rev. 0.92
www.MonolithicPower.com
1
9/7/2011
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