MP2119 Datasheet, PDF (1/12 Pages) Monolithic Power Systems – 2A, 6V Synchronous Step-Down Switching Regulator

The Future of Analog IC Technology
MP2119
2A, 6V Synchronous
Step-Down Switching Regulator
DESCRIPTION
The MP2119 is an internally compensated
1.5MHz fixed frequency PWM synchronous
step-down regulator. MP2119 operates from a
2.7V to 6V input and generates an output
voltage as low as 0.8V.
The MP2119 integrates a 100mΩ high-side
switch and a 100mΩ synchronous rectifier for
high efficiency without an external Schottky
diode. With peak current mode control and
internal compensation, the MP2119 based
solution delivers a very compact footprint with a
minimum component count.
The MP2119 is available in a small 3mm x 3mm
QFN package.
FEATURES
• 2A Output Current
• Input Operation Range: 2.7V to 6V
• All Ceramic Capacitor Design
• 1.5MHz Fixed Switching Frequency
• Adjustable Output from 0.8V to 0.9xV_IN
• Internal Soft-Start
• Frequency Synchronization Input
• Power Good Output
• Thermal Shutdown
• Cycle-by-Cycle Current Limiting
• Hiccup Short Circuit Protection
• 3mm x 3mm 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.
TYPICAL APPLICATION
V_IN
2.7V to 6V
47
POK
OFF ON
IN
POK
BS
SW
MP2119
EN/SYNC
FB
GND
C3
100nF
1.2
400
310
V_OUT
1.8V / 2A
47
Efficiency vs.
Output Current
100
80
V_IN = 5V, V_OUT =1.8V
V_IN = 3.3V, V_OUT =1.8V
60
40
20
0
0
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
MP2119 Rev. 0.94
www.MonolithicPower.com
1
4/22/2011
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.