MP2127
2.7-6V Input, 2A, 1.2MHz
Synchronous Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP2127 is a fully integrated, internally
compensated 1.2MHz fixed frequency PWM
step-down converter. It is ideal for powering
portable equipment that runs from a single cell
Lithium-Ion (Li+) Battery, with an input range
from 2.7V to 6V. The MP2127 can provide up to
2A of load current with output voltage as low as
0.8V. It can also operate at 100% duty cycle for
low dropout applications. With peak current
mode control and internal compensation, the
MP2127 is stable with ceramic capacitors and
small inductors. Fault condition protection
includes cycle-by-cycle current limiting and
thermal shutdown.
MP2127 is available in
3mmx3mm QFN package.
the
small
6-pin
FEATURES
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Output Adjustable from 0.8V to VIN
Up to 95% Efficiency
100% Duty Cycle for Low Dropout
Applications
Power Good Indicator Output
1.2MHz Fixed Switching Frequency
Stable with Low ESR Output Ceramic
Capacitors
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Short circuit protection
2.7V-6V Input Operation Range
Available in 6-pin 3x3mm QFN
Smart Phones, PDA’s
DVD+/-RW Drives
Digital Cameras
Portable Instruments
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
R3
100k
6V
4
PVIN
PGOOD
6
L1
3.3
FB 1
R1
20k
C1
33
PGOOD
V
OUT
1.2V/2A
Efficiency vs.
Load Current
100
90
VIN=3V
VIN=5V
80
70
60
50
40
30
20
10
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
V
IN
2.7V
5
C1
10
VIN
MP2127
SW
3
2
GND
R2
40k
EFFICIENCY (%)
LOAD CURRENT(A)
MP2127 Rev. 0.91
www.MonolithicPower.com
1
4/27/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
MPS [ MONOLITHIC POWER SYSTEMS ]
