MP2012 Datasheet, PDF (1/10 Pages) Monolithic Power Systems – Low Voltage, 2.7-6V Input,1.5A, 1.2MHz Synchronous Step-Down Converter

The Future of Analog IC Technology
MP2012
Low Voltage, 2.7-6V Input,1.5A, 1.2MHz
Synchronous Step-Down Converter
DESCRIPTION
The MP2012 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 MP2012 can provide up to
1.5A 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
MP2012 is stable with ceramic capacitors and
small inductors. Fault condition protection
includes cycle-by-cycle current limiting and
thermal shutdown.
MP2012 is available in a small QFN6 (3x3mm)
package.
FEATURES
• 2.7-6V Input Operation Range
• Output Adjustable from 0.8V to VIN
• 1μA Max Shutdown Current.
• Up to 95% Efficiency
• 100% Duty Cycle for Low Dropout
Applications
• 1.2MHz Fixed Switching Frequency
• Stable with Low ESR Output Ceramic
Capacitors
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Short Circuit Protection
• Available in QFN6 (3x3mm)
APPLICATIONS
• DVD+/-RW Drives
• Smart Phones
• PDAs
• Digital Cameras
• Portable Instruments
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“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V_IN
2.7V to 6V
4
PVIN
6
EN
5
3
VIN MP2012 SW
C1
2
GND
FB 1
EN
L1
R1
Rt
R2
V_OUT
1.8V/1.5A
C2
Efficiency vs.
Load Current
100
90
80
70 ^Vin=5V
60
Vin=3V
50
40
30
20
10
0
0 0.3 0.6 0.9 1.2 1.5
LOAD CURRENT(A)
MP2012 Rev. 1.01
www.MonolithicPower.com
1
9/22/2011
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© 2011 MPS. All Rights Reserved.