MP2149
6V, 1A, Low Quiescent Current
Dual, SYNC Buck Regulator
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP2149 is an internally-compensated,
1MHz fixed-frequency, dual PWM, synchronous,
step-down regulator. The MP2149 operates
from a 2.7V-to-6V input, generates an output
voltage as low as 0.608V, and has a 45µA
quiescent current that makes it ideal for
powering portable equipment that runs on a
single cell lithium-ion (Li+) battery.
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Dual 1A-Output Current
>93% Peak Efficiency
>80% Light-Load Efficiency
Wide 2.7V-to-6V Operating Input Range
100mΩ and 40mΩ Internal Power MOSFET
1MHz Fixed Switching Frequency
Adjustable Output from 0.608V to VIN
180° Phase-Shifted Operation
100% Duty-Cycle Operation
The MP2149 integrates dual 100mΩ high-side
switches and 40mΩ synchronous rectifiers for
high efficiency without an external Schottky
diode. Peak-current mode control and internal
compensation limits the minimum number of
readily-available external components.
45µA Quiescent Current
Cycle-by-Cycle Over-Current Protection
Short-Circuit Protection with Hiccup Mode
Thermal Shutdown
Available in an 8-pin TSOT23-8 Package
Fault-condition protections include cycle-by-cycle
current limiting and thermal shutdown.
APPLICATIONS
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Small/Handhold Devices
DVD Drivers
Portable Instruments
Smartphones and Feature Phones
Battery-Powered Devices
The MP2149 is available in an 8-pin TSOT23-8
package.
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
VIN
5V
100
90
C
22µF
IN
IN
80
EN1
EN2
EN1
EN2
L2
L1
1.5uH
70
VOUT1
1.8V
1.5uH
VOUT2
1.2V
SW1
SW2
60
MP2149
GND
COUT 2
22µF
COUT1
22µF
R1
806kO
R3
806kO
50
FB1
FB2
40
30
R2
412kO
R4
825kO
0.01
0.1
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MP2149 Rev.1.01
5/31/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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