MP1472
2A, 18V Synchronous Rectified
Step-Down Converter
MP1472 Rev. 1.0 www.MonolithicPower.com 1
9/2/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP1472 is a monolithic synchronous buck
regulator. The device integrates a 175m high-
side MOSFET and a 115m low-side MOSFET
that provide 2A of continuous load current over
a wide input voltage of 4.75V to 18V. Current
mode control provides fast transient response
and cycle-by-cycle current limit.
An adjustable soft-start prevents inrush current
at turn-on, and in shutdown mode the supply
current drops to 1µA.
This device, available in an 8-pin TSOT23-8
package, provides a very compact solution with
minimal external components.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV1472GJ-00A 2.5”X x 2.5”Y x 0.5”Z
FEATURES
2A Output Current
Wide 4.75V to 18V Operating Input Range
Integrated Power MOSFET Switches
Output Adjustable from 0.923V to 15V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output
Capacitors
Fixed 340kHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
8–Pin TSOT23-8
APPLICATIONS
Distributed Power Systems
Networking Systems
FPGA, DSP, ASIC Power Supplies
Green Electronics/ Appliances
Notebook Computers
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks o
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
LOAD CURRENT (A)
EFFICIENCY (%)
Efficiency vs. Load Current
V
OUT
=3.3V
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10
V
IN
=4.75V
V
IN
=12V
V
IN
=18V
