MP1482
2A, 18V Synchronous Rectified
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP1482 is a monolithic synchronous buck
regulator. The device integrates two 130mΩ
MOSFETs, and provides 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 SOIC
package, provides a very compact solution with
minimal external components.
FEATURES
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2A Output Current
Wide 4.75V to 18V Operating Input Range
Integrated 130mΩ Power MOSFET Switches
Output Adjustable from 0.923V to 15V
Up to 93% 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 SOIC
Distributed Power Systems
Networking Systems
FPGA, DSP, ASIC Power Supplies
Green Electronics/ Appliances
Notebook Computers
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
Efficiency vs
Load Current
100
95
2
7
IN
EN
1
BS
3
SW
V
OUT
= 3.3V
V
OUT
= 2.5V
90
EFFICIENCY (%)
85
80
75
70
65
60
55
50
0
MP1482
8
SS
GND
4
FB
COMP
6
5
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
2.5
MP1482 Rev. 1.3
9/21/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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