MP1484 데이터 시트보기 (PDF) - Monolithic Power Systems
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MP1484 Datasheet PDF : 11 Pages
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MP1484
3A, 18V, 340KHz Synchronous Rectified
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP1484 is a monolithic synchronous buck
regulator. The device integrates top and bottom
85mΩ MOSFETS that provide 3A of continuous
load current over a wide operating 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 below 1µA.
The MP1484 is PIN compatible to the MP1482
2A/18V/Synchronous Step-Down Converter.
FEATURES
• 3A Continuous Output Current
• Wide 4.75V to 18V Operating Input Range
• Integrated 85mΩ Power MOSFET Switches
• Output Adjustable from 0.925V to 20V
• 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
• Thermally Enhanced 8-Pin SOIC Package
APPLICATIONS
• FPGA, ASIC, DSP Power Supplies
• LCD TV
• Green Electronics/Appliances
• Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
2
7
IN
EN
8
SS
GND
4
1
BS 3
SW
5
FB
COMP
6
Efficiency vs
Load Current
100
95
90 VIN = 12V
VIN = 5V
85
80
75
70
65
60
55
50
0.1
1.0
10
LOAD CURRENT (A)
MP1484 Rev. 0.9
www.MonolithicPower.com
1
10/23/2008
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
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