MP1430 データシートの表示（PDF） - Monolithic Power Systems
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MP1430 Datasheet PDF : 11 Pages
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TM
The Future of Analog IC Technology TM
DESCRIPTION
The MP1430 is a step-down regulator with an
internal Power MOSFET. It achieves 3A
continuous output current over a wide input
supply range with excellent load and line
regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown. Adjustable
soft-start reduces the stress on the input source
at turn-on. In shutdown mode the regulator draws
20µA of supply current.
The MP1430 requires a minimum number of
readily available external components to
complete a 3A step down DC to DC converter
solution.
TYPICAL APPLICATION
INPUT
6V to 28V
OFF ON
C5
10nF
2
7
IN
EN
1
BS
SW
3
MP1430
8 SS
FB 5
GND
COMP
4
6
C3
C6
8.2nF
(optional)
D1
B340A
MP1430
3A, 28V, 385KHz
Step-Down Converter
FEATURES
• 3A Output Current
• Programmable Soft-Start
• 110mΩ Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 95% Efficiency
• 20µA Shutdown Mode
• Fixed 385KHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 6V to 28V Operating Input Range
• Output Adjustable from 1.22V
• Under Voltage Lockout
• Available in 8-Pin SOIC Package
APPLICATIONS
• Distributed Power Systems
• Battery Chargers
• Pre-Regulator for Linear Regulators
• Flat Panel TVs
• Set-Top Boxes
• Cigarette Lighter Powered Devices
• DVD/PVR Devices
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
OUTPUT
3.3V
3A
MP1430_TAC01
Efficiency vs
Load Current
100
95
VIN = 9V
90
85
VIN = 24V
80
VIN = 12V
75
70
65
60
55
50
0 500 1000 1500 2000 2500 3000 3500
LOAD CURRENT (mA)
MP1430_TAC _EC01
MP1430 Rev. 1.0
11/1/2005
www.MonolithicPower.com
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
Free Datasheet http://www.datasheet4u.com/
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