MP9141ES-LF-Z データシートの表示（PDF） - Monolithic Power Systems
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MP9141ES-LF-Z Datasheet PDF : 10 Pages
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MP9141
1.8A Step-Down
DC to DC Converter
The Future of Analog IC Technology
MPS CONFIDENTIAL AND PROPRIETARY INFORMATION– INTERNAL USE ONLY
DESCRIPTION
The MP9141 is a monolithic step-down switch
mode regulator with a built in internal power
MOSFET. It achieves 1.8A 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. In shutdown mode the regulator
draws 25μA of supply current.
The MP9141 requires a minimum number of
readily available standard external components.
FEATURES
• 1.8A Output Current
• 0.25Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 92% Efficiency
• 25µA Shutdown Mode
• Fixed 380KHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.75V to 20V Operating Input Range
• Output Adjustable from 1.22V to 12V
• Programmable Under Voltage Lockout
• Available in an 8-Pin SOIC Package
APPLICATIONS
• PC Monitors
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 20V
+
OFF ON
C3
2
1 10nF
IN
BS
3
SW
MP9141
D1
B230
7
EN
5
FB
GND
4
COMP
6
C4
OPEN
C5
39nF
Efficiency vs
IOUT and VOUT
95
OUTPUT
3.3V, 1.8A
90
85
5.0V
3.3V
2.5V
80
+
75
MP9141_TAC_S01
70
0
VIN = 10V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
MP1410_TAC_EC01
MP9141 Rev. 1.11
www.MonolithicPower.com
1
4/18/2011
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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