TM
MP1411
2A, 18V, 380KHz
Step-Down Converter
The Future of Analog IC Technology
TM
DESCRIPTION
The MP1411 is a monolithic step-down switch
mode converter with a built in internal power
MOSFET. It achieves 2A 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 23µA of
supply
current.
Programmable
soft-start
minimizes the inrush supply current and the
output overshoot at initial startup.
The MP1411 requires a minimum number of
readily available standard external components.
FEATURES
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2A Output Current
0.2Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 95% Efficiency
23µA Shutdown Mode
Fixed 380KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 18V Operating Input Range
Output Adjustable from 0.92V to 16V
Programmable Under Voltage Lockout
Available in an MSOP10 with Exposed Pad
Package
Distributed Power Systems
Battery Charger
DSL Modems
Pre-Regulator for Linear Regulators
APPLICATIONS
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“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V - 18V
4
2
BS
SW
C5
10nF
IN
EN
Efficiency vs
Output Current
95
90
EFFICIENCY (%)
OPEN = AUTOMATIC
STARTUP
9
10
5.0V
3.3V
2.5V
5
7
MP1411
SS
GND
6
FB
COMP
8
D1
B220A
V
OUT
3.3V/2A
85
80
75
70
65
60
0
0.5
1.0
1.5
C6
OPEN
C3
3.9nF
2.0
2.5
MP1411_TAC_S01
OUTPUT CURRENT (A)
MP1411_EC01
MP1411 Rev. 1.3
1/22/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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