MP1583
3A, 23V, 385KHz
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP1583 is a step-down regulator with a
built-in internal Power MOSFET. It achieves 3A
of 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. An adjustable soft-start reduces the
stress on the input source at startup. In
shutdown mode the regulator draws 20μA of
supply current.
The MP1583 requires a minimum number of
external components, providing a compact
solution.
FEATURES
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3A Output Current
Programmable Soft-Start
100mΩ 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 4.75V to 23V Operating Input Range
Output Adjustable from 1.22V to 21V
Under-Voltage Lockout
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 23V
OPEN =
AUTOMATIC
STARTUP
10μ F
CERAMIC
7
Efficiency Curve
2
IN
EN
1
BS
SW
3
10nF
15μ H
10.5kΩ
OUTPUT
2.5V
3A
100
90
EFFICIENCY (%)
V
IN
= 10V
V
OUT
=5.0V
8
MP1583
SS
GND
4
FB
COMP
6
5
80
70
60
50
V
OUT
=2.5V
V
OUT
=3.3V
B330A
5.6nF
10kΩ
22μ F
CERAMIC
10nF
3.9kΩ
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
MP1583_EC01
MP1583 Rev. 3.1
6/20/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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