MP1593
3A, 28V, 385kHz
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP1593 is a step-down regulator with an
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 MP1593 requires a minimum number of
readily
available
external
components,
providing a compact solution.
FEATURES
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 28V Operating Input Range
Output Adjustable from 1.22V
Under-Voltage Lockout
Available in 8-Pin SOIC Package
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
Flat Panel TVs
Set-Top Boxes
Cigarette Lighter Powered Devices
DVD/PVR Devices
APPLICATIONS
EVALUATION BOARD REFERENCE
Board Number
EV1593DN-00A
Dimensions
2.1”X x 1.3”Y x 0.4”Z
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 28V
2
IN
7
EN
8
1
BS
3
SW
C5
10nF
L1
10μ H
4A
R1
16.9kΩ
1%
D1
B340A
R2
10kΩ
1%
100
95
90
Efficiency vs
Load Current
V
IN
= 9V
V
IN
= 24V
V
IN
= 12V
EFFICIENCY (%)
OFF ON
MP1593
SS
GND
4
FB
COMP
6
OUTPUT
3.3V
3A
85
80
75
70
65
60
55
50
0
0.5
1.0
5
C1
10μ F/35V
CERAMIC
x2
C4
0.1μ F
C6
(optional)
C3
8.2nF
R3
5.6kΩ
C2
22μ F/6.3V
CERAMIC
x2
1.5
2.0
2.5
3.0
3.5
LOAD CURRENT (A)
MP1593 Rev. 2.11
1/10/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
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