MP1593DN-LF-Z Datasheet, PDF (1/13 Pages) MPS Industries, Inc. – 3A, 28V, 385kHz Step-Down Converter

The Future of Analog IC Technology
MP1593
3A, 28V, 385kHz
Step-Down Converter
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.
EVALUATION BOARD REFERENCE
Board Number
EV1593DN-00A
Dimensions
2.1”X x 1.3”Y x 0.4”Z
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
APPLICATIONS
 Distributed Power Systems
 Battery Chargers
 Pre-Regulator for Linear Regulators
 Flat Panel TVs
 Set-Top Boxes
 Cigarette Lighter Powered Devices
 DVD/PVR Devices
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
OFF ON
C1
10μ F/35V
CERAMIC
x2
C5
10nF
2
7
IN
EN
1
BS
SW
3
MP1593
8 _SS
FB ⁵
GND
COMP
4
C4
0.1μ F
C6
(optional)
6
C3
8.2nF
R3
5.6kΩ
D1
B340A
L1
10μ H
4A
R1
16.9kΩ
1%
R2
10kΩ
1%
OUTPUT
3.3V
3A
C2
22μ F/6.3V
CERAMIC
x2
Efficiency vs
Load Current
100
95
V_IN = 9V
90
85
V_IN = 24V
80
75
V_IN = 12V
70
65
60
55
50
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
MP1593 Rev. 2.11
www.MonolithicPower.com
1
1/10/2013
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© 2013 MPS. All Rights Reserved.