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MP1593 Datasheet, PDF (1/11 Pages) Monolithic Power Systems – 3A, 28V, 385KHz Step-Down Converter | |||
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TM
The Future of Analog IC Technology TM
MP1593
3A, 28V, 385KHz
Step-Down Converter
DESCRIPTION
The MP1593 is a step-down regulator with an
internal Power MOSFET. It achieves 3A
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. Adjustable
soft-start reduces the stress on the input source
at turn-on. In shutdown mode the regulator draws
20µA of supply current.
The MP1593 requires a minimum number of
readily available external components to
complete a 3A step down DC to DC converter
solution.
EVALUATION BOARD REFERENCE
Board Number
EV1593DN-00A
Dimensions
2.1âX x 1.3âY x 0.4âZ
FEATURES
⢠3A Output Current
⢠Programmable Soft-Start
⢠100m⦠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
âMPSâ and âThe Future of Analog IC Technologyâ are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 28V
OFF ON
C5
10nF
2
7
IN
EN
1
BS
SW
3
MP1593
8 SS
FB 5
GND
COMP
4
6
C3
C6
8.2nF
(optional)
D1
B340A
OUTPUT
3.3V
3A
MP1593_TAC01
Efficiency vs
Load Current
100
95
VIN = 9V
90
85
VIN = 24V
80
VIN = 12V
75
70
65
60
55
50
0 500 1000 1500 2000 2500 3000 3500
LOAD CURRENT (mA)
MP1593_TAC _EC01
MP1593 Rev. 1.8
www.MonolithicPower.com
1
1/6/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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