MP28373 Datasheet: Step-Down Converter





MP28373 Step-Down Converter Datasheet

Part Number MP28373
Description Step-Down Converter
Manufacture MPS
Total Page 11 Pages
PDF Download Download MP28373 Datasheet PDF

Features: The Future of Analog IC Technology DESC RIPTION The MP28373 is a 1.4MHz step-d own regulator with a built-in power MOS FET. It achieves 3A continuous output c urrent over a wide input supply range w ith excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabi lization. Fault condition protection i ncludes cycle-bycycle current limiting and thermal shutdown. Adjustable soft-s tart reduces the stress on the input so urce at turn-on. In shutdown mode, the regulator draws 20μA of supply current . The MP28373 is available in an 8-pin SOIC package with an exposed pad, and requires a minimum number of readily av ailable external components to complete a 3A step-down DC to DC converter solu tion. EVALUATION BOARD REFERENCE Boar d Number Dimensions EV28373DN-00A 2. 0” x 1.9” x 0.4” MP28373 3A, 28V , 1.4MHz Step-Down Converter FEATURES 3A Continuous Output Current, 4A Pea k Output Current  Programmable Soft-Start  100mΩ Internal Power MOSFET.

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The Future of Analog IC Technology
DESCRIPTION
The MP28373 is a 1.4MHz step-down regulator
with a built-in 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 MP28373 is available in an 8-pin SOIC
package with an exposed pad, and 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
Dimensions
EV28373DN-00A
2.0” x 1.9” x 0.4”
MP28373
3A, 28V, 1.4MHz
Step-Down Converter
FEATURES
3A Continuous Output Current, 4A Peak
Output Current
Programmable Soft-Start
100mInternal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 91% Efficiency
20μA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 28V Operating Input Range
Output is Adjustable From 0.92V to 21V
Under Voltage Lockout
APPLICATIONS
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
OPEN =
AUTOMATIC
STARTUP
C1
2 1 C5
7 IN
EN
BS 3
SW
8
SS
MP28373
FB 5
GND
COMP
4
C4
6 D1
C3
R3
L1 OUTPUT
3.3V
3A
R1
R2 C2
Efficiency Curve
100
VOUT=5V
90
80 VOUT=3.3V
70
60
0
VIN=12V
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MP28373 Rev. 1.01
www.MonolithicPower.com
2/18/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
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