MP2403 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 3A, 32V, 250kHz Integrated Synchronous Step-Down Converter

The Future of Analog IC Technology
MP2403
3A, 32V, 250kHz Integrated Synchronous
Step-Down Converter
DESCRIPTION
The MP2403 is a monolithic synchronous buck
regulator. The device integrates a 150mΩ
high-side MOSFET and an 80mΩ low-side
MOSFET that provides 3A continuous load
current over a wide operating input voltage of
4.6V to 32V. Current mode control provides fast
transient response and cycle-by-cycle current
limit.
An adjustable soft-start prevents inrush current
at turn-on. In shutdown mode, the supply
current drops to 1μA.
This device, available in an 8-pin SOIC
package, provides a very compact system
solution with minimal reliance on external
components.
EVALUATION BOARD REFERENCE
Board Number
EV2403DN-00A
Dimensions
2.0”X x 1.5”Y x 0.5”Z
FEATURES
• 3A Output Current
• Wide 4.6V to 32V Operating Input Range
• Integrated MOSFET Switches
• Output Adjustable from 0.80V to 28V
• Up to 95% Efficiency
• Programmable Soft-Start
• Stable with Low ESR Ceramic Output Capacitors
• Fixed 250kHz Frequency
• Cycle-by-Cycle Over Current Protection
• Input Under Voltage Lockout
• Thermally Enhanced 8-Pin SOIC Package
APPLICATIONS
• Distributed Power Systems
• Pre-Regulator for Linear Regulators
• Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.6V to 32V
OFF
2
ON
7
IN
EN
1
BS
SW
3
MP2403
8 _SS
FB ⁵
GND
COMP
4
6
OUTPUT
3.3V
3A
Efficiency vs
Output Current
100
90
V_IN=12V
80
70
V_IN=5V ^VIN=24V
60
50
V_IN=32V
40
30
20
10
V_OUT=3.3V
0
0
1
2
3
OUTPUT CURRENT(A)
MP2403 Rev.1.0
www.MonolithicPower.com
1
4/20/2010
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