MP2492 Datasheet, PDF (1/11 Pages) Monolithic Power Systems – 2A, 55V, 100kHz Step-Down Converter with Programmable Output Current Limit

The Future of Analog IC Technology
MP2492
2A, 55V, 100kHz Step-Down Converter
with Programmable Output Current Limit
DESCRIPTION
The MP2492 is a monolithic step-down switch
mode converter with a programmable output
current limit. It achieves 2A continuous output
current over a wide input supply range with
excellent load and line regulation.
The maximum output current can be
programmed by sensing current through the
inductor DC resistance (DCR) or an accurate
sense resistor.
MP2492 achieves low EMI signature with well
controlled switching edges.
Fault condition protection includes cycle-by-cycle
current limiting, and thermal shutdown.
The MP2492 requires a minimum number of
readily available standard external components.
The MP2492 is available in QFN10 (3mm x 3mm)
and SOIC8E packages.
FEATURES
• Wide 4.5V to 55V Operating Input Range
• Programmable up to 2A Output Current
• Output Adjustable from 0.8V to 15V
• Programmable Output Current Limit without
power loss
• 0.25Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Fixed 100kHz Frequency
• Low EMI signature
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Available in QFN10 and SOIC8E Packages
APPLICATIONS
• USB Power Supplies
• Automotive Cigarette Lighter Adapters
• Power Supply for Linear Chargers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Efficiency
V_IN =12V , V_OUT =5V
100
90
80
70
60
50
40
30
20
0.0 0.4 0.8 1.2 1.6 2.0
I_OUT (A)
MP2492 Rev. 1.0
www.MonolithicPower.com
1
12/20/2010
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