MP2451 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 36V, 2MHz, 0.6A Step-Down Converter

MP2451
36V, 2MHz, 0.6A
Step-Down Converter
DESCRIPTION
The MP2451 is a high frequency (2MHz) step-
down switching regulator with integrated
internal high-side high voltage power MOSFET.
It provides single 0.6A (or less) highly efficient
output with current mode control for fast loop
response.
The wide 3.3V to 36V input range
accommodates a variety of step-down
applications in automotive input environment. A
3μA shutdown mode quiescent current allows
use in battery-powered applications.
High power conversion efficiency over a wide
load range is achieved by scaling down the
switching frequency at light load condition to
reduce the switching and gate driving losses.
Frequency fold-back helps prevent inductor
current runaway during start-up. Thermal
shutdown provides reliable, fault-tolerant
operation.
The MP2451 is available in the cost-effective
SOT23-6L package.
TYPICAL APPLICATION
FEATURES
 230μA Operating Quiescent Current
 Wide 3.3V to 36V Operating Input Range
 500mΩ Internal Power MOSFET
 2MHz fixed Switching Frequency
 Internally compensated
 Stable with Ceramic Output Capacitors
 Internal Soft-Start
 Precision Current Limit Without Current
Sensing Resistor
 > 90% Efficiency
 Output Adjustable from +0.8V to 0.8xV_IN
 3μA Low Shutdown Supply Current
 6-Lead SOT23 Package
APPLICATIONS
 High Voltage Power Conversion
 Automotive Systems
 Industrial Power Systems
 Distributed Power Systems
 Battery Powered Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
MP2451 Rev. 1.31
www.MonolithicPower.com
4/23/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
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