DESCRIPTION
The MP2451 is a high frequency (2MHz) stepdown
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
SOT23-6 and TSOT23-6 packages.

FEATURES
 130μA 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 0.8xVIN
 3μA Low Shutdown Supply Current
 SOT23-6 and TSOT23-6 Packages
APPLICATIONS
 High Voltage Power Conversion
 Automotive Systems
 Industrial Power Systems
 Distributed Power Systems
 Battery Powered Systems