DESCRIPTION
The MP1423 is a step-down regulator with a
built in internal 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 MP1423 requires a minimum number of
readily available external components to
complete a 3A step-down DC to DC converter solution.

FEATURES
• 3A Output Current
• Programmable Soft-Start
• 110mΩ Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic Capacitors
• Up to 94% Efficiency
• 20μA Shutdown Mode
• Fixed 385KHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 6V to 23V Operating Input Range
• Output is Adjustable From 1.22V to 21V
• Under Voltage Lockout

APPLICATIONS
• Distributed Power Systems
• Battery Chargers
• Pre-Regulator for Linear Regulators