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