Product Descriptions

The MP9403 is a monolithic synchronous buck regulator. The device integrates a 150mΩ high-side MOSFET and a 100mΩ low-side MOSFET that provides 3A continuous load current over input voltage of 4.3V to 7V. Current mode control provides fast transient response and cycle-by-cycle current limit.

An adjustable soft-start prevents inrush current at turn-on. In shutdown mode, the supply current drops to 1μA.

This device, available in an 8-pin SOIC package with exposed pad, provides a very compact system solution with minimal reliance on external components.

Product Features

• 3A Output Current

• 4.3V to 7V Operating Input Range

• Integrated MOSFET Switches

• Output Adjustable from 0.80V to 5.50V

• Up to 93 percent Efficiency

• Programmable Soft-Start

• Stable with Low ESR Ceramic Output Capacitors

• Fixed 250kHz Frequency

• Cycle-by-Cycle Over Current Protection

• Input Under Voltage Lockout

• Thermally Enhanced 8-Pin SOIC Package

Product Applications

• Distributed Power Systems

• Pre-Regulator for Linear Regulators

• Notebook Computers

Product Photos

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