Monolithic Power Systems MP9403

Description

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.

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% 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

Note:Refer page no 7 for Inductor selection guide.

Typical applications

• Notebook Computers
• Pre-Regulator for Linear Regulators
• Distributed Power Systems

More information

• Datasheet
• IC product information