DESCRIPTION

The CX8509 is a monolithic synchronous buck

regulator. The device integrates 100mΩ

MOSFETS that provide 2A continuous load current over a wide operating input voltage of

4.75V to 25V. 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 below 1 μA.

This device, available in an 8-pin SOIC package, provides a very compact system solution

with minimal reliance on external components.

FEATURES

z 2A Output Current

z Wide 4.75V to 25V Operating Input Range

z Integrated 100mΩ Power MOSFET Switches

z Output Adjustable from 0.925V to 20V

z Up to 95% Efficiency

z Programmable Soft-Start

z Stable with Low ESR Ceramic Output Capacitors

z Fixed 400KHz Frequency

z Cycle-by-Cycle Over Current Protection

z Input Under Voltage Lockout

z Thermally Enhanced 8-Pin SOIC Package

APPLICATIONS

z Distributed Power Systems

z Networking Systems

z Set-top Box

z LCD TV/Monitor

z Notebook or Mini-Book