CXW8508

DESCRIPTION The CX8508 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 Capaci- tors z Fixed 340KHz 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 PACKAGE REFERENCE Part number CX8508 Package SOP8 Temperature –20° C to +85° C ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage (VIN) .......................-0.3V to 26V Switch Voltage (VSW) ...................–1V to VIN + 0.3V Bootstrap Voltage (VBS) .. .Vsw-0.3V to VSW + 6V Enable/UVLO Voltage (VEN) ............–0.3V to +6V Comp Voltage (VCOMP) .....................–0.3V to +6V Feedback Voltage (VFB) ..................–0.3V to +6V Junction Temperature ......