FEATURES• Integrated 80mΩ Power MOSFET • 2V to 24V Input Voltage • 1.2MHz Fixed Switching Frequency • Internal 4A Switch Current Limit • Adjustable Output Voltage • Internal Compensation • Up to 28V Output Voltage • Automatic Pulse Frequency Modulation Mode at Light Loads • up to 97% Efficiency • Available in a 6-Pin SOT23-6 PackageAPPLICATIONS• Battery-Powered Equipment • Set-Top Boxed • LCD Bais Supply • DSL and Cable Modems and Routers • Networking cards powered from PCI or PCI express slotsTYPICAL APPLICATIONFigure 1. Basic Application CircuitThe AP6608 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small, low power applications. The AP6608 switches at 1.2MHz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height. Internal soft-start results in small inrush current and extends battery life. The AP6608 features automatic shifting to pulse frequency modulation mode at light loads. The AP6608 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload. The AP6608 is available in a small 6-pin SOT-23 package.

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