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DESCRIPTION The ETA1O39 is a high efciency synchronous step-up converter that can provide up to 1.5A to a fixed output upto5Vfromalow voltage source. Unlike most step-up converter, it incorporates circuits that disconnect the input from output, during shutdown, short-circuit, output current overloading. or other events when output is higher than the input. This eliminates the need for an external MOSFET and its control circuitry to disconnect the input from output, and provides robust output overload protection. And ETAIO39 also provides the flexilty of setting input peak current limit and thus, output current is limited. A switching frequency of |MHz minimizes solution footprint by alowing the use of tiny and low profile inductors and ceramic capacitors. An internal synchronous MOSFET provides highest eficincy and with a current mode control that is interally compensated, external parts count is reduced to minimal. ETAIO39 is housed in a tiny S0T23-6 package. FEATURES Output Disconnect Short-circuit Protection 5V/1.5A Output Power Output to Input Reversed Current Protection Up to 96% Eficiency 40μA No load la and light load PFM Mode Internal Synchronous Rectifier Current Limit Programmable Current Mode control Logic Control Shutdown and Thermal shutdown SOT23-6 Package . APPLICATIONS USB OTG for MIDs, Smartphones Mobile back-up Battery Chargers Alkaline, NiCd, and NiMh batteries applications USB powered devices
