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L6920DB
L6920DB Synchronous rectifier step up converter General features ■ 0.8V start up input voltage ■ Up to 5.5V operating input voltage ■ Internal synchronous rectifier ■ Adjustable output voltage from 1.8V ■ 3.3V and 5V fixed output voltages ■ Low battery voltage detection Description ■ Reverse battery protection ■ 750mA input current limit ■ Switching frequency up to 1MHz The L6920DB is a high efficiency monolithic step up switching converter IC especially designed for battery powered application. ■ 1.23V reference voltage available Applications ■ Conversion from 1 to 3 alkaline, ■ NiMH, NiCd battery cells or 1 lithium ION ■ PDA and handheld instruments ■ Digital cameras ■ Cellular phones ■ GPS ■ MSOP8 Package is MSOP8 in order to minimize PCB space. It requires only three external components to realize the conversion from the battery voltage to the selected output voltage. Distributed power The minimum output voltage is 1.8V: suitable to supply the most advanced ASIC and µP. High switching frequency allows for a low profile, small sized inductor and output capacitor to be used. Reference voltage, low battery detection and Shutdown are provided together with over current. Application circuit L6920DB October 2006 Rev 5 3.3V 1/16 www.st.com 16
STM
STMicroelectronics NV
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