厂商：Freescale
类别：16位单片机
厂商：Yageo
类别：通孔电阻器
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Atmel
类别：8051单片机
类别：ATmega系列单片机
类别：板到板窄间距连接器
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特点 V IN Range: 2.6V to 4.4V Ultralow Power Operating Current: 14μA Shutdown Current: <1μA No InductorsShort-Circuit/Thermal ProtectedUltrasmall Application Circuit (<0.045in2 )Low Profile (1mm) ThinSOT?Step-Up Charge Pump Generates 5VOutput Current: 10mA V IN to V OUT Direct Connection for 3V SIMs Switching Frequency: 900kHzSoft-Start Limits Inrush Current at Turn-OnOutput Driven to Ground During Shutdown典型应用典型应用描述The LTC?1986 is a micropower charge pump DC/DC converter that provides power for either 3V or 5V GSM SIM cards. It operates in one of three modes: V OUT = 5V (5V mode), V OUT = V IN (3V mode) or shutdown. The input voltage range is 2.6V to 4.4V and the part can provide 10mA of output current. The LTC1986 allows V IN to drop as low as 2.6V by providing a boost feature in 3V mode. In 3V mode, V OUT is connected directly to V IN through a 2.5W switch until V IN drops below 2.85V. When V IN is below 2.85V, the part automatically boosts V OUT to maintain a regulated 2.9V output, thereby ensuring V OUT stays within the 3V SIM V CC specification.Extremely low operating current (14μA typical with no load) and low external parts count make the part ideally suited for small, light load battery-powered applications. The total PCB area of the application circuit shown below is less than 0.045in2. Protection features include inrush current limiting, undervoltage lockout, short circuit and thermal overload protection. The LTC1986 is available in a low profile (1mm) SOT-23 package.