厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：微动开关
厂商：Linear
类别：DC/DC控制器
类别：PhotoMOS(MOSFET输出光电耦合器)
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特点2.7V to 5.5V Input Voltage RangeNo InductorsLi-Ion (3.6V) to 1.5V with 81% EfficiencyLow Noise Constant Frequency OperationOutput Voltages: 1.5V ±4%, 1.2V ±4%Output Current: 250mA Shutdown Disconnects Load from V IN Low Operating Current: I Q = 35μA Low Shutdown Current: I SD <1μA Oscillator Frequency = 1.5MHzSoft-Start Limits Inrush Current at Turn-OnShort-Circuit and Overtemperature ProtectedLow Profile (1mm) ThinSOT? Package典型应用典型应用描述The LTC?3250-1.5/LTC3250-1.2 are charge pump stepdown DC/DC converters that produce a 1.5V or 1.2V regulated output from a 2.7V to 5.5V input. The parts use switched capacitor fractional conversion to achieve typical efficiency two times higher than that of a linear regulator. No inductors are required.A unique constant frequency architecture provides a low noise regulated output as well as lower input noise than conventional charge pump regulators.* High frequency operation (f OSC = 1.5MHz) simplifies filtering to further reduce conducted noise. The part also uses Burst Mode? operation to improve efficiency at light loads.Low operating current (35μA with no load, <1μA in shutdown) and low external parts count (three small ceramic capacitors) make the LTC3250-1.5/LTC3250-1.2 ideally suited for space constrained battery powered applications. The parts are short-circuit and overtemperature protected, and are available in a low profile (1mm) 6-pin ThinSOT? package.*U.S. Patent #6, 411, 531