厂商：Freescale
类别：16位单片机
厂商：Linear
类别：精准放大器
厂商：Littelfuse
类别：保险丝
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：ATmega系列单片机
类别：热插拔控制器
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特点Low Noise Constant Frequency Operation2.7V to 5.5V Input Voltage RangeNo InductorsTypical Efficiency 25% Higher Than LDOs Shutdown Disconnects Load from V IN Output Voltage: 1.8V ±4% or 1.5V ±4%Output Current: 250mA Low Operating Current: I IN = 180μA Typ Low Shutdown Current: I IN = 10μA Typ Oscillator Frequency: 1.5MHzSoft-Start Limits Inrush Current at Turn OnShort-Circuit and Overtemperature ProtectedAvailable in an 8-Pin MSOP Package典型应用典型应用描述The LTC ? 1911 is a switched capacitor step-down DC/DC converter that produces a 1.5V or 1.8V regulated output from a 2.7V to 5.5V input. The part uses switched capacitor fractional conversion to achieve high efficiency over the entire input range. No inductors are required. Internal circuitry controls the step-down conversion ratio to optimize efficiency as the input voltage and load conditions vary.* Typical efficiency is over 25% higher than that of a linear regulator.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 output filtering to further reduce conducted noise. To optimize efficiency, the part enters Burst Mode ? operation under light load conditions.Low operating current (180μA with no load, 10μA in shutdown) and low external parts count (two 1μF flying capacitors and two 10μF bypass capacitors) make the LTC1911 ideally suited for space constrained batterypowered applications. The part is short-circuit and overtemperature protected, and is available in an 8-pin MSOP package.