厂商：Freescale
类别：16位单片机
厂商：
类别：保险丝
类别：瞬态抑制二极管
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Atmel
类别：8051单片机
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特点Up to 500mA Output CurrentNo Inductors2.7V to 5.5V Input Voltage Range2x Efficiency Improvement Over LDOs2-Phase, Spread Spectrum Operation for Low Input and Output Noise Shutdown Disconnects Load from V IN Adjustable Output Voltage Range: 0.9V to 1.6V Fixed Output Voltages: 1.2V, 1.5V Super Burst, Burst and Burst Defeat Operating Modes Low Operating Current: I IN = 35μA (Burst Mode? Operation) Super Burst Operating Current: I IN = 10μA Low Shutdown Current: I IN = 0.01μA Typ Soft-Start Limits Inrush Current at Turn-OnShort-Circuit and Overtemperature ProtectedAvailable in a Thermally Enhanced 10-Pin MSOP Package典型应用典型应用描述The LTC?3251/LTC3251-1.2/LTC3251-1.5 are 2-phase charge pump step-down DC/DC converters that produce a regulated output from a 2.7V to 5.5V input. The parts use switched capacitor fractional conversion to achieve twice the typical efficiency of a linear regulator. No inductors are required. V OUT is resistor programmable from 0.9V to 1.6V or fixed at 1.2V or 1.5V, with up to 500mA of load current available.A unique 2-phase spread spectrum architecture provides a very low noise regulated output as well as low noise at the input.* The parts have four operating modes: Continuous Spread Spectrum, Spread Spectrum with Burst Mode operation, Super Burst? mode operation and shutdown.Low operating current (35μA in Burst Mode operation, 10μA in Super Burst mode operation) and low external parts count make the LTC3251/LTC3251-1.2/LTC3251-1.5 ideally suited for space-constrained battery-powered applications. The parts are short-circuit and overtemperature protected, and are available in a thermally enhanced 10-pin MSOP package.*U.S. Patent #6, 411, 531