厂商：Freescale
类别：16位单片机
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Panasonic
厂商：Atmel
类别：EEPROM
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特点Synchronous Rectification: Up to 96% EfficiencyTrue Output DisconnectInrush Current LimitingVery Low Quiescent Current: 12μAUp to 1.5A Continuous Output CurrentFixed Frequency Operation Up to 3MHz0.5V to 4.5V Input Range2.4V to 5.25V Adjustable Output VoltageGuaranteed 1V Start-UpProgrammable Current LimitProgrammable Soft-StartSynchronizable OscillatorManual or Automatic Burst Mode? OperationLow-Battery Comparator<1μA Shutdown Current1.22V Reference Output VoltageSmall (4mm x 4mm) Thermally Enhanced QFN Package典型应用典型应用描述The LTC?3421 is a high efficiency, current mode, fixed frequency, step-up DC/DC converter with true output disconnect and inrush current limiting. The device includes a 0.10 Ohm N-channel MOSFET switch and a 0.14 Ohm P-channel synchronous rectifier. This product has the ability to simply program the output voltage, switching frequency, current limit, soft-start, Burst Mode threshold and loop compensation with external passive components.Quiescent current is only 12μA during Burst Mode operation, maximizing battery life in portable applications. The oscillator frequency can be programmed up to 3MHz and can be synchronized to an external clock applied to the SYNC pin. An open-drain uncommitted low-battery comparator is included. The part maintains operation in applications with a secondary cell powering the output voltage during shutdown.Other features include: 1μA shutdown, antiringing control, thermal limit and reference output.The LTC3421 is available in a small 4mm x 4mm QFN package.