厂商：Freescale
类别：16位单片机
厂商：Littelfuse
类别：保险丝
厂商：
类别：自恢复PTC
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Linear
类别：电压基准
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特点Dynamically Adjustable Output from 0.3V to 3.5VVery Low Quiescent Current: Only 20μA During Operation600mA Output CurrentInternal P-Channel MOSFET Bypass TransistorHigh Efficiency: Up to 96%1.5MHz Constant Frequency OperationNo Schottky Diode RequiredLow Dropout Operation: 100% Duty Cycle2.5V to 5V Input Voltage RangeDrives Optional External P-Channel MOSFETShutdown Mode Draws < 1μA Supply CurrentCurrent Mode Operation for Excellent Line and Load Transient ResponseOvertemperature ProtectedAvailable in 8-Lead 3mm x 3mm DFN Package典型应用典型应用描述The LTC?3403 is a high efficiency monolithic synchronous buck regulator optimized for WCDMA power amplifier applications. The output voltage can be dynamically programmed from 0.3V to 3.5V. At V OUT > 3.6V an internal bypass P-channel MOSFET connects V OUT directly to V IN , eliminating power loss through the inductor. Selectable forced continuous mode enables fast V OUT response to the controlling input.Supply current is only 20μA in Burst Mode? operation and drops to <1μA in shutdown. The 2.5V to 5V input voltage range makes the LTC3403 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode.The LTC3403 is available in a low profile 8-lead 3mm x 3mm DFN package.