厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：
类别：电压基准
类别：8位单片机
类别：信号继电器
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特点Optimized Features for WCDMA HandsetsRegulated Output with Input Voltages Above, Below, or Equal to the Output0.5V to 5V Output RangeUp to 400mA Continuous Output Current From a Single Lithium-Ion CellMinimal External Components1.5MHz Fixed Frequency OperationInternal Loop Compensation for Fast Response <25μs Full Scale Output Slewing; COUT 4.7μFOutput Disconnect in Shutdown2.75V to 5.5V Input<1μA Shutdown CurrentInternal Soft-StartOutput Overvoltage ProtectionSingle Inductor, No Schottky Diodes RequiredSmall, Thermally Enhanced 8-Lead (3mm × 3mm) DFN Package典型应用典型应用描述The LTC3444 has been optimized for use in 3G WCDMA applications. A unique design yields high efficiency at very low output voltages while also eliminating external components. The high speed error amplifier provides the fast transient response required to slew the RF power amplifier from standby to transmit and transmit to stand by power levels. Output overvoltage protection protects the RF power amplifier.Operating frequency is internally set to 1.5MHz to minimize external component size while maximizing efficiency. Other features include <1μA shutdown current, internal soft-start, peak current limit and thermal shutdown.The LTC3444 is available in a small, thermally enhanced 8-lead (3mm × 3mm) DFN package.