厂商：Freescale
类别：16位单片机
厂商：Yageo
类别：通孔电阻器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Murata
类别：通信设备用滤波器
厂商：
类别：功率控制
我要询价我要收藏
特点High Efficiency Dual Step-Down Outputs: Up to 96%600mA Current per Channel at VIN = 3VOnly 35μA Quiescent Current During Operation (Both Channels)2.25MHz Constant-Frequency Operation2.5V to 5.5V Input Voltage RangeLow Dropout Operation: 100% Duty CycleNo Schottky Diodes RequiredInternally Compensated for All Ceramic CapacitorsIndependent Internal Soft-Start for Each ChannelAvailable in Fixed Output VersionsCurrent Mode Operation for Excellent Line and Load Transient Response0.6V Reference Allows Low Output VoltagesUser-Selectable Burst Mode? OperationShort-Circuit ProtectedUltralow Shutdown Current: IQ < 1μAAvailable in Small MSOP or 3mm × 3mm DFN-8 Packages典型应用典型应用描述The LTC3419 is a dual, 2.25MHz, constant-frequency, synchronous step-down DC/DC converter in a tiny 3mm × 3mm DFN package. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are supported with the 0.6V feedback reference voltage. Each regulator can supply 600mA output current.The input voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. Supply current during operation is only 35μA and drops to <1μA in shutdown. A user-selectable mode input allows the user to trade off between high efficiency Burst Mode operation and pulse-skipping mode.An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during start-up. Both outputs are internally compensated to work with ceramic output capacitors. The LTC3419 is available in a low profile (0.75mm) 3mm × 3mm DFN package. The LTC3419 is also available in a fixed output voltage configuration selected via internal resistor dividers (see Table 2).