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：Murata
类别：通信设备用滤波器
厂商：Linear
类别：功率控制
类别：监控电路
类别：8位单片机
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特点 Wide V IN Range: 4V to 36V Sense Resistor OptionalTrue Current Mode Control2% to 90% Duty Cycle at 200kHz t ON(MIN) Stable with Ceramic C OUT Dual N-Channel MOSFET Synchronous DrivePower Good Output Voltage Monitor±1% 0.6V ReferenceAdjustable Current LimitAdjustable Switching FrequencyProgrammable Soft-StartOutput Overvoltage ProtectionOptional Short-Circuit Shutdown Timer Micropower Shutdown: I Q Available in a 1mm 20-Lead TSSOP Package典型应用典型应用描述The LTC?3778 is a synchronous step-down switching regulator controller for computer memory, automobile and other DC/DC power supplies. The controller uses a valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in V IN and V OUT .Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference, and can assist secondary winding regulation when the main output is lightly loaded. SENSE + and SENSE – pins provide true Kelvin sensing across the optional sense resistor or the sychronous MOSFET.Fault protection is provided by internal foldback current limiting, an output overvoltage comparator, optional short-circuit shutdown timer and input undervoltage lockout. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit level is user programmable. Wide supply range allows operation from 4V to 36V at the input and from 0.6V up to (0.9)V IN at the output.