厂商：Freescale
类别：16位单片机
厂商：Yageo
类别：通孔电阻器
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Nichicon
类别：钽电容
类别：电压基准
类别：8位单片机
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特点 PolyPhase TM Valley Current Mode Controller Synchronizable to an External Clock with PLLCoincident or Ratiometric TrackingSense Resistor Optional2% to 90% Duty Cycle at 200kHz t ON(MIN) < 100ns True Remote Sensing Differential AmplifierHigh Efficiency at Both Light and Heavy LoadsPower Good Output Voltage Monitor0.6V ±1% ReferenceAdjustable Current LimitProgrammable Soft-Start and Operating FrequencyOutput Overvoltage ProtectionOptional Short-Circuit Shutdown Timer 32-Lead (5mm × 5mm) QFN Package 典型应用典型应用描述The LTC ? 3709 is a single output, dual phase, synchronous step-down switching regulator. The controller uses a constant on-time, 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 input supply voltage. An internal phase-locked loop allows the LTC3709 to be synchronized to an external clock.A TRACK pin is provided for tracking or sequencing the output voltage among several LTC3709 chips or an LTC3709 and other DC/DC regulators. Soft-start is accomplished using an external timing capacitor.Fault protection is provided by an output overvoltage comparator and an optional short-circuit shutdown timer. The current limit level is user programmable. A wide supply range allows voltages as high as 31V to step down to 0.6V.Protected by U.S. Patents, including 5481178, 6476589, 6144194, 5847554, 6177678, 6304066, 6580258, 6674274, 6462525, 6593724.?