厂商：Freescale
类别：16位单片机
厂商：Linear
类别：开关稳压器
类别：DC/DC控制器
厂商：
类别：瞬态抑制二极管
类别：PhotoMOS(MOSFET输出光电耦合器)
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特点 Wide Output Voltage Range: 0.8V < or = V OUT < or = 14V Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise OPTI-LOOP? Compensation Minimizes C OUT ±1% Output Voltage AccuracyPower Good Output Voltage MonitorPhase-Lockable Fixed Frequency 250kHz to 550kHzLatched Short-Circuit Shutdown (LTC3727 Only)Dual N-Channel MOSFET Synchronous Drive Wide V IN Range: 4V to 36V Operation Very Low Dropout Operation: 99% Duty CycleAdjustable Soft-Start Current RampingFoldback Output Current LimitingOutput Overvoltage Protection Low Shutdown I Q : 20μA Selectable Constant Frequency or Burst Mode? OperationSmall 28-Lead SSOP PackageLTC3727-1 Also Available in the 5mm x 5mm QFN Package典型应用描述The LTC?3727/LTC3727-1 are high performance dual step-down switching regulator controllers that drive all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. There is a precision 0.8V reference and a power good output indicator. A wide 4V to 30V (36V maximum) input supply range encompasses all battery chemistries.A RUN/SS pin for each controller provides soft-start, and on the LTC3727GN, optional timed, short-circuit shutdown. Current foldback limits MOSFET heat dissipation during short-circuit conditions when overcurrent latchoff is disabled. Output overvoltage protection circuitry latches on the bottom MOSFET until V OUT returns to normal. The FCB mode pin can select among Burst Mode, constant frequency mode and continuous inductor current mode or regulate a secondary winding.