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：TDK
类别：绕组电感器
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特点 Two Ouput Stages Operate Antiphase Reducing Input Capacitance and Power Supply Noise 5-Bit VID Control (VRM 8.4 Compliant) V OUT : 1.3V to 3.5V in 50mV/100mV Steps Current Mode Control Ensures Current SharingTrue Remote Sensing Differential Amplifier OPTI-LOOP? Compensation Minimizes C OUT Programmable Fixed Frequency: 150kHz to 300kHz—Effective 300kHz to 600kHz Switching Frequency ±1% Output Voltage Accuracy Wide V IN Range: 4V to 36V Operation Adjustable Soft-Start Current RampingInternal Current FoldbackShort-Circuit Shutdown Timer with Defeat OptionOvervoltage Soft-Latch Eliminates Nuisance TripsLow Shutdown Current: 20μASmall 36-Lead Narrow (0.209典型应用典型应用描述描述 The LTC?1709 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at a optimum frequency for efficiency. Thermal design is also simplified. An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required in high current applications. The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipaton during short-circuit conditions when overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values.