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Switching Regulator

Wed, 09/11/2002 - 5:17am
The LTC3732 is a 3-phase, 5-bit VID, 600 kHz, synchronous step-down switching regulator that drives N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 600 kHz per phase to minimize the RMS current dissipated by the ESR of both the input and output filter capacitors. The LTC3732 utilizes a true current mode architecture to provide output currents up to 60 amps while maintaining current balancing between the three output power stages to within ۯ%. To optimize efficiencies at light loads, the LTC3732 switches between output stage shedding and Burst Mode® operation. With its integrated 5-bit VID DAC, output voltages of 1.075 V to 1.85 V are programmable in 25 mV.
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