LTC3729

LTC3729 FEATURES 550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator DESCRIPTION n Wide VIN Range: 4V to 36V Operation n Reduces Required Input Capacitance and Power Supply Induced Noise n ±1% Output Voltage Accuracy n Phase-Lockable Fixed Frequency: 250kHz to 550kHz n True Remote Sensing Differential Amplifier n PolyPhase® Extends from Two to Twelve Phases n Reduces the Size and Value of Inductors n Current Mode Control Ensures Current Sharing n 1.1MHz Effective Switching Frequency (2-Phase) n OPTI-LOOP® Compensation Reduces COUT n Power Good Output Voltage Indicator n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Soft-Start Current Ramping n Internal Current Foldback Plus Shutdown Timer n Overvoltage Soft-Latch Eliminates Nuisance Trips n Available in 5mm × 5mm QFN and 28-Lead SSOP Packages APPLICATIONS n Desktop Computers/Servers n Large Memory Arrays n DC Power Distribution Systems L, LT, LTC, LTM, PolyPhase, OPTI-LOOP, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. The LTC®3729 is a multiple phase, synchronous step‑down current mode switching regulator controller that drives N‑channel external power MOSFET stages in a phase‑lockable fixed frequency architecture. The PolyPhase controller drives its two output stages out of phase at frequencies up to 550kHz to minimize the RMS ripple currents in both input and output c...