LTC3827-1

LTC3827-1 Low IQ, Dual, 2-Phase Synchronous Step-Down Controller FEATURES DESCRIPTION n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V n Low Operating IQ: 80μA (One Channel On) n Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n OPTI-LOOP® Compensation Minimizes COUT n ±1% Output Voltage Accuracy n Wide VIN Range: 4V to 36V Operation n Phase-Lockable Fixed Frequency 140kHz to 650kHz n Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads n Dual N-Channel MOSFET Synchronous Drive n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Output Voltage Soft-Start or Tracking n Output Current Foldback Limiting n Power Good Output Voltage Monitor n Output Overvoltage Protection n Low Shutdown IQ: 8μA n Internal LDO Powers Gate Drive from VIN or VOUT n Small 28-Lead SSOP Package APPLICATIONS n Automotive Systems n Battery-Operated Digital Devices n Distributed DC Power Systems The LTC®3827-1 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 650kHz. Power loss and noise due to the ESR of the input capacitor ESR are minimized by operating the two controller output stages out of phase. The 80μA no-load quiescent current extends operating life in battery-powered systems. OPTI-LOOP compensation allows the transient response to be optimized ove...