LTC3834

FEATURES n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V n Low Operating Quiescent Current: 30µA n OPTI-LOOP® Compensation Minimizes COUT n ±1% Output Voltage Accuracy n Wide VIN Range: 4V to 36V n Phase-Lockable Fixed Frequency 140kHz to 650kHz 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 Clock Output for PolyPhase® Applications n Output Overvoltage Protection n Low Shutdown IQ: 4µA n Internal LDO Powers Gate Drive from VIN or VOUT n Selectable Continuous, Pulse Skipping or Burst Mode® Operation at Light Loads n Small 20-Lead TSSOP or 4mm × 5mm QFN Package APPLICATIONS n Automotive Systems n Telecom Systems n Battery-Operated Digital Devices n Distributed DC Power Systems LTC3834 30µA IQ Synchronous Step-Down Controller DESCRIPTION The LTC®3834 is a high performance step-down switching regulator controller that drives an all N-channel synchronous power MOSFET stage. A constant-frequency current mode architecture allows a phase-lockable frequency of up to 650kHz. The 30µA no-load quiescent current extends operating life in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3834 features a precision 0.8V reference and a power good output indicator. The 4V to 36V input supply range encompasses a wide range ...