LTC3834-1

U U LTC3834-1 30μA IQ Synchronous Step-Down Controller FEATURES ■ Wide Output Voltage Range: 0.8V V OUT 10V ■ Low Operating IQ: 30μA ■ OPTI-LOOP® Compensation Minimizes COUT ■ ±1% Output Voltage Accuracy ■ Wide VIN Range: 4V to 36V ■ Phase-Lockable Fixed Frequency 140kHz to 650kHz ■ Dual N-Channel MOSFET Synchronous Drive ■ Very Low Dropout Operation: 99% Duty Cycle ■ Adjustable Output Voltage Soft-Start or Tracking ■ Output Current Foldback Limiting ■ Output Overvoltage Protection ■ Low Shutdown IQ: 4μA ■ Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads ■ Small 16-Lead Narrow SSOP or 5mm × 3mm DFN Package U APPLICATIO S ■ Automotive Systems ■ Telecom Systems ■ Battery-Operated Digital Devices ■ Distributed DC Power Systems DESCRIPTIO The LTC®3834-1 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 LTC3834-1 features a precision 0.8V reference . The 4V to 36V input supply range encompasses a wide range of battery chemistries. The TRACK/SS pin ramps the output voltage during startup. Current foldback limits MOSFET heat dissipation during short-circuit conditions....