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LTC3834-1 - 30μA IQ Synchronous Step-Down Controller

The LTC3834-1 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 start- up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. An enhanced feature set part (LTC3834) is available.

Features Wide Output Voltage Range: 0.8V VOUT 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 Typical Application

Applications Automotive Systems Telecom Systems Battery-Operated Digital Devices Distributed DC Power Systems Packaging

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