LTC3834 Datasheet | Linear Technology

Features n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V n Low Operating Quiescent Current: 30µA n OPTI-LOOP® pensation Minimizes COUT n ±1% Output Voltage Accuracy n Wide VIN Range: 4V to 36V n Phase-Lockable Fixed Frequency 140k Hz to 650k Hz 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 Poly Phase® 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 Tele Systems n Battery-Operated Digital Devices n Distributed DC Power Systems 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 650k Hz. The 30µA no-load quiescent current extends operating life in battery powered systems. OPTI-LOOP pensation 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 enpasses 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. A reduced feature set version of the part (LTC3834-1) is available in a smaller, lower pin count package. parison of LTC3834 and LTC3834-1 PART # LTC3834 CLKOUT/ PHASMD Yes EXTVCC Yes PGOOD Yes PACKAGES FE20/4mm × 5mm QFN LTC3834-1 No No No GN16/3mm × 5mm DFN L, LT, LTC, LTM, Burst Mode, Poly Phase and OPTI-LOOP are...