LTC3835-1 Datasheet | Linear Technology

Features n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V n Low Operating IQ: 80μA n OPTI-LOOP® pensation Minimizes COUT n ±1% Output Voltage Accuracy n Wide VIN Range: 4V to 36V Operation 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 Output Overvoltage Protection n Low Shutdown IQ: 10μA n Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads n Small 16-Lead Narrow SSOP or 3mm × 5mm DFN Package APPLICATIONS n Automotive Systems n Tele Systems n Battery-Operated Digital Devices n Distributed DC Power Systems Low IQ Synchronous Step-Down Controller DESCRIPTION The LTC®3835-1 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 650k Hz. The 80μA 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 LTC3835-1 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 startup. Current foldback limits MOSFET heat dissipation during short-circuit conditions. parison of LTC3835 and LTC3835-1 PART # LTC3835 CLKOUT/ PHASMD EXTVCC YES PGOOD YES PACKAGES FE20/4 × 5 QFN GN16/3 × 5 DFN L, LT, LTC, LTM, Burst Mode, and OPTI-LOOP are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5408150, 5481178, 5705919, 5929620, 6304066, 6498466, 6580258, 6611131. TYPICAL...