LTC3829 Datasheet | Linear Technology

3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp Features n Optional Nonlinear Control for Fast Response n ±0.75%, 0.6V Reference Accuracy n PWM, Stage Shedding™ or Burst Mode® Operation n High Efficiency: Up to 95% n RSENSE or DCR Current Sensing n Programmable DCR Temperature pensation n Phase-Lockable Fixed Frequency: 250k Hz to 770k Hz n True Remote Sense Differential Amplifier n Programmable Active Voltage Positioning (AVP) n Triple N-Channel MOSFET Synchronous Drive n Wide VIN Range: 4.5V to 38V Operation n VOUT Range: 0.6V to 5V without Diffamp n VOUT Range: 0.6V to 3.3V with Diffamp n Clock Input and Output for 6-Phase Operation n Adjustable Soft-Start or VOUT Tracking n 38-Pin (5mm × 7mm) QFN and FE Packages n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Notebook and Palmtop puters n Tele Systems n DC Power Distribution Systems DESCRIPTION The LTC®3829 is a high performance 3-phase single output synchronous step-down DC/DC switching controller that drives all N‑channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 770k Hz. Power loss and noise due to ESR of the input capacitors are minimized by operating the three controller output stages out of phase. The LTC3829 can be configured for 6-phase operation, has DCR temperature pensation, and output foldback current limiting. This device Features a precision 0.6V reference and a power good indicator. Light load efficiency is optimized by using a choice of output Stage Shedding or Burst Mode operation. A differential amplifier provides true remote sensing of the output voltage at the point of load. The LTC3829 is available in both low profile 38-pin 5mm × 7mm QFN and Exposed Pad FE packages. All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 6498466,...