LTC3865-1 Datasheet | Linear Technology

LTC3865/LTC3865-1 Features Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs DESCRIPTION n Dual, 180° Phased Controllers n 2-Pin VID Output Voltage Programming from 0.6V to 5V n High Efficiency: Up to 95% n RSENSE or DCR Current Sensing n Phase-Lockable Fixed Frequency 250k Hz to 770k Hz n Adjustable Current Limit n Dual N-Channel MOSFET Synchronous Drive n Wide VIN Range: 4.5V to 38V Operation n Adjustable Soft-Start Current Ramping or Tracking n Output OV Protection With Reverse Current Limit n Power Good Output Voltage Monitor n 32-Pin 5mm × 5mm QFN and 38-Lead TSSOP Packages APPLICATIONS n DC Power Distribution Systems L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, μModule, Linear Technology and the Linear logo are registered trademarks and No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258. The LTC®3865/LTC3865-1 are high performance dual synchronous step-down DC/DC switching regulator controllers that drive 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 are minimized by operating the two controller output stages out of phase. OPTI-LOOP® pensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. Independent track/soft-start pins for each controller ramp the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The MODE/PLLIN pin selects among Burst Mode® operation, pulse-skipping mode, and continuous inductor current mode. The output voltages can be precisely programmed by pin strapping or external resistors. The LTC3865/LTC3865-1 are available in low profile (5mm × 5mm) 32-pin QFN and 38-Lead thermally enhanced TSSOP packages. POWER LOSS...