LTC3811

LTC3811 FEATURES High Speed Dual, Multiphase Step-Down DC/DC DESCRIPTION Controller ■ Fixed Frequency, Peak Current Mode Control ■ ±0.5% Output Accuracy Over Temperature ■ Optimized for Low VOUT Applications (Up to 3.3V) ■ Dual or Single Output, Multiphase Operation ■ Wide VIN Range: 4.5V to 30V Operation ■ High Speed Differential Remote Sense Amplifier ■ Inductor DCR or Sense Resistor Capable ■ Adjustable Peak Current Sense Voltage: 24mV to 85mV ■ Very Low Duty Cycle Operation: tON(MIN) = 65ns (Typ) ■ Powerful Internal Gate Drivers ■ Output Voltage Soft-Start, Tracking and Sequencing ■ Programmable Load Line for Reduced COUT ■ Clock Input and Output for Up to 12-Phase Operation ■ Fixed Frequency Operation from 250kHz to 750kHz ■ PLL Synchronization from 150kHz Up to 900kHz ■ Selectable CCM or DCM Operation ■ Available in 5mm × 7mm QFN and G36 Packages APPLICATIONS ■ Network Servers ■ High Current ASIC Supplies ■ Low Voltage Power Distribution The LTC®3811 is a dual, PolyPhase® synchronous stepdown switching regulator controller optimized for output voltages up to 3.3V. The LTC3811 includes high bandwidth error amplifiers as well as a high speed differential remote sense amplifier. The sense voltage range is programmable from 24mV to 85mV, allowing the use of either the inductor DCR or a discrete sense resistor. Multiphase operation is made possible using the MODE/SYNC input, the CLKOUT output and the PHASEMODE control pin, allowing 1-, 2-, 3-, 4-, 6- or 12-phase operatio...