The LTC3884 operates over an input voltage range of 4.5 to 38V and produces output voltages up to 5.5V. Up to six phases can be paralleled and clocked out-of-phase to minimise input and output filtering. When both outputs are paralleled, the LTC3884 is said to provide less than ±5% current mismatch between phases. Alternatively, the LTC3884 can be used with the LTC3874 phase extender, making it suitable for high current requirements up to 240A. Applications include power distribution, redundant supplies, FPGA, ASIC and processor power.
Housed in a 7 x 7mm QFN-48 package, the LTC3884 is claimed to feature a selectable fixed operating frequency from 200kHz to 1MHz or it can be synchronised to an external clock. The LTC3884’s adjustable and precise current limit threshold can be configured for sense voltages from 10mV to 30mV. Additional features include input current sensing, two power good output signals, programmable soft-start and programmable fault recovery method.
