LM2652

The LM2652 is a monolithic dual synchronous buck regulator designed for low output voltages. Special attention to power sequencing, voltage accuracy and start-up characteristics has been made to enable a simple solution to the challenging requirements of FPGA & DSP power. Four integrated FET power switches ensure high efficiency, minimal external components and maximum ease-of-use. The IC can accept an input of 2.7V to 5.5V and deliver 1.5A per channel. The bias and power inputs can run from different rails to balance system power. Output voltages are factory programmable from 0.8V to 3.3V in 50mV steps. The LM2652 is available in two switching frequency options (650kHz and 1300kHz) and both options can be synchronized to an external clock of 300-1600kHz. The two switching channels run 180° out of phase to reduce input capacitor size and cost. Output fault protection is provided by the use of cycle-bycycle current limit and frequency fold-back. Separate softstart, power good flags and output enables allow for power sequencing flexibility.