LM5642MTC

The LM5642MTC is a current-mode Buck Controller with oscillator synchronization. It consists of two current-mode synchronous buck regulator controllers operating 180° out of phase with each other at a normal switching frequency of 200kHz. Out of phase operation reduces the input RMS ripple current, thereby significantly reducing the required input capacitance. The switching frequency can be synchronized to an external clock between 150 and 250kHz. The two switching regulator outputs can also be paralleled to operate as a dual-phase, single output regulator. The output of each channel can be independently adjusted from 1.3V to 90% of Vin. An internal 5V rail is also available externally for driving bootstrap circuitry. Current-mode feedback control assures excellent line and load regulation and wide loop bandwidth for excellent response to fast load transients.