LM2642MTC

DC/DC контроллер, 2-фазный, 4.5В до 30В, 2 выхода, синхронный понижающий, 340кГц, TSSOP-28.

The LM2642MTC is a 2-phase emulated two current-mode synchronous Buck Controller with a switching frequency of 300kHz. It operates 180° out of phase. This feature reduces the input ripple RMS current, there by significantly reducing the required input capacitance. 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 1.3 to VIN maximum duty cycle. An internal 5V rail is also available externally for driving bootstrap circuitry. Current-mode feedback control assures excellent line and load regulation and a wide loop bandwidth for excellent response to fast load transients. Current is sensed across either the Vds of the top FET or across an external current-sense resistor connected in series with the drain of the top FET. Current limit is independently adjustable for each channel.