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The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operaTIng mode to switch from PWM mode to skip mode under light load condiTIons. The skip mode enables a lower operaTIng frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load condiTIons. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs.
