The LTC3890EGN-3#PBF is a high-performance dual step-down Switching Regulator DC/DC Controller drives all N-channel synchronous power MOSFET stages. The constant frequency current-mode architecture allows a phase lockable frequency of up to 850kHz. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase. The 50μA no-load quiescent current extends operating life in battery-powered systems. OPTI-LOOP? compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. A wide 4 to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Independent TRACK/SS pins for each controller ramp the output voltages during start-up. current-mode control limits the inductor current during short-circuit conditions. The PLLIN/MODE pin selects among burst mode operation, pulse-skipping mode or continuous conduction mode at light loads.
RSENSE or DCR current sensing
Out-of-phase controllers reduce input capacitance and power supply induced noise
Selectable continuous, pulse-skipping or low ripple burst mode operation at light loads
(EN)
