Beschreibung
The LTC®7802 is a high performance dual step-down synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant fre¬quency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7802 oper¬ates from a wide 4.5V to 40V input supply range. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase. The very low no-load quiescent current extends oper¬ating runtime in battery powered systems. OPTI-LOOP compensation allows the transient response to be opti¬mized over a wide range of output capacitance and ESR values. The LTC7802 features a precision 0.8V reference and power good output indicators. The MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.