ZHCSQ57 October 2022 LM5013
PRODUCTION DATA
During discontinuous conduction mode, the load current is lower than half of the peak-to-peak inductor current ripple and the switching frequency decreases when the load is further decreased in pulse skipping mode. A switching pulse is set when VFB drops below 1.2 V.
As the frequency of operation decreases and VFB remains above 1.2 V (VREF) with the output capacitor sourcing the load current for greater than 15 μs, the converter enters an ultra-low IQ sleep mode to prevent draining the input power supply. The input quiescent current (IQ) required by the LM5013 decreases to 10 μA in sleep mode, improving the light-load efficiency of the regulator. In this mode, all internal controller circuits are turned off to ensure very low current consumption by the device. Such low IQ renders the LM5013 as the best option to extend operating lifetime for off-battery applications. The FB comparator and internal bias rail are active to detect when the FB voltage drops below the internal reference VREF and the converter transitions out of sleep mode into active mode. There is a 9-μs wake-up delay from sleep to active states.