Loop-handover technique for digitally controlled multiple-output dc-dc converters

The loop-handover (LHO) technique is proposed to overcome the problem of close-loop performance in digitally controlled single-inductor multiple-output dc-dc boost converters during start-up. The presented technique utilises an existing clock source and requires only a small number of blocks. It also occupies a smaller silicon area, thus consuming low power and increasing efficiency. The presented technique is validated with proposed on-chip digital controller with multiple-output boost converter architecture using segmented delay line digital pulse width modulation. Experimental results show a successful close loop with reduced transients by using the simpler LHO technique.