Dialog Semiconductor (UK) Limited

Santosh Kulkarni

Jens Masuch

A single/Multi-phase PMIC built on silicon substrate with coil layers processed on top of the PMIC layers' is provided. The integrated coil is in a spiral form, with a gap at the center of the coil, making additional metal routing not required. The integrated coil has connection pads located in the center gap of the spiral form, limiting the overall inductor resistance to the device only. The on-die inductor may have a magnetic core wrapping the windings. The spiral form may be implemented in a circular design, or a racetrack (elongated spiral) design. The coil layers may be implemented as multiple coil layers or as a single coil layer, connected in parallel (with the same I/O pads), reducing the resistance and maintaining the inductance.

Integrated voltage regulator with integrated air-core inductor

A Hybrid DC-DC switching converter architecture is described. The Hybrid architecture includes a capacitive converter cascaded by an inductive converter for a boost switching converter, and an inductive converter cascaded by a capacitive converter for a buck switching converter. A capacitor at an intermediate node and a switch in the capacitive converter are removed. Reducing the switching converter by one switch and one capacitor results in a smaller implementation area. A single regulation circuit and an inductor with a smaller saturation current (Isat) are used.

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Swindon, United Kingdom

Santosh Kulkarni