Dialog Semiconductor (UK) Limited

Apple Inc.

Turev Acar

Selcuk Talay

Kemal Ozanoglu

Burak Dundar

Emre Topcu

Marinus Wilhelmus Kruiskamp

An apparatus and method for a voltage reference circuit with flexible and adjustable voltage settings. A voltage reference circuit, comprising a PTAT Current Generator configured to provide current through a first resistor, a CTAT Current Generator configured to provide a CTAT current through a second resistor, a PTAT-CTAT Adder circuit configured to sum the PTAT current, and the CTAT current, wherein said sum of the PTAT and CTAT current through a third resistor is configured to provide an output voltage greater than a silicon bandgap voltage.

Apparatus and method for high voltage bandgap type reference circuit with flexible output setting

The present disclosure provides a DC-DC switching converter architecture that utilizes the chip's thermal capacity effectively by implementing adaptive switching frequency scaling over the operation region, keeping the die/package temperature constant. The power budget is effectively utilized, and the external components such as capacitors, inductors, and pass device sizes are reduced, thereby increasing the efficiency of the switching converter. An adaptive frequency scalar is optimized, avoiding losses, especially at high loads. The larger the input and output voltage ranges, the bigger the benefit the disclosure becomes.

Power dissipation regulated buck architecture

A node that stores a charge is discharged in two phases, starting with a current controlled phase where a current mirror sink controls the current sunk from the node, and then moving to a second phase where a resistive discharge is provided. A pull down device such as a transistor switches from its saturation mode in the first phase to its linear mode in the second phase. a discharge circuit implementing this method provides optimized area and control for the discharge process as compared with approaches that rely solely on current mirroring or resistive discharging.

Methods and apparatus for discharging a node of an electrical circuit

The disclosure describes an adaptive technique for generating minimum dead time in a DC-DC switching power converter, while ensuring no short circuit losses occur, resulting in efficiency improvement of the switching converter. In addition, this adaptive scheme makes sure that even the ambient conditions of the switching converter give the best decision at the ON/OFF timings of the switches. Body diode conduction feedback is detected, with reduced process sensitivity, and an algorithm is disclosed that finds the minimum dead time for a given load current, temperature, and process conditions.

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Turev Acar