Qualcomm Incorporated

Jiwei Chen

Guoyong Guo

Joseph Dale Rutkowski

Yikai Wang

Zhen Ning Low

Chunping Song

Subbarao Surendra Chakkirala

Yue Jing

Chengyue Yu

David King Wai Li

Jonathan Luty

Xinying Ding

Certain aspects of the present disclosure provide techniques and apparatus for supplying power. One example power supply circuit generally includes a switching regulator including an output coupled to a first power supply rail for coupling to a first load and to a second power supply rail for coupling to a second load, a battery node for coupling to a battery, a switch coupled between the battery node and the second power supply rail, and a logic circuit including a first input coupled to the first power supply rail, a second input coupled to the second power supply rail, and an output coupled to a control input of the switch, the logic circuit being configured to control closing of the switch when a voltage of the first power supply rail falls below a first threshold voltage or a voltage of the second power supply rail falls below a second threshold voltage.

Power supply circuit with power supply rails independently monitored for load attacks

An apparatus is disclosed for implementing a multi-mode direct-current (DC)-to-DC power converter. In an example aspect, the apparatus includes a DC-to-DC power converter with a flying capacitor, an inductor, and four switches. The inductor is coupled between a second node and a battery node. A first switch is coupled between a first node and a first terminal of the flying capacitor. A second switch is coupled between the first terminal and the second node. A third switch is coupled between a second terminal of the flying capacitor and the second node. A fourth switch is coupled between the second terminal and a ground node. The DC-to-DC power converter is configured to selectively transfer power from the first node to the battery node according to a first operational mode and transfer other power from the battery node to the first node according to a second operational mode.

Multi-mode DC-to-DC power converter

Certain aspects of the present disclosure generally relate to an adaptive combination power supply circuit. The adaptive combination power supply circuit may be capable of switching between performing as a three-level buck converter and as a divide-by-two charge pump. One example power supply circuit generally includes a first transistor; a second transistor coupled to the first transistor via a first node; a third transistor coupled to the second transistor via a second node; a fourth transistor coupled to the third transistor via a third node; a capacitive element having a first terminal coupled to the first node and a second terminal coupled to the third node; an inductive element having a first terminal coupled to the second node; and a switch having a first terminal coupled to the first terminal of the inductive element, the switch having a second terminal coupled to a second terminal of the inductive element.

Adaptive combination power supply circuit and charging architecture

Certain aspects of the present disclosure generally relate to a connection terminal pattern and layout for a three-level buck regulator. One example electronic module generally includes a substrate, an integrated circuit (IC) package disposed on the substrate and comprising transistors of a three-level buck regulator, a capacitive element of the three-level buck regulator disposed on the substrate, and an inductive element of the three-level buck regulator disposed on the substrate. In certain aspects, the capacitive element and the inductive element may be disposed adjacent to different sides of the IC package.

Connection terminal pattern and layout for three-level buck regulator

In one embodiment, a control circuit adjusts a duty cycle of a boost converter and comprises a duty cycle limiter generator configured to receive an input voltage provided to the boost converter and to generate a control signal to be provided to the boost converter for adjusting the duty cycle of the boost converter to control the output voltage of the booster converter in response to the input voltage. In one embodiment, the maximum duty cycle limit generator further generates the maximum duty cycle signal in response to an output voltage of the boost converter.

Boost converters having self-adaptive maximum duty-cycle-limit control

The present disclosure pertains to circuits and methods for controlling a boost switching regulator based on inductor current. An input voltage is coupled to a first terminal of an inductor and the second terminal of the inductor is alternately coupled between a reference voltage and a boosted output voltage. The input voltage is further coupled to a first terminal of an integrator circuit, and a second terminal of the integrator circuit may be alternately coupled between the reference voltage and the boosted output voltage, for example, to produce a voltage corresponding to a current in the inductor. The present circuit may be used for voltage control or current control modes, or both, in a boost switching regulator.

Circuits and methods for controlling a boost switching regulator based on inductor current

In one embodiment, a switching regulator includes an inductor, a first switch, and a second switch. The first and second switches generate current in the inductor. Inductor current may flow through the second switch with both a positive and negative polarity. Voltages on terminals of the second switch may be sensed, and an offset applied to generate a level shifted signal. In one embodiment, the switching regulator is a boost switching regulator, and the offset is generated using a current source. Matched MOS transistor switches may be used to couple voltages on terminals of the second switch to amplifier inputs, and the offset is introduced across an MOS switch coupled between one amplifier input and the output.

Switching regulator current sensing circuits and methods

A boost regulator that selectively operates in an asynchronous mode, a synchronous mode, or an adaptive mode. In the adaptive mode, the boost mode regulator controls a high side switch according to an adaptive dead time. Adaptive mode allows the boost regulator to operate more efficiently than in asynchronous mode.

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Fremont, CA, United States of America

Jiwei Chen