Patents by Inventor Volterra Semiconductor Corporation

Volterra Semiconductor Corporation has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130222099
    Abstract: An M phase coupled inductor includes a magnetic core including a first end magnetic element, a second end magnetic element, and M legs disposed between and connecting the first and second end magnetic elements. M is an integer greater than one. The coupled inductor further includes M windings, where each winding has a substantially rectangular cross section. Each one of the M windings is at least partially wound about a respective leg.
    Type: Application
    Filed: March 10, 2013
    Publication date: August 29, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: VOLTERRA SEMICONDUCTOR CORPORATION
  • Publication number: 20130207627
    Abstract: Disclosed are devices, apparatus, circuitry, components, mechanisms, modules, systems, and methods for virtual output voltage sensing for feed-forward control of a voltage regulator. A buffer has an input coupled to sense a monitored signal indicating a duty cycle of switch circuitry coupled to an output filter of the voltage regulator. The buffer is configured to provide at an output, responsive to the monitored signal, a buffer output signal having a high reference voltage for a high side on time and a low reference voltage for a low side on time of the switch circuitry. A filter is coupled to receive and filter the buffer output signal to provide a feed-forward signal indicating the output voltage of the voltage regulator. Control circuitry is configured to control the switching of the switch circuitry responsive to the feed-forward signal.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 15, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: VOLTERRA SEMICONDUCTOR CORPORATION
  • Publication number: 20130200452
    Abstract: A LDMOS transistor is implemented in a first impurity region on a substrate. The LDMOS transistor has a source that includes a second impurity region. The second impurity region is implanted into the surface of the substrate within the first impurity region. Additionally, the LDMOS transistor has a drain that includes a third impurity region. The third impurity region is implanted into the surface of the substrate within the first impurity region. The third impurity region is spaced a predetermined distance away from a gate of the LDMOS transistor. The drain of the LDMOS transistor further includes a fourth impurity region within the third impurity region. The fourth impurity region provides an ohmic contact for the drain.
    Type: Application
    Filed: January 14, 2013
    Publication date: August 8, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: Volterra Semiconductor Corporation
  • Publication number: 20130187737
    Abstract: An M phase coupled inductor includes a magnetic core including a first end magnetic element, a second end magnetic element, and M legs disposed between and connecting the first and second end magnetic elements. M is an integer greater than one. The coupled inductor further includes M windings, where each winding has a substantially rectangular cross section. Each one of the M windings is at least partially wound about a respective leg.
    Type: Application
    Filed: March 10, 2013
    Publication date: July 25, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: VOLTERRA SEMICONDUCTOR CORPORATION
  • Publication number: 20130113596
    Abstract: Methods and structures for constructing a magnetic core of a coupled inductor. The method provides for constructing N-phase coupled inductors as both single and scalable magnetic structures, where N is an integer greater than 1. The method additionally describes how such a construction of the magnetic core may enhance the benefits of using the scalable N-phase coupled inductor. The first and second magnetic cores may be formed into shapes that, when coupled together, may form a single scalable magnetic core. For example, the cores can be fashioned into shapes such as a U, an I, an H, a ring, a rectangle, and a comb, that cooperatively form the single magnetic core.
    Type: Application
    Filed: December 21, 2012
    Publication date: May 9, 2013
    Applicant: Volterra Semiconductor Corporation
    Inventor: Volterra Semiconductor Corporation
  • Publication number: 20130106194
    Abstract: An integrated photovoltaic panel has one or more integral DC-DC converter circuits. The DC-DC converter input port couples to a section of at least one photovoltaic (PV) device of the panel separate from PV devices feeding other converters. The converter has an MPPT controller for operating the converter to transfer maximum power from coupled photovoltaic devices to its output port. The PV panel has a transparent substrate to which PV devices are mounted. A laminating material seals PV devices and converters to the substrate. In embodiments, the panel has multiple converters connected with output ports in series. The integrated PV panel provides summed maximum powers of each section of PV devices. In some embodiments the DC-DC converters are complete with inductors, in other embodiments a common inductor is shared by multiple converters of the panel, in a particular embodiment the common inductor is parasitic inductance of the panel.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 2, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: VOLTERRA SEMICONDUCTOR CORPORATION
  • Publication number: 20130093408
    Abstract: An asymmetrical coupled inductor includes a first and a second winding and a core. The core is formed of a magnetic material and magnetically couples together the windings. The core is configured such that a leakage inductance value of the first winding is greater than a leakage inductance value of the second winding. The coupled inductor is included, for example, in a multi-phase DC-to-DC converter. A DC-to-DC converter including a symmetrical coupled inductor includes at least one additional inductor electrically coupled in series with one or more of the coupled inductor's windings. A controller for a DC-to-DC converter including a first phase having an effective inductance value greater than an effective inductance value of a second phase is configured to shut down the second phase while the first phase remains operational during a light load operating condition.
    Type: Application
    Filed: December 10, 2012
    Publication date: April 18, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: VOLTERRA SEMICONDUCTOR CORPORATION
  • Publication number: 20130087366
    Abstract: Various applications of interconnect substrates in power management systems are described.
    Type: Application
    Filed: October 4, 2012
    Publication date: April 11, 2013
    Applicant: VOLTERRA SEMICONDUCTOR CORPORATION
    Inventor: Volterra Semiconductor Corporation