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Volterra Semiconductor Corporation Patents
Assignee:
Volterra Semiconductor Corporation
Address:
Fremont, CA
No. of patents:
89
Patents:


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Patent Number Title Of Patent Date Issued
8574973 Method of fabricating a lateral double-diffused MOSFET (LDMOS) transistor and a conventional CMO November 5, 2013
An integrated circuit structure having an LDMOS transistor and a CMOS transistor includes a p-type substrate having a surface, an n-well implanted in the substrate, the first n-well providing a CMOS n-well, a CMOS transistor including a CMOS source with a first p+ region implanted in
8299885 Method for making magnetic components with M-phase coupling, and related inductor structures October 30, 2012
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
8299882 Low profile inductors for high density circuit boards October 30, 2012
An inductor includes a core formed of a magnetic material and a foil winding wound at least partially around or through at least a portion of the core. A first end of the winding extends away from the core to form an extended output tongue configured and arranged to supplement or serve
8294544 Method for making magnetic components with M-phase coupling, and related inductor structures October 23, 2012
An M-phase coupled inductor including a magnetic core and M windings, where M is an integer greater than one. The magnetic core is formed of a core material, and the magnetic core includes a first outer leg forming a first gap. The first gap includes a first gap material having lower
8283902 Error amplification for current mode control switching regulation October 9, 2012
A voltage regulator has a switch configured to alternately couple and decouple a voltage source through an inductor to a load, feedback circuitry to generate a feedback current, a current sensor configured to measure the feedback current, and a controller configured to receive the fe
8253420 Integrated electrical circuit and test to determine the integrity of a silicon die August 28, 2012
A detection circuit and one or more wires or circuit traces are included in a die. The combination is used to detect mechanical failure of the substrate, e.g. silicon after singulation of the dice from the wafer. Failures may be detected at different regions or planes within the die,
8237530 Coupled inductor with improved leakage inductance control August 7, 2012
An M-winding coupled inductor includes a first end magnetic element, a second end magnetic element, M connecting magnetic elements, and M windings. M is an integer greater than one. Each connecting magnetic element is disposed between and connects the first and second end magnetic el
8233306 Memory program circuit July 31, 2012
Methods, systems, and apparatus, including computer program products for programming memory. In one aspect, a program circuit includes a first transistive element; a second transistive element coupled to a first end of the first transistive element; a burn subcircuit, the burn subcircuit
8174348 Two-phase coupled inductors which promote improved printed circuit board layout May 8, 2012
Two-phase coupled inductors including a magnetic core, at least a first winding, and at least three solder tabs. Power supplies including a printed circuit board, a two-phase coupled inductor affixed to the printed circuit board, and first and second switching circuits affixed to the
8169081 Conductive routings in integrated circuits using under bump metallization May 1, 2012
An integrated circuit structure includes a first conductive layer and an under bump metallization layer over the first conductive layer. The first conductive layer has a first conductive region and a second conductive region electrically isolated from the first conductive region. The und
8120342 Current report in current mode switching regulation February 21, 2012
A voltage regulator includes a switch configured to alternately couple and decouple a voltage source through a inductor to a load, a feedback circuitry configured to generate a feedback current proportional to a difference between a desired voltage and an output voltage at an output
8106516 Wafer-level chip scale package January 31, 2012
A chip scale package implements solder bars to form a connection between a chip and a trace, formed in a substrate, such as another chip or PCB. Solder bars are formed by depositing one or more solder layers into the socket, or optionally, depositing a base metal layer into the socket an
8102233 Coupled inductor with improved leakage inductance control January 24, 2012
An M-winding coupled inductor includes a first end magnetic element, a second end magnetic element, M connecting magnetic elements, and M windings. M is an integer greater than one. Each connecting magnetic element is disposed between and connects the first and second end magnetic el
8085553 Lead assembly for a flip-chip power switch December 27, 2011
A power switch assembly includes a flip-chip type integrated circuit chip and a lead-frame with a plurality of spaced apart parallel lead sections. The flip-chip type integrated circuit chip includes a distributed transistor, and first and second pluralities of flip-chip interconnects
8071436 Method of fabricating a semiconductor device having a lateral double diffused MOSFET transistor December 6, 2011
Methods and systems for monolithically fabricating a lateral double-diffused MOSFET (LDMOS) transistor having a source, drain, and a gate on a substrate, with a process flow that is compatible with a CMOS process flow are described. In some implementations, a method of fabricating a
8068355 Apparatus for isolated switching power supply with coupled output inductors November 29, 2011
A multiphase DC-to-DC power converter has two or more sets of input switches, each set of input switches driving primary windings of at least one associated transformer. Each transformer has one or two secondary windings, the secondary windings feeding power through output switches or
8044648 Start mode in switching regulation October 25, 2011
A voltage regulator is operated by, during a finite period of a voltage regular start mode having a plurality of current pulses, monotonically increasing the maximum current of the current pulses and a target voltage.
8040212 Low profile inductors for high density circuit boards October 18, 2011
An inductor includes a core formed of a magnetic material and a foil winding wound at least partially around or through at least a portion of the core. A first end of the winding extends away from the core to form an extended output tongue configured and arranged to supplement or serve
8018208 Error amplification for current mode control switching regulation September 13, 2011
A voltage regulator has a switch configured to alternately couple and decouple a voltage source through an inductor to a load, feedback circuitry to generate a feedback current, a current sensor configured to measure the feedback current, and a controller configured to receive the fe
8014180 Voltage regulator with inductor banks September 6, 2011
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7999318 Heavily doped region in double-diffused source MOSFET (LDMOS) transistor and a method of fabrica August 16, 2011
A transistor includes a source, a drain and a gate. The source includes a p-doped p-body, a p+ region overlapping the p-body, an n+ region overlapping the p-body in proximity to the p+ region, and an n-doped source, heavily double-diffused (SHDD) region, only into the source region o
7994888 Multi-turn inductors August 9, 2011
A multi-winding inductor includes a first foil winding and a second foil winding. One end of the first foil winding extends from a first side of the core and wraps under the core to form a solder tab under the core. One end of the second foil winding extends from a second side of the cor
7989953 Flip chip power switch with under bump metallization stack August 2, 2011
A semiconductor package includes a semiconductor substrate a semiconductor substrate having source and drain regions formed therein, an intermediate routing structure to provide electrical interconnects to the source and drain regions, a dielectric layer formed over the intermediate
7981739 Method of fabricating a lateral double-diffused MOSFET (LDMOS) transistor and a conventional CMO July 19, 2011
A method of fabricating an LDMOS transistor and a conventional CMOS transistor together on a substrate. A P-body is implanted into a source region of the LDMOS transistor. A gate oxide for the conventional CMOS transistor is formed after implanting the P-body into the source region o
7965165 Method for making magnetic components with M-phase coupling, and related inductor structures June 21, 2011
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
7898379 Method for making magnetic components with N-phase coupling, and related inductor structures March 1, 2011
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
7893806 Method for making magnetic components with N-phase coupling, and related inductor structures February 22, 2011
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
7888222 Method of fabricating a lateral double-diffused MOSFET February 15, 2011
A method of monolithically fabricating an LDMOS transistor with a fabrication process that is compatible with a sub-micron CMOS fabrication process. The specification further describes an LDMOS transistor. The LDMOS transistor is implemented in a first impurity region on a substrate.
7868378 Methods and apparatus for LDMOS transistors January 11, 2011
An LDMOS transistor includes a gate including a conductive material over an insulator material, a source including a first impurity region and a second impurity region, a third impurity region, and a drain including a fourth impurity region and a fifth impurity region. The first impurity
7864016 Method for making magnetic components with N-phase coupling, and related inductor structures January 4, 2011
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
7859238 Method and apparatus for multi-phase DC-DC converters using coupled inductors in discontinuous c December 28, 2010
A multi-phase, coupled-inductor, DC-DC voltage converter operates in discontinuous conduction mode (DCM) when the system is operated at low output power demand. An embodiment of the converter switches to operating in continuous conduction mode (CCM) when the system is operated at high
7830688 Voltage regulator with adaptation control November 9, 2010
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7825643 Voltage regulator with communication ring scheme November 2, 2010
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7795850 Analog current command and settable slopes in voltage regulator September 14, 2010
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7772955 Method for making magnetic components with N-phase coupling, and related inductor structures August 10, 2010
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
7746209 Method for making magnetic components with N-phase coupling, and related inductor structures June 29, 2010
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
7688607 Voltage regulator with inductor banks March 30, 2010
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7671411 Lateral double-diffused MOSFET transistor with a lightly doped source March 2, 2010
Methods and systems for monolithically fabricating a lateral double-diffused MOSFET (LDMOS) transistor having a source, drain, and a gate on a substrate, with a process flow that is compatible with a CMOS process flow are described.
7666731 Method of fabricating a lateral double-diffused MOSFET (LDMOS) transistor and a conventional CMO February 23, 2010
A method of fabricating an LDMOS transistor and a conventional CMOS transistor together on a substrate. A P-body is implanted into a source region of the LDMOS transistor. A gate oxide for the conventional CMOS transistor is formed after implanting the P-body into the source region o
7616463 Voltage regulator with common s-phase signals and phase lock loops November 10, 2009
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7615822 Diffused drain transistor November 10, 2009
A transistor has a source that includes a first impurity region with a first volume and a first surface area on a surface of the transistor. The transistor also has a drain that includes a second impurity region with a second volume and a second surface area on a surface of the transisto
7548046 Method and apparatus for multi-phase DC-DC converters using coupled inductors in discontinuous c June 16, 2009
A multi-phase, coupled-inductor, DC-DC voltage converter operates in discontinuous conduction mode (DCM) when the system is operated at low output power demand. An embodiment of the converter switches to operating in continuous conduction mode (CCM) when the system is operated at high
7525408 Method for making magnetic components with N-phase coupling, and related inductor structures April 28, 2009
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
7522436 Master-slave with adaptation control including slave current checking April 21, 2009
A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes
7498920 Method for making magnetic components with N-phase coupling, and related inductor structures March 3, 2009
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
7465621 Method of fabricating a switching regulator with a high-side p-type device December 16, 2008
A first impurity region of a first type is implanted to have a first surface area on a substrate. A second impurity region of an opposite second type is implanted into a drain region of the transistor to have a second surface area in the first surface area of the first impurity regio
7463498 Apparatus for isolated switching power supply with coupled output inductors December 9, 2008
A multiphase DC-to-DC power converter has two or more sets of input switches, each set of input switches driving primary windings of an associated transformer. Each transformer has one or two secondary windings, the secondary windings feeding power through output switches or rectifie
7405443 Dual gate lateral double-diffused MOSFET (LDMOS) transistor July 29, 2008
Method and apparatus for providing a lateral double-diffused MOSFET (LDMOS) transistor having a dual gate. The dual gate includes a first gate and a second gate. The first gate includes a first oxide layer formed over a substrate, and the second gate includes a second oxide layer for
7405117 Method of fabricating a lateral double-diffused MOSFET (LDMOS) transistor July 29, 2008
A method of monolithically fabricating a lateral double-diffused MOSFET (LDMOS) transistor having a source, drain, and a gate on a substrate, with a process flow that is compatible with a CMOS process flow, is disclosed.
7352269 Method for making magnetic components with N-phase coupling, and related inductor structures April 1, 2008
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
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