Abstract: A design technique is disclosed that divides up a cellular power switch into different size segments. Each segment is driven by a different driver circuit. The selection of the combination of segments is made to minimize the combined conduction and switching losses of the power switch. For example, for very light loads, switching losses dominate so only a small segment is activated for driving the load. For medium and high load currents, conduction losses become more significant, so additional segments are activated to minimize the total losses. In one embodiment, the number of cells in the segments is binary weighted, such as 1×, 2×, and 4×, so that there are seven different combinations of segments. The drivers may be configured to achieve the same or different slew rates of the segments, such as to reduce transients. The segments may all be in the same die or a plurality of dies.

Abstract: A design technique is disclosed that divides up a cellular power switch into different size segments. Each segment is driven by a different driver circuit. The selection of the combination of segments is made to minimize the combined conduction and switching losses of the power switch. For example, for very light loads, switching losses dominate so only a small segment is activated for driving the load. For medium and high load currents, conduction losses become more significant, so additional segments are activated to minimize the total losses. In one embodiment, the number of cells in the segments is binary weighted, such as 1×, 2×, and 4×, so that there are seven different combinations of segments. The drivers may be configured to achieve the same or different slew rates of the segments, such as to reduce transients. The segments may all be in the same die or a plurality of dies.

Abstract: A power device is divided into an active area, an active area perimeter, and a termination region. An array of insulated gates formed in trenches form cells in a p-well body, where n+ source regions are formed in the top surface of the silicon wafer and surround the tops of the trenches. A top cathode electrode contacts the source regions, and an anode electrode is on the bottom of the die. A sufficiently high reverse voltage causes a breakdown current to flow between the anode and cathode electrodes. To ensure that a reverse breakdown voltage current occurs away from the gate oxide and/or the termination region, the active area and the active area perimeter of the p-well are additionally doped with p-type dopants to form deep p+ regions in selected areas that extend below the trenches. The deep p+ regions channel the breakdown current away from active cells and the termination region.

Abstract: A programmable analog tile integrated circuit is configured over a standardized bus by communicating tile configuration information from a first integrated circuit tile, through a second integrated circuit tile, to a third integrated circuit tile. Each of the three integrated circuit tiles is part of an integrated circuit. The standardized bus is formed when the tiles are placed adjacent one another. Data bus and control signal conductors of the adjacent tiles line up and interconnect such that each signal conductor is electrically connected to every tile. Tile configuration information may be written to a selected register identified by an address in any selected one of the tiles using the data bus and control lines, regardless of the relative physical locations of the tile sending and the tile receiving the information. Thus, tile configuration information may pass from one tile to another tile, through any number of intermediate tiles.

Abstract: A programmable analog tile integrated circuit is configured over a standardized bus by communicating tile configuration information from a first integrated circuit tile, through a second integrated circuit tile, to a third integrated circuit tile. Each of the three integrated circuit tiles is part of an integrated circuit. The standardized bus is formed when the tiles are placed adjacent one another. Data bus and control signal conductors of the adjacent tiles line up and interconnect such that each signal conductor is electrically connected to every tile. Tile configuration information may be written to a selected register identified by an address in any selected one of the tiles using the data bus and control lines, regardless of the relative physical locations of the tile sending and the tile receiving the information. Thus, tile configuration information may pass from one tile to another tile, through any number of intermediate tiles.

Abstract: A programmable analog tile integrated circuit is configured over a standardized bus by communicating tile configuration information from a first integrated circuit tile, through a second integrated circuit tile, to a third integrated circuit tile. Each of the three integrated circuit tiles is part of an integrated circuit. The standardized bus is formed when the tiles are placed adjacent one another. Data bus and control signal conductors of the adjacent tiles line up and interconnect such that each signal conductor is electrically connected to every tile. Tile configuration information may be written to a selected register identified by an address in any selected one of the tiles using the data bus and control lines, regardless of the relative physical locations of the tile sending and the tile receiving the information. Thus, tile configuration information may pass from one tile to another tile, through any number of intermediate tiles.

Abstract: A programmable analog tile integrated circuit configuration tool communicates a power management control characteristic query soliciting control requirement information for a novel Power Management Integrated Circuit (PMIC) tile in a Multi-Tile Power Management Integrated Circuit (MTPMIC). The configuration tool receives a user response to the query indicating control requirements across a network. The PMIC tile includes configuration registers. Configuration information bit values stored in the configuration registers control the operational characteristics of the functional circuitry of the tile. The configuration registers of each novel PMIC tile are accessible at pre-defined addresses on a standardized bus of the MTPMIC. In response to the user response, the configuration tool generates appropriate tile configuration information for loading the configuration registers such that the PMIC tile within the MTPMIC is programmed to satisfy the user's control requirements.

Abstract: A programmable analog tile integrated circuit placement tool allows a user to manipulate a graphical representation of a first power management integrated circuit (PMIC) tile with respect to a graphical representation of a second PMIC tile in a proposed Multi-Tile Power Management Integrated Circuit (MTPMIC). The novel PMIC tiles have pre-defined physical structures including a bus portion and a memory structure for storing configuration information for configuring the tile. When appropriately placed in a MTPMIC, the bus portions of the selected tiles automatically form a standardized bus that accommodates all signal communication required for a functioning MTPMIC. A remote user with minimal training in analog circuit design may command the placement of individual tiles in a proposed MTPMIC layout. Upon receiving a user response indicating satisfaction with the placement of PMIC tiles, the tool quickly and automatically generates physical layout data suitable for fabrication of the MTPMIC.

Abstract: An Analog Tile Selection, Placement, Configuration and Programming (ATSPCP) tool communicates a power management characteristic query over a network. The query is displayed to a user on a webpage. The query is a solicitation for desired characteristics of a Power Management Integrated Circuit (PMIC). After receiving user requirements in a response to the query, the tool selects a number of power management integrated circuit tiles having pre-defined physical structures. The pre-defined structure of each tile includes a bus portion and a memory structure for storing configuring information for the tile. When combined in a Multi-Tile Power Management Integrated Circuit (MTPMIC), the bus portions of the selected tiles automatically form a standardized bus that accommodates all signal communication required for a functioning MTPMIC that meets the user requirements. The ATSPCP tool combines the physical layout data of each selected PMIC tile to form composite physical layout data for the overall MTPMIC.

Abstract: A single terminal is used to configure an integrated circuit into one of three states. A circuit within the integrated circuit is coupled to the terminal and determines whether the terminal: 1) is coupled by a low impedance to a voltage source, or 2) is coupled by a medium impedance to the voltage source, or 3) is floating or substantially floating. The circuit asserts a first digital logic signal when the circuit determines that the terminal is coupled by the low impedance to the voltage source. The circuit asserts a second digital logic signal when the circuit determines that the terminal is coupled by the medium impedance to the voltage source. The circuit asserts a third digital logic signal when the circuit determines that the terminal is floating or substantially floating. The terminal and circuit are particular suited for use in a Power Management Unit (PMU) Integrated Circuit.

Abstract: A method involves detecting an inrush current that flows out of a USB port of a first electronic device when a central processing unit (CPU) of the first electronic device is not being powered. The inrush current is detected by a novel inrush current detect circuit when a second electronic device is connected to the USB port. In one example, the first electronic device is a laptop computer having a battery and a USB DC-to-DC converter. The inrush current detect circuit enables the USB DC-to-DC converter such that the USB DC-to-DC converter receives power from the battery and supplies a regulated voltage to the second electronic device through the USB port while the CPU remains unpowered (not drawing power from the battery).

Abstract: A programmable analog tile integrated circuit programming tool communicates a power management control characteristic query soliciting control requirement information for a novel power management integrated circuit (PMIC) tile in a multi-tile power management integrated circuit (MTPMIC). The programming tool receives a user response to the query indicating control requirements across a network. The novel PMIC tiles have a pre-defined physical structure including all memory structures required for configuration of each tile and a bus portion. When combined in a multi-tile power management integrated circuit (MTPMIC), the bus portions of the selected tiles automatically form a standardized bus that accommodates all signal communication required for a functioning MTPMIC. The memory structure of each tile is individually addressable via the standardized bus. Thus, in response to control requirements, the programming tool programs a PMIC tile that is part of a MTPMIC to meet the control requirements.

Abstract: A programmable analog tile integrated circuit programming tool communicates a power management control characteristic query soliciting control requirement information for a novel power management integrated circuit (PMIC) tile in a multi-tile power management integrated circuit (MTPMIC). The programming tool receives a user response to the query indicating control requirements across a network. The novel PMIC tiles have a pre-defined physical structure including all memory structures required for configuration of each tile and a bus portion. When combined in a multi-tile power management integrated circuit (MTPMIC), the bus portions of the selected tiles automatically form a standardized bus that accommodates all signal communication required for a functioning MTPMIC. The memory structure of each tile is individually addressable via the standardized bus. Thus, in response to control requirements, the programming tool programs a PMIC tile that is part of a MTPMIC to meet the control requirements.

Abstract: A programmable analog tile integrated circuit configuration tool communicates a power management control characteristic query soliciting control requirement information for a novel Power Management Integrated Circuit (PMIC) tile in a Multi-Tile Power Management Integrated Circuit (MTPMIC). The configuration tool receives a user response to the query indicating control requirements across a network. The PMIC tile includes configuration registers. Configuration information bit values stored in the configuration registers control the operational characteristics of the functional circuitry of the tile. The configuration registers of each novel PMIC tile are accessible at pre-defined addresses on a standardized bus of the MTPMIC. In response to the user response, the configuration tool generates appropriate tile configuration information for loading the configuration registers such that the PMIC tile within the MTPMIC is programmed to satisfy the user's control requirements.

Abstract: A programmable analog tile integrated circuit placement tool allows a user to manipulate a graphical representation of a first power management integrated circuit (PMIC) tile with respect to a graphical representation of a second PMIC tile in a proposed Multi-Tile Power Management Integrated Circuit (MTPMIC). The novel PMIC tiles have pre-defined physical structures including a bus portion and a memory structure for storing configuration information for configuring the tile. When appropriately placed in a MTPMIC, the bus portions of the selected tiles automatically form a standardized bus that accommodates all signal communication required for a functioning MTPMIC. A remote user with minimal training in analog circuit design may command the placement of individual tiles in a proposed MTPMIC layout. Upon receiving a user response indicating satisfaction with the placement of PMIC tiles, the tool quickly and automatically generates physical layout data suitable for fabrication of the MTPMIC.

Abstract: An Analog Tile Selection, Placement, Configuration and Programming (ATSPCP) tool communicates a power management characteristic query over a network. The query is displayed to a user on a webpage. The query is a solicitation for desired characteristics of a Power Management Integrated Circuit (PMIC). After receiving user requirements in a response to the query, the tool selects a number of power management integrated circuit tiles having pre-defined physical structures. The pre-defined structure of each tile includes a bus portion and a memory structure for storing configuring information for the tile. When combined in a Multi-Tile Power Management Integrated Circuit (MTPMIC), the bus portions of the selected tiles automatically form a standardized bus that accommodates all signal communication required for a functioning MTPMIC that meets the user requirements. The ATSPCP tool combines the physical layout data of each selected PMIC tile to form composite physical layout data for the overall MTPMIC.

Abstract: A programmable analog tile integrated circuit is configured over a standardized bus by communicating tile configuration information from a first integrated circuit tile, through a second integrated circuit tile, to a third integrated circuit tile. Each of the three integrated circuit tiles is part of an integrated circuit. The standardized bus is formed when the tiles are placed adjacent one another. Data bus and control signal conductors of the adjacent tiles line up and interconnect such that each signal conductor is electrically connected to every tile. Tile configuration information may be written to a selected register identified by an address in any selected one of the tiles using the data bus and control lines, regardless of the relative physical locations of the tile sending and the tile receiving the information. Thus, tile configuration information may pass from one tile to another tile, through any number of intermediate tiles.

Abstract: A single terminal is usable to configure an integrated circuit into one of three states. A circuit within the integrated circuit is coupled to the terminal and determines whether the terminal: 1) is tied low by an external connection, or 2) is tied high by an external connection, or 3) is floating or is substantially floating. If the circuit determines that the terminal is floating or is substantially floating, then the circuit sets an operational characteristic of a portion of the circuit (for example, sets a maximum current with which the circuit charges a battery) to have a value that is a function of a resistance of an external resistor coupled to the terminal. If no external resistor is present, then the terminal is floating and the operational characteristic is set to have a zero value. The terminal and circuit are particularly suited to use in a USB battery charger.

Abstract: A single terminal is used to configure an integrated circuit into one of three states. A circuit within the integrated circuit is coupled to the terminal and determines whether the terminal: 1) is coupled by a low impedance to a voltage source, or 2) is coupled by a medium impedance to the voltage source, or 3) is floating or substantially floating. The circuit asserts a first digital logic signal when the circuit determines that the terminal is coupled by the low impedance to the voltage source. The circuit asserts a second digital logic signal when the circuit determines that the terminal is coupled by the medium impedance to the voltage source. The circuit asserts a third digital logic signal when the circuit determines that the terminal is floating or substantially floating. The terminal and circuit are particular suited for use in a Power Management Unit (PMU) Integrated Circuit.

Abstract: A method involves detecting an inrush current that flows out of a USB port of a first electronic device when a central processing unit (CPU) of the first electronic device is not being powered. The inrush current is detected by a novel inrush current detect circuit when a second electronic device is connected to the USB port. In one example, the first electronic device is a laptop computer having a battery and a USB DC-to-DC converter. The inrush current detect circuit enables the USB DC-to-DC converter such that the USB DC-to-DC converter receives power from the battery and supplies a regulated voltage to the second electronic device through the USB port while the CPU remains unpowered (not drawing power from the battery).