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公开(公告)号：US20220155808A1
公开(公告)日：2022-05-19
申请号：US16953257
申请日：2020-11-19
Applicant: Apple Inc.
Inventor： Sujan K. Manohar , Jay B. Fletcher
Abstract: A dropout detection circuit for an LDO voltage regulator is disclosed. An LDO voltage regulator includes a power transistor having a drain terminal coupled to an output voltage node and a gate terminal coupled to an output of an error amplifier. A source terminal of the power transistor is coupled to an input voltage node. The circuit further includes a detection circuit having a first input coupled to the gate terminal and a second input coupled to the drain terminal. The detection circuit is configured to generate an indication responsive to detecting that the LDO voltage regulator has entered operation below a minimum dropout.
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公开(公告)号：US20200026345A1
公开(公告)日：2020-01-23
申请号：US16039842
申请日：2018-07-19
Applicant: Apple Inc.
Inventor： Jay B. Fletcher , Karthik Manickam , Bo Yang , Vincent R. von Kaenel , Shawn Searles , Hubert Attah , Nir Dahan , Olivier Girard
Abstract: A voltage regulator circuit included in a computer system may generate a voltage level on a power supply signal using a source power supply signal and based initial values of one or more operation parameters derived from wafer-level test data. One or more operation characteristics of the voltage regulator circuit may be sampled, by a measurement circuit, at multiple time points to generated measurement data. A control circuit may adapt operation of the voltage regulator circuit based on the measurement data.
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公开(公告)号：US20190190252A1
公开(公告)日：2019-06-20
申请号：US15849222
申请日：2017-12-20
Applicant: Apple Inc.
Inventor： Nathan F. Hanagami , Jay B. Fletcher
IPC: H02H3/18 , H02H9/02 , H03K17/0812 , G05F1/575
CPC classification number: H02H3/18 , G05F1/575 , H02H9/02 , H03K17/08122
Abstract: A circuit and method for protecting from reverse current is disclosed. A reverse current protection circuit is coupled to a pass transistor of power circuitry (e.g., a power switch or voltage regulator), the pass transistor being coupled between first and second voltage nodes, the first voltage node being coupled to a power supply circuit. The reverse current protection circuit includes a sensing circuit that is configured to sense an amount of reverse current flowing through the pass transistor (from the second voltage node to the first voltage node). Responsive to the amount of reverse current exceeding a threshold value, the reverse current sensing circuit activates a shunt circuit, which redirects at least some of the reverse current to a reference node (e.g., ground).
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公开(公告)号：US10234883B1
公开(公告)日：2019-03-19
申请号：US15844765
申请日：2017-12-18
Applicant: Apple Inc.
Inventor： Dingkun Du , Jay B. Fletcher
Abstract: A voltage regulator circuit is disclosed. In one embodiment, a low drop-out (LDO) voltage regulator includes a voltage loop and a current loop. The current loop includes a source follower coupled to an output node of the LDO voltage regulator, the source follower being implemented with a PMOS transistor. The current loop also includes a current mirror coupled between a first branch of the current loop and a second branch of the current loop. The source follower is implemented in the second branch of the current loop. The voltage loop includes an amplifier circuit having an inverting input coupled to the output node, and a non-inverting input coupled to receive a reference voltage. The output of the amplifier is coupled to the gate terminal of the PMOS transistor of the current mirror.
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25.发明申请公开(公告)号：US20170090501A1
公开(公告)日：2017-03-30
申请号：US14870661
申请日：2015-09-30
Applicant: Apple Inc.
Inventor： Jay B. Fletcher , Shawn Searles , Fabio Gozzini , Sanjay Pant
IPC: G05F3/08
Abstract: A system that includes a regulator unit is disclosed. The regulator unit includes first and second phase units whose outputs are coupled to a common output node. Each of the phase units may be configured to source current to the output node in response to the assertion of a respective clock signal in order to generate a regulated supply voltage. Each phase unit includes a respective transconductance amplifier configured to generate a respective demand current dependent upon a reference voltage and the regulated supply voltage.
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Patent Agency Ranking
公开(公告)号：US09306457B2
公开(公告)日：2016-04-05
申请号：US14096868
申请日：2013-12-04
Applicant: Apple Inc.
Inventor： Shawn Searles , Jay B. Fletcher
Abstract: A method and apparatus for monitoring instantaneous load current is disclosed. In one embodiment, an integrated circuit includes a voltage regulator and at least one functional unit implemented thereon. The voltage regulator includes a supply circuit configured to provide a voltage to the functional unit, and a sense circuit configured to determine an amount of current provided to the functional unit by the supply circuit. The sense circuit may determine the instantaneous load current being provided to the functional unit. An indication circuit is configured to provide, to the functional unit, an indication of the amount of current supplied thereto by the supply circuit.
Abstract translation: 公开了一种用于监测瞬时负载电流的方法和装置。 在一个实施例中，集成电路包括电压调节器和在其上实现的至少一个功能单元。 电压调节器包括被配置为向功能单元提供电压的供电电路，以及被配置为通过供电电路确定提供给功能单元的电流量的感测电路。 感测电路可以确定提供给功能单元的瞬时负载电流。 指示电路被配置为向功能单元提供由供应电路提供给其的电流量的指示。
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公开(公告)号：US20240313646A1
公开(公告)日：2024-09-19
申请号：US18618171
申请日：2024-03-27
Applicant: Apple Inc.
Inventor： Hao Zhou , Sarfraz Shaikh , Jay B. Fletcher , Sanjay Pant , Mark A. Yoshimoto , Vincenzo Bisogno , Shawn Searles
Abstract: A power management circuit included in a computer system regulates a voltage level of a power supply node used by other circuits in the computer system. The power management circuit includes a control circuit and multiple phase circuits coupled to the regulated power supply node via corresponding inductors. The control circuit selectively activates particular ones of the multiple phase circuits allowing them source respective currents to the regulated power supply node. The control circuit also selectively activates particular ones of other phase circuits that are external to the power management circuit and coupled to the regulated power supply node via their own corresponding inductors. Once activated, the external phase circuits source respective currents to the regulated power supply node via their corresponding inductors.
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公开(公告)号：US20230400869A1
公开(公告)日：2023-12-14
申请号：US17806908
申请日：2022-06-14
Applicant: Apple Inc.
Inventor： Michael P. Wigley , Tiago Filipe Galhoz Patrao , Mircea-Andrei Lazar , Nathan F. Hanagami , Jay B. Fletcher , Enrico Zanetti
CPC classification number: G05F1/575 , H02M1/0009 , H02M3/158 , G05F1/565 , G05F1/468
Abstract: A regulator circuit included in a computer system may include a control circuit and multiple pass circuits that source respective supply currents to a regulated power supply node by adjusting respective conductance values between an input power supply node and the regulated power supply node. The number of pass circuits can be adjusted on a design-by-design basis based on a threshold load current for the regulator circuit or on a threshold conductance between the input power supply node and the regulated power supply node. The control circuit adjusts the respective conductance values using a combination of respective sense currents generated by the multiple pass circuits along with a reference voltage and a voltage level of the regulated power supply node.
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公开(公告)号：US20230369972A1
公开(公告)日：2023-11-16
申请号：US18317679
申请日：2023-05-15
Applicant: Apple Inc.
Inventor： Hao Zhou , Sarfraz Shaikh , Jay B. Fletcher , Sanjay Pant , Mark A. Yoshimoto , Vincenzo Bisogno , Shawn Searles
Abstract: A power management circuit included in a computer system regulates a voltage level of a power supply node used by other circuits in the computer system. The power management circuit includes a control circuit and multiple phase circuits coupled to the regulated power supply node via corresponding inductors. The control circuit selectively activates particular ones of the multiple phase circuits allowing them source respective currents to the regulated power supply node. The control circuit also selectively activates particular ones of other phase circuits that are external to the power management circuit and coupled to the regulated power supply node via their own corresponding inductors. Once activated, the external phase circuits source respective currents to the regulated power supply node via their corresponding inductors.
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公开(公告)号：US20220107680A1
公开(公告)日：2022-04-07
申请号：US17499723
申请日：2021-10-12
Applicant: Apple Inc.
Inventor： Jay B. Fletcher , Karthik Manickam , Bo Yang , Vincent R. von Kaenel , Shawn Searles , Hubert Attah , Nir Dahan , Olivier Girard
IPC: G06F1/3296 , G01R31/28 , G06F1/3206
Abstract: A voltage regulator circuit included in a computer system may generate a voltage level on a power supply signal using a source power supply signal and based initial values of one or more operation parameters derived from wafer-level test data. One or more operation characteristics of the voltage regulator circuit may be sampled, by a measurement circuit, at multiple time points to generated measurement data. A control circuit may adapt operation of the voltage regulator circuit based on the measurement data.
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