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公开(公告)号：US20230096741A1
公开(公告)日：2023-03-30
申请号：US17482287
申请日：2021-09-22
Applicant: Apple Inc.
Inventor： Chongli Cai , Dingkun Du , Michael B. Nussbaum
Abstract: A power converter circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. During a first time period, the power converter charges a capacitor, and the couples the capacitor to the switch node during a second time period. During a third time period the power converter couples the switch node to an input power supply node. To maintain constant charge delivered to the load during each time the switch node is coupled to the input power supply node, the duration of the third time period is adjusted based on a voltage level of the input power supply node, a voltage level of the regulated power supply node, a value of the inductor, and the durations of first and second time periods.
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公开(公告)号：US09989981B1
公开(公告)日：2018-06-05
申请号：US15625776
申请日：2017-06-16
Applicant: Apple Inc.
Inventor： Dingkun Du , Jay B. Fletcher
CPC classification number: G05F1/595 , G05F1/461 , G05F1/563 , G05F1/61 , H03F3/16 , H03F2200/69 , H03F2200/72 , H03F2200/75
Abstract: A voltage regulator is disclosed. The voltage regulator is cascaded, including first and second stages. The first stage may be a capacitor-less first stage that includes a source follower implemented with a first PMOS transistor, with the first PMOS transistor receiving a first reference voltage on its respective gate terminal. The first stage is coupled to receive a first voltage from an external voltage supply, and to provide a second voltage to the second stage. The second stage may be directly and exclusively coupled to the first stage, with no capacitor or connection for one coupled to the first stage output. The second stage may provide an output voltage, on an output node, with the output voltage being less than the second voltage.
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公开(公告)号：US11870345B2
公开(公告)日：2024-01-09
申请号：US17482287
申请日：2021-09-22
Applicant: Apple Inc.
Inventor： Chongli Cai , Dingkun Du , Michael B. Nussbaum
CPC classification number: H02M3/158 , G06F1/28 , H02M3/157 , H02M1/0003
Abstract: A power converter circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. During a first time period, the power converter charges a capacitor, and the couples the capacitor to the switch node during a second time period. During a third time period the power converter couples the switch node to an input power supply node. To maintain constant charge delivered to the load during each time the switch node is coupled to the input power supply node, the duration of the third time period is adjusted based on a voltage level of the input power supply node, a voltage level of the regulated power supply node, a value of the inductor, and the durations of first and second time periods.
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公开(公告)号：US20200280256A1
公开(公告)日：2020-09-03
申请号：US16290769
申请日：2019-03-01
Applicant: Apple Inc.
Inventor： Dingkun Du , Michael B. Nussbaum , Jitendra K. Agrawal , Floyd L. Dankert , Jay B. Fletcher
IPC: H02M3/158 , G06F1/28 , G06F1/3296
Abstract: A voltage regulator circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. The voltage regulator circuit may charge a capacitor using an input power supply signal, and couple the capacitor to the switch node using respective subsets of the multiple devices, which are selected based on one or more control signals. A control circuit may generate the one or more control signals based on a particular switching sequence, which is selected based on a ratio of a voltage level of the regulated power supply node and a voltage level input power supply signal.
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公开(公告)号：US20200280257A1
公开(公告)日：2020-09-03
申请号：US16290794
申请日：2019-03-01
Applicant: Apple Inc.
Inventor： Floyd L. Dankert , Jitendra K. Agrawal , Dingkun Du
IPC: H02M3/158 , H02M1/08 , G06F1/3296 , G06F1/28
Abstract: A voltage regulator circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. The voltage regulator circuit may, using different subsets of the multiple devices, charge a capacitor for a first period of time and then couple the switch node to the capacitor for a second period of time. A control circuit may sense, using a common circuit, different characteristics of a current through the inductor during respective operation modes, and adjust the first and second periods of time based on the different characteristics of the current and a current operation mode.
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Patent Agency Ranking
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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公开(公告)号：US20250112541A1
公开(公告)日：2025-04-03
申请号：US18443501
申请日：2024-02-16
Applicant: Apple Inc.
Inventor： Dingkun Du , Balaji Virajpet , Hao Zhou , Hubert Attah , Jitendra K. Agrawal
Abstract: Phase reassignment among power converters is disclosed. Multi-phase power converters of a plurality are arranged such that the various phases of each can be shared. When a given power converter has a high demand current and a phase of another power converter in the same group is currently unused, that phase may be borrowed by the given power converter to meet the demand current. The power converter that borrows a phase from another power converter is designated as the leader, while the borrowed phase is designated as a follower. The regulated supply voltage is determined by the leader power converter, irrespective of the regulated output voltage to be generated by the power converter from which another phase is borrowed.
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公开(公告)号：US11303208B2
公开(公告)日：2022-04-12
申请号：US16290769
申请日：2019-03-01
Applicant: Apple Inc.
Inventor： Dingkun Du , Michael B. Nussbaum , Jitendra K. Agrawal , Floyd L. Dankert , Jay B. Fletcher
IPC: G06F1/28 , H02M3/158 , G06F1/3296
Abstract: A voltage regulator circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. The voltage regulator circuit may charge a capacitor using an input power supply signal, and couple the capacitor to the switch node using respective subsets of the multiple devices, which are selected based on one or more control signals. A control circuit may generate the one or more control signals based on a particular switching sequence, which is selected based on a ratio of a voltage level of the regulated power supply node and a voltage level input power supply signal.
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公开(公告)号：US10972007B2
公开(公告)日：2021-04-06
申请号：US16290794
申请日：2019-03-01
Applicant: Apple Inc.
Inventor： Floyd L. Dankert , Jitendra K. Agrawal , Dingkun Du
IPC: G06F1/32 , H02M3/158 , H02M1/08 , G06F1/28 , G06F1/3296 , H02M1/00 , G06F1/3203
Abstract: A voltage regulator circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. The voltage regulator circuit may, using different subsets of the multiple devices, charge a capacitor for a first period of time and then couple the switch node to the capacitor for a second period of time. A control circuit may sense, using a common circuit, different characteristics of a current through the inductor during respective operation modes, and adjust the first and second periods of time based on the different characteristics of the current and a current operation mode.
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公开(公告)号：US10720837B1
公开(公告)日：2020-07-21
申请号：US16290799
申请日：2019-03-01
Applicant: Apple Inc.
Inventor： Jitendra K. Agrawal , Dingkun Du
Abstract: A voltage regulator circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. The voltage regulator circuit may couple the switch node to a capacitor for different periods of time using respective different subsets of the multiple devices. A control circuit may modify active times of control signals coupled to the multiple devices based on voltage samples of the switch node in order to adjust the durations of the different periods of time.
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