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1. 发明授权

US11303208B2 Cycle transitions for buck converter circuits 有权
公开(公告)号：US11303208B2
公开(公告)日：2022-04-12
申请号：US16290769
申请日：2019-03-01
申请人： Apple Inc.
发明人： Dingkun Du , Michael B. Nussbaum , Jitendra K. Agrawal , Floyd L. Dankert , Jay B. Fletcher
IPC分类号： G06F1/28 , H02M3/158 , G06F1/3296
摘要： 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.

2. 发明申请

US20210089068A1 Dual Loop LDO Voltage Regulator 有权
公开(公告)号：US20210089068A1
公开(公告)日：2021-03-25
申请号：US16583008
申请日：2019-09-25
申请人： Apple Inc.
发明人： Sujan K. Manohar , Jay B. Fletcher , Nathan F. Hanagami
IPC分类号： G05F1/575 , G05F1/59
摘要： A dual loop LDO voltage regulator is disclosed. The voltage regulator circuit includes a first current mirror having first and second transistors having source terminals coupled to an input voltage node. The circuit further includes a second current mirror having third and fourth transistors, wherein drain terminals of the third and fourth transistors are coupled to drain terminals of the first and second transistors, respectively. A feedback circuit is coupled between source terminals of the third and fourth transistors, and is configured to generate a feedback signal based on a reference voltage and an output voltage present on the source terminal of the fourth transistor. The first and second current mirrors form a first control loop, and wherein the first and second current mirrors and the feedback circuit form a second control loop.

3. 发明申请

US20150155780A1 Instantaneous Load Current Monitoring 有权
标题翻译：瞬时负载电流监测
公开(公告)号：US20150155780A1
公开(公告)日：2015-06-04
申请号：US14096868
申请日：2013-12-04
申请人： Apple Inc.
发明人： Shawn Searles , Jay B. Fletcher
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , G05F1/46
摘要： 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.
摘要翻译：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。

4. 发明申请

US20220399810A1 Multi-Phase Power Converter with External Phase Circuits 有权
公开(公告)号：US20220399810A1
公开(公告)日：2022-12-15
申请号：US17343459
申请日：2021-06-09
申请人： Apple Inc.
发明人： Hao Zhou , Sarfraz Shaikh , Jay B. Fletcher , Sanjay Pant , Mark A. Yoshimoto , Vincenzo Bisogno , Shawn Searles
IPC分类号： H02M3/155 , H02M1/08 , G06F1/26
摘要： 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.

5. 发明申请

US20220103074A1 Pulse Frequency Modulation Control Methods for Multi-Phase Power Converters with Coupled Inductors 有权
公开(公告)号：US20220103074A1
公开(公告)日：2022-03-31
申请号：US17482215
申请日：2021-09-22
申请人： Apple Inc.
发明人： Chongli Cai , Hao Zhou , Jay B. Fletcher
IPC分类号： H02M3/158
摘要： A power converter circuit that includes multiple phase circuits may employ coupled inductors to generate a particular voltage level on a regulated power supply node. Based on a comparison of a voltage level of the regulated power supply node and a reference voltage, the power converter circuit may initiate an active period, during which the phase circuits source respective currents to the regulated power supply node via corresponding coils included in the coupled inductor. After a time period has elapsed following an initiation of the active period, the operation of the phase circuits is adjusted so that the respective currents flowing in the coils of the coupled inductor are out of phase.

6. 发明申请

US20190140539A1 CONSTANT OFF-TIME CONTROL METHOD FOR BUCK CONVERTERS USING COUPLED INDUCTORS 审中-公开
公开(公告)号：US20190140539A1
公开(公告)日：2019-05-09
申请号：US16180782
申请日：2018-11-05
申请人： Apple Inc.
发明人： Sanjay Pant , Fabio Gozzini , Jay B. Fletcher , Shawn Searles
IPC分类号： H02M3/158 , H02M1/08
摘要： A system that includes a regulator unit is disclosed. The regulator unit includes first and second phase units whose outputs are coupled to through first and second coupled inductors, respectively, to a power supply node of a circuit block. The first phase unit may be configured to discharge, for a first period of time, the power supply node through the first inductor in response to determining a sense current is greater than a demand current. The operation of the second phase unit may follow that of the first phase unit after a second period of time has elapsed.

7. 发明授权

US10122275B2 Constant off-time control method for buck converters using coupled inductors 有权
公开(公告)号：US10122275B2
公开(公告)日：2018-11-06
申请号：US15403255
申请日：2017-01-11
申请人： Apple Inc.
发明人： Sanjay Pant , Fabio Gozzini , Jay B. Fletcher , Shawn Searles
IPC分类号： H02M3/158 , H02M1/08 , H02M1/00
摘要： A system that includes a regulator unit is disclosed. The regulator unit includes first and second phase units whose outputs are coupled to through first and second coupled inductors, respectively, to a power supply node of a circuit block. The first phase unit may be configured to discharge, for a first period of time, the power supply node through the first inductor in response to determining a sense current is greater than a demand current. The operation of the second phase unit may follow that of the first phase unit after a second period of time has elapsed.

8. 发明申请

US20230048248A1 Voltage Regulator with Multi-Level, Multi-Phase Buck Architecture 有权
公开(公告)号：US20230048248A1
公开(公告)日：2023-02-16
申请号：US17823027
申请日：2022-08-29
申请人： Apple Inc.
发明人： Jay B. Fletcher
IPC分类号： H02M3/158
摘要： A voltage regulator having a multi-level, multi-phase architecture is disclosed. The circuit includes a two-level buck converter and an N-level buck converter each coupled to an output node, wherein N is an integer value of three or more. During operation, the two-level buck converter provides one of two possible voltages to a first inductor. The N-level buck converter provides, during operation, one of N voltages to a second inductor. The first and second inductors each convert respectively received voltages to currents, which are provided to a common output node. A control circuit controls the activation of transistors in each of the two-level and N-level buck converters in such a manner as to cause the voltage on the output node to be maintained at a desired level.

9. 发明申请

US20220155808A1 Voltage Regulator Dropout Detection 有权
公开(公告)号：US20220155808A1
公开(公告)日：2022-05-19
申请号：US16953257
申请日：2020-11-19
申请人： Apple Inc.
发明人： Sujan K. Manohar , Jay B. Fletcher
IPC分类号： G05F1/565 , G05F1/575
摘要： 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.

10. 发明申请

US20200026345A1 COMPUTER SYSTEM POWER MONITORING 审中-公开
公开(公告)号：US20200026345A1
公开(公告)日：2020-01-23
申请号：US16039842
申请日：2018-07-19
申请人： Apple Inc.
发明人： Jay B. Fletcher , Karthik Manickam , Bo Yang , Vincent R. von Kaenel , Shawn Searles , Hubert Attah , Nir Dahan , Olivier Girard
IPC分类号： G06F1/32 , G01R31/28
摘要： 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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