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公开(公告)号：US10826397B2
公开(公告)日：2020-11-03
申请号：US16374929
申请日：2019-04-04
Applicant: Rohm Co., Ltd.
Inventor： Seiji Takenaka , Masashi Nagasato , Tetsuo Tateishi
Abstract: A switching power supply includes: a switching output circuit configured to generate an output voltage from an input voltage by charging a capacitor by turning on and off an output transistor; a control circuit configured to halt the driving of the switching output circuit when charging electric charge to the capacitor per switching event is limited to a lower limit value and the output voltage, or a feedback voltage commensurate therewith, is raised from a predetermined reference voltage; and a lower limit value setting circuit configured to variably control the lower limit value during the driven period of the switching output circuit. For example, the lower limit value setting circuit can increase the lower limit value with increase in the number of times of switching.
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公开(公告)号：US10425030B2
公开(公告)日：2019-09-24
申请号：US15905345
申请日：2018-02-26
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato
IPC: H01L31/072 , H02P27/04 , H03K17/687 , H02M1/34 , H01L23/64 , H05K1/02 , H02M3/158 , H02M7/5387
Abstract: A semiconductor device disclosed in the present specification has a structure that includes: a first terminal that is to be externally connected to a power source line; a second terminal that is to be externally connected to a ground line; a third terminal that is internally connected to the first terminal and to be externally connected to a first terminal of a bypass capacitor; and a fourth terminal that is internally connected to the second terminal and to be externally connected to a second terminal of the bypass capacitor.
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公开(公告)号：US20160309592A1
公开(公告)日：2016-10-20
申请号：US15099905
申请日：2016-04-15
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato
CPC classification number: H05K1/0243 , H05K1/0242 , H05K1/025 , H05K3/4685 , H05K2201/09154 , H05K2201/09609 , H05K2201/09618 , H05K2201/09727 , H05K2201/09736 , H05K2201/10053 , H05K2201/1009 , H05K2201/10704 , H05K2201/10719 , H05K2201/10734
Abstract: A printed wiring board used to suppress parasitic component is provided. The printed wiring board 100 includes a multi-layer substrate 110, and a power line 50 laid on the multi-layer substrate 110 and connected with a power terminal row T11a-T11d of a semiconductor device 10. The power line 50 includes a first wiring pattern 51 formed on a surface of the multi-layer substrate 110, a second wiring pattern 52 formed within the multi-layer substrate 110, and interlayer connections 53x and 53y electrically conducting the first wiring pattern 51 and the second wiring pattern 52 to bypass at least a portion of the power terminal row T11a-T11d.
Abstract translation: 提供了用于抑制寄生成分的印刷线路板。 印刷电路板100包括多层基板110和布置在多层基板110上并与半导体装置10的电源端子排T11a-T11d连接的电力线50.电力线50包括第一布线 形成在多层基板110的表面上的图案51，形成在多层基板110内的第二布线图案52，以及导电第一布线图案51和第二布线图案52旁路的层间连接53x和53y 电力端子排T11a-T11d的至少一部分。
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4.发明授权公开(公告)号：US11664775B2
公开(公告)日：2023-05-30
申请号：US17725860
申请日：2022-04-21
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato , Seiji Takenaka , Tetsuo Tateishi
CPC classification number: H03F3/45475 , H02M3/158 , H03F1/523 , H03F3/2171 , H03F2200/351 , H03F2203/45726
Abstract: This switching power source 100 has: a switching output circuit 110 which drives an inductor current IL by turning on and off an upper switch 111 and a lower switch 112 and generates an output voltage VOUT from an input voltage PVDD; a lower current detection unit 210 which detects the inductor current IL flowing through the lower switch 112 during an ON-period of the lower switch 112 and acquires lower current feedback information Iinfo; an error amplifier 140 which outputs voltage feedback information Vinfo including information on an error between the output voltage VOUT (feedback voltage FB) and a reference voltage REF; an information synthesis unit 220 that generates synthesis feedback information VIinfo by synthesizing Iinfo with Vinfo; and an information holding unit 230 which samples Vinfo during the ON-period of the lower switch 112.
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公开(公告)号：US20180247889A1
公开(公告)日：2018-08-30
申请号：US15757389
申请日：2016-09-02
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato , Masafumi Okada
IPC: H01L23/528 , H01L23/00 , H02M1/08 , H03K17/687
CPC classification number: H01L23/528 , H01L23/49844 , H01L23/5286 , H01L24/06 , H01L24/14 , H01L2224/06177 , H01L2224/14177 , H01L2924/15311 , H02M1/08 , H02P27/06 , H03K17/6871 , H04B1/16
Abstract: This semiconductor device has a plurality of external terminals arranged in an array on a bottom surface of a package. The plurality of external terminals include a first external terminal group for receiving an input of a current from outside the device, and a second external terminal group for outputting a current to the outside of the device. The first external terminal group and the second external terminal group are laid out such that respective arrangement patterns thereof are interlocked with each other. The arrangement patterns may be comb-tooth shaped, cross-shaped, S-shaped, T-shaped, L-shaped, or may have a shape comprising a combination thereof. The plurality of external terminals may be pins, solder balls, or electrode pads.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20220247371A1
公开(公告)日：2022-08-04
申请号：US17725860
申请日：2022-04-21
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato , Seiji Takenaka , Tetsuo Tateishi
Abstract: This switching power source 100 has: a switching output circuit 110 which drives an inductor current IL by turning on and off an upper switch 111 and a lower switch 112 and generates an output voltage VOUT from an input voltage PVDD; a lower current detection unit 210 which detects the inductor current IL flowing through the lower switch 112 during an ON-period of the lower switch 112 and acquires lower current feedback information Iinfo; an error amplifier 140 which outputs voltage feedback information Vinfo including information on an error between the output voltage VOUT (feedback voltage FB) and a reference voltage REF; an information synthesis unit 220 that generates synthesis feedback information VIinfo by synthesizing Iinfo with Vinfo; and an information holding unit 230 which samples Vinfo during the ON-period of the lower switch 112.
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公开(公告)号：US20200076310A1
公开(公告)日：2020-03-05
申请号：US16374929
申请日：2019-04-04
Applicant: Rohm Co., Ltd.
Inventor： Seiji Takenaka , Masashi Nagasato , Tetsuo Tateishi
Abstract: A switching power supply includes: a switching output circuit configured to generate an output voltage from an input voltage by charging a capacitor by turning on and off an output transistor; a control circuit configured to halt the driving of the switching output circuit when charging electric charge to the capacitor per switching event is limited to a lower limit value and the output voltage, or a feedback voltage commensurate therewith, is raised from a predetermined reference voltage; and a lower limit value setting circuit configured to variably control the lower limit value during the driven period of the switching output circuit. For example, the lower limit value setting circuit can increase the lower limit value with increase in the number of times of switching.
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公开(公告)号：US10559528B2
公开(公告)日：2020-02-11
申请号：US15757389
申请日：2016-09-02
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato , Masafumi Okada
IPC: H01L23/528 , H01L23/00 , H02M1/08 , H03K17/687 , H02P27/06 , H04B1/16
Abstract: This semiconductor device has a plurality of external terminals arranged in an array on a bottom surface of a package. The plurality of external terminals include a first external terminal group for receiving an input of a current from outside the device, and a second external terminal group for outputting a current to the outside of the device. The first external terminal group and the second external terminal group are laid out such that respective arrangement patterns thereof are interlocked with each other. The arrangement patterns may be comb-tooth shaped, cross-shaped, S-shaped, T-shaped, L-shaped, or may have a shape comprising a combination thereof. The plurality of external terminals may be pins, solder balls, or electrode pads.
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公开(公告)号：US09929689B2
公开(公告)日：2018-03-27
申请号：US14922340
申请日：2015-10-26
Applicant: Rohm Co., Ltd.
Inventor： Masashi Nagasato
IPC: H02P27/04 , H03K17/687 , H02M1/34 , H01L23/64 , H02M3/158 , H02M7/5387
CPC classification number: H02P27/04 , H01L23/64 , H01L2924/14 , H01L2924/15311 , H01L2924/15312 , H01L2924/15313 , H01L2924/19041 , H01L2924/19042 , H01L2924/19105 , H02M1/34 , H02M3/158 , H02M7/5387 , H02M2001/348 , H03K17/687 , H03K17/6872 , H05K1/0243 , H05K1/025
Abstract: A semiconductor device disclosed in the present specification has a structure that includes: a first terminal that is to be externally connected to a power source line; a second terminal that is to be externally connected to a ground line; a third terminal that is internally connected to the first terminal and to be externally connected to a first terminal of a bypass capacitor; and a fourth terminal that is internally connected to the second terminal and to be externally connected to a second terminal of the bypass capacitor.
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公开(公告)号：US12160172B2
公开(公告)日：2024-12-03
申请号：US17777137
申请日：2020-12-03
Applicant: Rohm Co., Ltd.
Inventor： Isao Takobe , Masashi Nagasato
Abstract: An output feedback control circuit includes, as a means for generating an error signal ERR between a feedback voltage FB commensurate with an output voltage and a reference voltage REF (means for substituting for a single error amplifier 140), a first signal processor (for example, an amplifier 140a) that forms a first path, and a second signal processor (for example, an amplifier 140b) that forms a second path. The amplifier 140a is more accurate than the amplifier 140b, and the amplifier 140b is faster than the amplifier 140a. To the output terminal of the amplifier 140a, preferably, a capacitor Cc other than a parasitic element is connected. To the output terminal of the amplifier 140b, preferably, no capacitor other than a parasitic element is connected, and a resistor Rc is connected. Preferably, the amplifier 140a has a transconductance gm1, and the amplifier 140b has a transconductance gm2 (≠gm1).
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