公开(公告)号：US20220171420A1

公开(公告)日：2022-06-02

申请号：US17385010

申请日：2021-07-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jeongpyo PARK ,  TAE-HWANG KONG ,  JUNHYEOK YANG ,  JOOSEONG KIM

IPC: G05F3/26 ,  G05F1/46

Abstract: An electronic device including: a reference voltage generator circuit to generate a reference voltage based on a first and second voltage, the reference voltage generator circuit including: a first current source to supply a first current to each of a first and second node; an amplifier to amplify a difference between the first voltage of the first node and the second voltage of the second node and to output a difference voltage corresponding to the amplified difference; a first bipolar junction transistor (BJT) connected to the first node; a first resistor connected to the second node; a second BJT connected between the first resistor and ground; a second resistor connected between the second node and ground; and a first transistor to be supplied with a second current from the first current source; and an adaptive cascode circuit to generate a bias voltage applied to a gate of the first transistor.

公开(公告)号：US20220190720A1

公开(公告)日：2022-06-16

申请号：US17477813

申请日：2021-09-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jeongpyo PARK ,  Taehwang KONG ,  Junhyeok YANG ,  Donghoon JUNG

IPC: H02M3/158 ,  H02M1/00 ,  H02M3/157 ,  H02M1/15

Abstract: A DC-DC converter including a switching buck regulator including a first power switch connected to a first power node, a second power switch connected to a second power node, a driver configured to drive the first and second power switches, an output filtering inductor connected to a node between the first and second power switches, and an output filtering capacitor connected to the output filtering inductor, a controller configured to compensate for an output signal of the switching buck regulator in a time domain using a reference voltage, and a feed forward circuit connected between the switching buck regulator and the controller, and including a first buffer, a second buffer, an RC filter, and an adder may be provided. Accordingly, the DC-DC converter can reduce a delay of a compensation circuit, improve transient response characteristics of the switching buck regulator, and further improve the performance of the DC-DC converter.

公开(公告)号：US20220100218A1

公开(公告)日：2022-03-31

申请号：US17315621

申请日：2021-05-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： DONGHOON JUNG ,  TAE-HWANG KONG ,  SANGHO KIM ,  JUNHYEOK YANG ,  Jeongpyo PARK

IPC: G05F1/575 ,  H02M3/07

Abstract: Disclosed is an electronic device, which includes an amplifier circuit that receives a feedback voltage and a reference voltage and amplifies a difference between the feedback voltage and the reference voltage to output an amplified difference voltage, an analog-to-digital converter that converts the amplified difference voltage to a digital code including two or more bits, and low-dropout (LDO) regulators that outputs output voltages based on the digital code. Each of the LDO regulators includes power transistors outputting a corresponding output voltage of the output voltages, drives one of the power transistors in a switching state, and drives each of remaining power transistors in a turned-on state or a turned-off state.

公开(公告)号：US20240019886A1

公开(公告)日：2024-01-18

申请号：US18374028

申请日：2023-09-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jeongpyo PARK ,  TAE-HWANG KONG ,  JUNHYEOK YANG ,  JOOSEONG KIM

IPC: G05F3/26 ,  G05F1/46

CPC classification number: G05F3/267 ,  G05F1/461 ,  G05F1/468

Abstract: An electronic device including: a reference voltage generator circuit to generate a reference voltage based on a first and second voltage, the reference voltage generator circuit including: a first current source to supply a first current to each of a first and second node; an amplifier to amplify a difference between the first voltage of the first node and the second voltage of the second node and to output a difference voltage corresponding to the amplified difference; a first bipolar junction transistor (BJT) connected to the first node; a first resistor connected to the second node; a second BJT connected between the first resistor and ground; a second resistor connected between the second node and ground; and a first transistor to be supplied with a second current from the first current source; and an adaptive cascode circuit to generate a bias voltage applied to a gate of the first transistor.