Invention Grant
- Patent Title: Stacked buck converter with inductor switching node pre-charge and conduction modulation control
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Application No.: US17132814Application Date: 2020-12-23
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Publication No.: US12113442B2Publication Date: 2024-10-08
- Inventor: Sally Amin
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Schwabe, Williamson & Wyatt, P.C.
- Main IPC: H02M3/158
- IPC: H02M3/158 ; G06F1/3287

Abstract:
A stacked voltage regulator (VR) that pre-charges inductor switching node to mitigate EOS. The stacked VR comprises at least three n-type devices (low-side) and three p-type devices (high-side) coupled in series. The three p-type stacked devices are part of a high-side of the VR. Node Vx coupling one of the n-type devices and one of the p-type devices is coupled to an inductor, which is also coupled to a load capacitor. During the inductor charging phase, in the low-to-high transition, a small p-type device is added to pre-charge the inductor switching node (Vx) from “0” to “VDD−Vth” through the low-side by connecting a generated mid-rail “Vdd” to the internal node of the n-type stack for a short period (e.g., about 50 ps). A controlled conductance modulation (CCM) scheme on the high-side top switch during the inductor charging phase is used to mitigate the ringing without controlling the gate drive strength.
Public/Granted literature
- US20210152090A1 STACKED BUCK CONVERTER WITH INDUCTOR SWITCHING NODE PRE-CHARGE AND CONDUCTION MODULATION CONTROL Public/Granted day:2021-05-20
Information query
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