Bias voltage generator for n-channel based linear regulator
US10243443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2016 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Mar 16, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for a bias supply circuit to support power supply including a switched-mode voltage converter cascaded with an n-channel-based linear regulator are provided. In an example, a cascaded power supply system can include a switched-mode DC-to-DC power converter, including an input voltage node, a first stage output voltage node, and a bootstrapped floating bias voltage node, and a linear regulator circuit. The linear regulator circuit can include an n-channel field-effect transistor (NFET) pass transistor, including a drain terminal coupled to the first stage output voltage node, a gate terminal, and a source terminal configured to provide a second-stage output voltage, and a gate driver circuit, including a driver output coupled to the gate terminal of the NFET pass transistor, and a high side supply node configured to receive a bias voltage generated from the bootstrapped floating bias voltage node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.