Cascaded LDO voltage regulator
US9989981B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2017 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Jun 16, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/75
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage regulator is disclosed. The voltage regulator is cascaded, including first and second stages. The first stage may be a capacitor-less first stage that includes a source follower implemented with a first PMOS transistor, with the first PMOS transistor receiving a first reference voltage on its respective gate terminal. The first stage is coupled to receive a first voltage from an external voltage supply, and to provide a second voltage to the second stage. The second stage may be directly and exclusively coupled to the first stage, with no capacitor or connection for one coupled to the first stage output. The second stage may provide an output voltage, on an output node, with the output voltage being less than the second voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.