LDO and load switch supporting a wide range of load capacitance
US9710003B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Mar 14, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/573
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An architecture and method to maintain stability of a low drop-out (LDO)/load switch linear voltage regulator (LVR). The architecture method support optionally determining during a power-up phase and by using a load detection circuit, the estimated load parameters that represents at least one selected from a group consisting of: the load time constant and the load resistor at an output node of the LDO/load switch LVR, and adjusting, based on the estimated output load parameters, an adaptive RC network in the LDO/load switch LVR, wherein the adaptive RC network produces an adaptive zero in a feedback network transfer function of the LDO/load switch LVR, wherein the adaptive zero reduces an effect of a non-dominant pole in the open loop transfer function of the LDO/load switch LVR, and wherein a frequency of the adaptive zero is adjusted based on the estimated load parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.