Transient load response for a voltage regulator with a load current based control loop
US7671575B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2006 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | May 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for improving transient response for a load coupled to a voltage regulator by employing both load current level information and the regulator's output voltage to control a loop that provides relatively faster and accurate regulation of the regulator's output voltage. The circuit includes an error amplifier that is coupled to a reference voltage and feedback resistors connected to the regulator's output voltage. This error amplifier outputs a compensation signal that is subsequently summed at a summing point with additional information regarding the amount of current flowing through the load. Then, this summed compensation signal is subsequently employed by a pulse width modulation (PWM) comparator and other components to regulate the regulator's output voltage with improved speed and accuracy. The circuit can be arranged in different topologies, including buck, boost, and buck/boost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.