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- Voltage_droop abstract "Voltage droop is the intentional loss in output voltage from a device as it drives a load. Employing droop in a voltage regulation circuit increases the headroom for load transients.Although it may seem counterproductive, a series resistor is included between the regulator output and the load. The resistance needs to be chosen so that at maximum output current, the output voltage at the load is the minimum acceptable. Conversely, when the output current is (near) zero, the voltage is near the maximum. This follows simply from Ohm's law. The behaviour of the system with and without the added droop resistor is as follows:File:Droop behaviour.pngIn a regulator not employing droop, when the load is suddenly increased very rapidly (i.e. a transient), the output voltage will momentarily sag. Conversely, when a heavy load is suddenly disconnected, the voltage will show a peak. The output decoupling capacitors have to "absorb" these transients before the loop has a chance to compensate. A diagram of such transients is shown below. The maximum allowed voltage swing in such a transient is .File:Regulator no droop.pngComparing this to a regulator with droop, we find that the maximum allowed swing has doubled: it is now . This increased tolerance to transients allows us to decrease the number of output capacitors, or get better regulation with the same number of capacitors.File:Regulator droop.png".
- Voltage_droop thumbnail Droop_behaviour.png?width=300.
- Voltage_droop wikiPageExternalLink Speed%20Droop%20and%20Power%20Generation.pdf.
- Voltage_droop wikiPageExternalLink 993.
- Voltage_droop wikiPageID "4385997".
- Voltage_droop wikiPageRevisionID "601967218".
- Voltage_droop hasPhotoCollection Voltage_droop.
- Voltage_droop subject Category:Electrical_parameters.
- Voltage_droop subject Category:Electronics.
- Voltage_droop type Abstraction100002137.
- Voltage_droop type Cognition100023271.
- Voltage_droop type Concept105835747.
- Voltage_droop type Constant105858936.
- Voltage_droop type Content105809192.
- Voltage_droop type ElectricalParameters.
- Voltage_droop type Idea105833840.
- Voltage_droop type Parameter105859071.
- Voltage_droop type PsychologicalFeature100023100.
- Voltage_droop type Quantity105855125.
- Voltage_droop comment "Voltage droop is the intentional loss in output voltage from a device as it drives a load. Employing droop in a voltage regulation circuit increases the headroom for load transients.Although it may seem counterproductive, a series resistor is included between the regulator output and the load. The resistance needs to be chosen so that at maximum output current, the output voltage at the load is the minimum acceptable.".
- Voltage_droop label "Voltage droop".
- Voltage_droop sameAs m.0b_gmw.
- Voltage_droop sameAs Q10920295.
- Voltage_droop sameAs Q10920295.
- Voltage_droop sameAs Voltage_droop.
- Voltage_droop wasDerivedFrom Voltage_droop?oldid=601967218.
- Voltage_droop depiction Droop_behaviour.png.
- Voltage_droop isPrimaryTopicOf Voltage_droop.
%20zero%2C%20the%20voltage%20is%20near%20the%20maximum.%20This%20follows%20simply%20from%20Ohm's%20law.%20The%20behaviour%20of%20the%20system%20with%20and%20without%20the%20added%20droop%20resistor%20is%20as%20follows%3AFile%3ADroop%20behaviour.pngIn%20a%20regulator%20not%20employing%20droop%2C%20when%20the%20load%20is%20suddenly%20increased%20very%20rapidly%20(i.e.%20a%20transient)%2C%20the%20output%20voltage%20will%20momentarily%20sag.%20Conversely%2C%20when%20a%20heavy%20load%20is%20suddenly%20disconnected%2C%20the%20voltage%20will%20show%20a%20peak.%20The%20output%20decoupling%20capacitors%20have%20to%20%22absorb%22%20these%20transients%20before%20the%20loop%20has%20a%20chance%20to%20compensate.%20A%20diagram%20of%20such%20transients%20is%20shown%20below.%20The%20maximum%20allowed%20voltage%20swing%20in%20such%20a%20transient%20is%20.File%3ARegulator%20no%20droop.pngComparing%20this%20to%20a%20regulator%20with%20droop%2C%20we%20find%20that%20the%20maximum%20allowed%20swing%20has%20doubled%3A%20it%20is%20now%20.%20This%20increased%20tolerance%20to%20transients%20allows%20us%20to%20decrease%20the%20number%20of%20output%20capacitors%2C%20or%20get%20better%20regulation%20with%20the%20same%20number%20of%20capacitors.File%3ARegulator%20droop.png%22%40en){kind=link}
