Invention Grant
- Patent Title: Circuit to control the effect of dielectric absorption in dynamic voltage scaling low dropout regulator
- Patent Title (中): 电路控制动态电压缩放低压差稳压器介质吸收的影响
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Application No.: US13692438Application Date: 2012-12-03
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Publication No.: US09122289B2Publication Date: 2015-09-01
- Inventor: Rupert Howes
- Applicant: Dialog Semiconductor GmbH
- Applicant Address: DE Kirchheim/Teck-Nabern
- Assignee: Dialog Semiconductor GmbH
- Current Assignee: Dialog Semiconductor GmbH
- Current Assignee Address: DE Kirchheim/Teck-Nabern
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman; Billy Knowles
- Main IPC: H02M3/157
- IPC: H02M3/157 ; G05F1/10

Abstract:
A circuit and method provides compensation for disturbance of an output voltage caused by dielectric absorption of a load capacitor of a low dropout voltage regulator after a modification of the output voltage level of the low dropout voltage regulator. A dielectric absorption current compensation circuit generates a profile current that is applied to an output of the low dropout voltage regulator and in parallel with the load capacitor to compensate for the dielectric absorption current. The dielectric absorption current compensation circuit has a programmable profile current generator that generates the profile current. A switchable current mirror transfers a mirror profile compensation current to the load capacitor to compensate for the dielectric absorption current. In some embodiments, the profile current is a continuous profile dielectric absorption compensation current and in other embodiments, the profile current is a digital profile dielectric absorption compensation current.
Public/Granted literature
- US20140152279A1 Circuit to Control the Effect of Dielectric Absorption in Dynamic Voltage Scaling Low Dropout Regulator Public/Granted day:2014-06-05
Information query
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