High-speed low-impedance boosting low-dropout regulator
AssigneeSkyworks Solutions, Inc.
InventorsPéter Onódy, Tamás Marozsák, Viktor Zsolczai, András V. Horváth
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Abstract
A method for regulating a voltage reference signal includes providing a first output current during a first interval and a boosted output current during a second interval to generate a low-dropout voltage reference signal based on a first power supply voltage, a second power supply voltage, and a reference voltage level. The method includes, during the second interval, compensating for a voltage drop caused by providing the boosted output current. The first output current may be provided in a first mode of operation. The boosted output current and voltage drop compensation may be provided in a boosted mode of operation.
Claims20
A method for regulating a voltage signal, the method comprising:
- providing a first output current during a first interval and a boosted output current during a second interval to generate a low-dropout regulated voltage signal based on a first power supply voltage, a second power supply voltage, and a reference voltage level;
- and
- during the second interval, compensating for a voltage drop caused by providing the boosted output current.
An integrated circuit comprising:
- a low-dropout regulator comprising:
- an input voltage reference node;
- an output regulated voltage node;
- a differential amplifier comprising a non-inverting input coupled to the input voltage reference node;
- a feedback circuit coupled between the output regulated voltage node and an inverting input to the differential amplifier;
- a first device coupled between a first power supply node and an intermediate node and having a control node coupled to an output of the differential amplifier;
- a second device coupled between a second power supply node and the output regulated voltage node and having a second control node coupled to the intermediate node;
- a first load stage coupled between the output regulated voltage node and the first power supply node and responsive to a boost control signal;
- and
- a compensation stage coupled between the second power supply node and the intermediate node and responsive to a complementary boost control signal.
An apparatus comprising:
- means for providing a first output current during a first interval and a boosted output current during a second interval to generate a low-dropout voltage reference signal based on a first power supply voltage, a second power supply voltage, a reference voltage level;
- and
- means for compensating for a voltage drop caused by providing the boosted output current during the second interval.
Dependencies are inferred from the claim text.