IN-RUSH CURRENT CONTROL FOR CHARGE-PUMP LDO

摘要

A circuit for a charge-pump low-dropout (LDO) regulator may include a comparator circuit configured to control a pass transistor based on an error signal. A pre-charge path may be provided between a supply voltage and an output node of the regulator. The pre-charge path may be configured to allow charging of an output capacitor to a pre-charge voltage during a pre-charge operation mode. The output capacitor may be coupled between the output node of the regulator and ground potential. The pass transistor may be configured to allow charging of the output capacitor during an LDO mode of operation. A charge-pump circuit may be configured to provide a current for charging the output capacitor during the LDO mode of operation.

主权项

1. A circuit for a charge-pump low-dropout (LDO) regulator, the circuit comprising:
a comparator circuit configured to control a pass transistor based on a an error signal; a pre-charge path provided between a supply voltage and an output node of the regulator, the pre-charge path being configured to allow charging of an output capacitor to a pre-charge voltage during a pre-charge operation mode, the output capacitor being coupled between the output node of the regulator and ground potential; the pass transistor configured to allow charging of the output capacitor during an LDO mode of operation; and a charge-pump circuit configured to provide a current for charging the output capacitor during the LDO mode of operation.