SYSTEM AND METHOD FOR CURRENT SENSING WITHIN A VOLTAGE REGULATOR

摘要

A current sense amplifier includes a high-side current sense amplifier and a low-side current sense amplifier. The high-side current sense amplifier provides a current sense voltage signal for use with a voltage regulator and generates the current sense voltage signal responsive to a first current sensed through a high-side switching transistor in a first mode when the high-side switching transistor is turned on and the low-side switching transistor is turned off. The high-side current sense amplifier generates the current sense voltage signal responsive to a second current through the low-side switching transistor in a second mode when the low-side switching transistor is turned on and the high-side switching transistor is turned off. The low-side current sense amplifier senses the second current through the low-side switching transistor and generates a current control signal to the high-side current sense amplifier in the second mode.