| 摘要 |
A low drop-out regulator is configured to provide high output current with a fast response during transient conditions, while also maintaining low quiescent current under DC conditions. An exemplary low drop-out regulator comprises an error amplifier, a current feedback amplifier, and a pass device. The low drop-out regulator includes a composite amplifier feedback configuration, with the current feedback amplifier being decoupled from the overall composite feedback configuration and configured to provide effective compensation. As a result, the current feedback amplifier can be configured to operate with low current supplied from the error amplifier and to drive the control terminal of the pass device with sufficiently high current as demanded by a load device. In addition, the current feedback amplifier can be configured to permit the voltage at the control terminal of the pass device to operate from rail-to-rail. Further, the gain and offset of the low drop-out regulator can be provided by the error amplifier, without the requirement to drive a high amount of current.
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