Power supply control apparatus for changing power line connection type in response to operation mode in semiconductor memory device

Abstract

The present invention relates to a power supply selectively using a chip driving power and a data input/output driving power in a semiconductor device. The power supply according to the present invention includes a switch for selectively coupling a first power line providing power to an internal circuit to a second power line providing power to a data input/output unit in response to a control signal which is produces according to an operation mode; and a controller for receiving row address strobe signals corresponding to each of memory banks, and a self-refresh signal activated in a refresh mode and producing the control signal. Accordingly, the present invention has an effect on the reduction of a noise generated on the power line, by selectively using the chip driving power and the data input/output driving power. Furthermore, the present invention increases the operation speed of the memory device by effectively using the power lines.

Dependencies are inferred from the claim text.