Methods and circuits to reduce power consumption of DRAM local word-line
drivers are disclosed. A first voltage converter provides a voltage VPP1,
which is lower than the voltage VPP required to operate a word-line of a
DRAM cell array. A voltage detector monitors the voltage level of the
local word-line driver. Once the voltage level VPP1 is reached on the
local word-linedriver switching means as e.g. tri-state drivers put the
final VPP voltage on the word line. This VPP voltage is the output of a
second voltage boost converter. Putting the voltage in two stages on the
word-line reduces the overall power consumption. The voltage level VPP1
has to be carefully selected to find a compromised solution between
current consumption and performance.