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A voltage down converter with submicroampere standby current for low-power static RAMs

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3 Author(s)
Ishibashi, K. ; Hitachi Ltd., Tokyo, Japan ; Sasaki, K. ; Toyoshima, H.

A submicroampere standby current voltage downconverter (VDC) for high-density, low-power static RAMs is described. The current consumption of the VDC in standby mode can be decreased by using a novel low-current and temperature-independent current source circuit. The total current is less than 0.5 μA at external voltage ranging from 3 to 5 V and at temperatures ranging from -20 to 80°C. The voltage-follower circuits for standby and operation modes are stable despite the low current consumption in the standby mode. The phase margin of the voltage follower for standby mode is 50°, and that for operation mode is 90°. This indicates that the VDC is a promising circuit for battery-backup and high-density static RAMs

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:27 ,  Issue: 6 )

Date of Publication:

Jun 1992

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