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A new on-chip voltage regulator for high density CMOS DRAMs

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14 Author(s)
Mao, R.S. ; Etron Technology Inc., Hsinchu, Taiwan ; Chao, H.H. ; Chi, Y.C. ; Chung, P.W.
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The authors report on new voltage regulator circuitry used in a 4 Mb CMOS DRAM. The DRAM accepts a 5 V external power supply and generates 3.3 V on chip. The chip photomicrograph is provided with a magnified portion of the regulator. The internal voltage V/sub INT/ is regulated at 3.3 V (25 degrees C), while V/sub DD/ varies from 3.3 to 6.2 V. V/sub INT/ presents a positive temperature coefficient, which is adjustable, to compensate the higher cell leakage and the slowdown of MOSFET operations at higher temperature. While V/sub DD/ is raised above 6.3 V, the regulator enters the burn-in mode where V/sub INT/ follows a 2/3 V/sub DD/ curve, which gives an exact internal burn-in voltage as desired. This internal burn-in voltage is insensitive to temperature and process variations.<>

Published in:

VLSI Circuits, 1992. Digest of Technical Papers., 1992 Symposium on

Date of Conference:

4-6 June 1992

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