Power supply unit for an IC memory card

Details Power supply unit for an IC memory card Power supply unit for an IC memory card

1995-03-31

1996-11-05

Nelms, David C.

Static information storage and retrieval

Powering

365227, 327530, 327538, G11C 1602

Patent

active

055724787

ABSTRACT:
A power supply unit including DC-DC converter using a thin and planar inductor arranged in an IC memory card incorporating an EEPROM memory chip, wherein a voltage is adjusted by a dropping regulator, thereby reducing power consumption. The thin and planar inductor includes, stacked on a semiconductor substrate, a planar coil and magnetic thin films formed to sandwich the planar coil, so that an entire area of an IC card can be decreased. The IC card can be driven by a single power supply, thus providing a compact portable information device which can be driven by a battery for a long time.

REFERENCES:
patent: 5267218 (1993-11-01), Elbert
patent: 5388084 (1995-02-01), Itoh

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