The voltage regulator in portable, batteryopera
ted equipment must have minimum
dissipation, good temperature stability,
and be able to deliver an adequate current.
These requirements are met by the IRF9530
MOSFET series regulator from Precision
Monolithics Ine. (PMI). One of its main attributes
is the low drive current required:
the two Type OP90 opamps that drive it
and at the same time generate the reference
voltage draw only 20 µA.
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