What the 40 mA output ceiling means for your rail
The ICL7663ACSA+ is an adjustable positive linear regulator delivering up to 40 mA continuous output. That current ceiling suits low-power always-on blocks — a microcontroller sleep rail, a sensor bias supply, or a reference voltage buffer — where the load stays well under 40 mA and the priority is low quiescent draw, not high-current regulation.
Adjustable output and quiescent current
Output voltage adjusts from a 1.3 V minimum up to 16 V maximum, matching the maximum input voltage. The 12 µA typical quiescent current keeps the regulator's own draw negligible in battery-powered or energy-harvesting designs — the part's self-consumption stays below the leakage floor of most electrolytic output capacitors. A single Enable control pin lets the system power down the regulator without a separate load switch. Over-current protection is included on-chip; no external current-sense resistor is needed.