Dropout and protection — 1V max at full load
The LM2940S-5.0: Maximum dropout voltage is 1V at 1A output current, so the input rail needs at least 6V to maintain regulation at full load. The quiescent current sits at 10 mA typical, with a 15 mA supply maximum. On-chip protection covers over current, over temperature, reverse polarity, and short circuit — a complete set for an automotive or industrial 5V bus without external clamp diodes.
NRND — sourcing for existing BOM lines
It remains available through independent distribution for production replenishment and legacy BOM support, but new designs should evaluate current-production alternatives.
TO-263-3 DDPAK — thermal and footprint
Supplied in a TO-263-3 DDPAK surface-mount package (3 leads plus exposed tab).