Do you really think you'll use that much power. The link the OP posted said bust up to 2 amps The Lm78 can handle 2.2 Amps in short burst.
These burst of the SM5100B cellular module only last 4.6 mS
Do you really think you'll use that much power. The link the OP posted said bust up to 2 amps The Lm78 can handle 2.2 Amps in short burst.
These burst of the SM5100B cellular module only last 4.6 mS