Its 60 dB power-supply rejection ratio at 120 Hz means it attenuates full-wave rectified mains ripple by a factor of 1000 — a meaningful figure for any analog rail that shares a transformer winding with a digital load.
Output voltage range and protection scheme
Output is adjustable from -1.2 V down to -37 V using two external resistors in the classic LM337 divider network. The single regulator integrates over-temperature shutdown and output short-circuit protection — no external crowbar or thermal cutoff needed for basic fault coverage.