80V input LDO with 75dB PSRR — the noise-sensitive rail choice
The LT3012BEFE#TRPBF is a positive adjustable LDO from Analog Devices, delivering 250 mA output from an input range up to 80 V. That 80 V ceiling covers 48 V telecom rails, 72 V industrial buses, and automotive load-dump transients without an external pre-regulator.
Dropout, quiescent current, and protection — the real-world operating envelope
Maximum dropout is 0.62 V at the full 250 mA load. That 620 mV headroom requirement sets the minimum input-to-output differential — if the input rail sags within 620 mV of the programmed output, the LDO falls out of regulation. The low Iq suits always-on or battery-backed rails where standby draw matters. On-chip protection includes overcurrent limiting, thermal shutdown, and reverse polarity protection — the reverse polarity block means the regulator survives a miswired input without an external series diode, which would otherwise add a dropout penalty.
Output range and temperature grade
The output is adjustable from a 1.24 V reference up to 60 V via an external resistor divider. The single regulator topology keeps the bill of materials simple — two feedback resistors and an output capacitor are the minimum external components.
Package and thermal interface
Housed in a 16-lead TSSOP with exposed pad (16-TSSOP-EP), the package footprint is 4.40 mm wide. Supplied in Tape & Reel (TR) or Cut Tape (CT) — the TR suffix indicates 2500-piece reel quantity for automated pick-and-place assembly.