Wide-input buck for industrial rails
The LT8631IFE#TRPBF is a step-down (buck) switching regulator from Analog Devices, delivering 1 A continuous output from a 3 V to 100 V input range — the 100 V maximum covers 48 V telecom rails, 72 V industrial buses, and 12 V/24 V automotive systems with headroom for transients. Output is adjustable from 0.8 V up to 60 V, positive polarity, with a single feedback resistor divider. The synchronous rectifier eliminates the external catch diode, saving board area and improving efficiency at light loads. Switching frequency is programmable from 100 kHz to 1 MHz via a resistor on the RT pin, letting the designer trade off inductor size against switching losses.
Package and board-fit for the TSSOP-EP
The supplier device package is 20-TSSOP-EP; the tape-and-reel format (TR) suits automated pick-and-place, while the cut-tape (CT) option is available for prototypes. The part is ROHS3 compliant, no exemptions.
Active lifecycle and compliance posture
For new designs, the wide input range and 1 A output cover a broad set of point-of-load rails. The closest peer in the same family is the LT8631HFE#PBF, which shares the same die and pinout but is packaged in a tube (not tape-and-reel) and is rated for a 150°C junction temperature — the H-grade variant for higher ambient environments. Both are active; the HFE variant is the better choice if the board sees sustained junction temperatures above 125°C.