60V input, 1.5A switch — what this buck covers
The LT1956EFE#TRPBF is a step-down (buck) switching regulator from Analog Devices that accepts an input from 5.5V to 60V and delivers an adjustable output from 1.219V up to 54V via its internal 1.5A switch. The 500kHz fixed switching frequency keeps the external inductor and capacitor small, which matters when board space is tight in industrial or automotive auxiliary supplies. It is a non-synchronous design — you supply the catch diode — and the 16-TSSOP package with exposed pad needs a thermal via stitch to the ground plane to handle the dissipation at full load.
Active lifecycle — no LTB clock ticking
This part carries an Active product status, so there is no last-time-buy window to track. It is ROHS3 compliant. For a BOM line that needs a wide-input-range buck in production, this is a clean qualification — no end-of-life risk on the horizon.
Package and thermal: the exposed-pad detail
The 16-TSSOP with exposed pad (16-TSSOP-EP) is the key assembly detail. The pad must be soldered to a copper plane on the PCB — without that thermal path the junction temperature climbs fast above 400 mA continuous output. The part is surface-mount only, and the tape-and-reel suffix (#TRPBF) means it ships on a 13-inch reel; cut-tape quantities are also available for prototyping.