Active — still a current BOM line
The LTC4260CSW#TRPBF: This is a positive high-voltage hot swap controller with an I²C monitor interface, designed to manage inrush current when a board is plugged into a live backplane and to report fault conditions back to the host.
Wide supply range — 8.5 V to 80 V
The 8.5 V to 80 V supply range is the headline spec — it covers common backplane voltages from 12 V to 48 V telecom rails with margin. A 48 V system sees the controller still regulating during a sag down to 8.5 V, and the 80 V upper limit handles transients without an external clamp. Internal switch is not present — the controller drives an external N-channel MOSFET. The designer selects the FET based on the load current and the inrush profile.
Programmable inrush and fault handling
Programmable features include Auto Retry, Current Limit, Fault Timeout, Latched Fault, Overvoltage Protection (OVP), Slew Rate, and Undervoltage Lockout (UVLO). These are set with external resistors and a capacitor on the TIMER pin — no software needed at power-up. The I²C interface lets the system microcontroller read the output voltage, current, and fault status, and adjust the overcurrent threshold on the fly. Useful for a telecom line card that needs to report its power-good status to the shelf manager.
Housed in a 24-SOIC wide-body (0.295", 7.50 mm width) — the same footprint as many power-management ICs. The wide pitch (1.27 mm) makes it hand-solderable and reworkable in the field without a hot-air station. Surface-mount only; no through-hole variant.