Function and key features
The MAX5903LBEUT-T is a single-channel hot swap controller from Maxim Integrated's Simple Swapper™ series, designed to protect a downstream load during board insertion into a live backplane. It integrates both internal switches and draws 1 mA supply current, keeping the quiescent load off the bus. Programmable protection features include circuit breaker, current limit, latched fault, thermal limit, and undervoltage lockout (UVLO) — all configurable with external resistors, so the trip thresholds match the load's inrush profile. The controller is rated for networking applications and operates over the industrial temperature range of -40°C to 85°C, suitable for outdoor telecom cabinets and factory-floor enclosures where the backplane bus can sag or surge.
Supply voltage and package
Supply voltage range is 9V to 72V. The SOT-23-6 package (supplier device package SOT-23-6) keeps the footprint small for dense line cards.
RoHS and compliance
The MAX5903LBEUT-T is RoHS non-compliant. Verify your assembly house's exemption policy or plan for a lead-bearing solder process.
