10V to 80V Hot Swap Controller with Accurate Monitoring, PMBus Interface and Dynamic Transient Load Support

The RTQ1954 provides enterprise-level protection and high-performance monitoring for 10V to 80V systems such as 48V/54V datacenter network equipment. Sub-μs response to short-circuit faults, multiple adjustable high-resolution overcurrent thresholds and remote temperature sensing with adjustable thresholds allow the RTQ1954 to protect and monitor critical systems – including those with wide dynamic range transient loads. Optional programmable MOSFET SOA protection accurately controls maximum MOSFET power dissipation while MOSFET health algorithms monitor the MOSFET even when fully enhanced. An adjustable overcurrent fault timer avoids false trips during dynamic transient overload events while maintaining robust protection from real overload conditions.For monitoring, the RTQ1954 measures real-time power, voltage, current, temperature and fault data, and transmits this information via an I²C/SMBus interface with PMBus compliant command structure. Precision telemetry enables intelligent power management functions, power optimization and early fault detection. The RTQ1954 also improves system diagnostics with adjustable telemetry averaging and peak power measurement.The RTQ1954 is available in the TSSOP-28 (Exposed Pad) package. The recommended junction temperature range is -40°C to 125°C.