描述 Description

The TPS25984Bx is a high-current, stackable integrated hotswap protection (eFuse) device in a small package. The device provides multiple protection modes using very few external components and is a robust defense against overloads, short circuits, and excessive inrush current.

Applications with particular inrush current requirements can set the output slew rate with a single external capacitor. Output current limit level can be set by user as per system needs. Internal overcurrent blanking timer allows systems to support transient peaks in the load current without tripping the eFuse.

Multiple TPS25984Bx devices can be stacked in parallel to increase the total current capacity for high power systems. All devices share current during start-up to avoid over-stressing some of the devices which can result in premature or partial shutdown of the parallel chain.

An integrated fast and accurate sense analog load current monitor facilitates predictive maintenance and advanced dynamic platform power management techniques such as Intel PSYS and PROCHOT? to maximize system throughput and power supply utilization.

The devices are characterized for operation over a junction temperature range of –40°C to +125°C.

特性 Features

Input operating voltage range: 4.5V to 16V

Absolute maximum: 20V DC, 23.5V transient

Withstands negative voltages up to –1V output



Integrated FET, ultra-low RDSON: 0.8mΩ (typ)

Rated RMS current: 55A; peak current: 70A

Supports parallel connection of multiple eFuses for higher current support

Current balancing during start-up



Robust overcurrent protection

Adjustable overcurrent threshold (IOCP): 10A to 80A with accuracy of ±5%

Circuit-breaker response during steady-state operation with internal transient overcurrent blanking timer to support peak currents

Adjustable active current limit in start-up (ILIM)



Robust short-circuit protection

Fast-trip response (<200ns) to output short-circuit events

Adjustable (2 × IOCP) and fixed thresholds

Immune to supply line transients — no nuisance tripping



Precise analog load current monitoring

Accuracy: ±1.4%; bandwidth: >500kHz



Fast overvoltage protection (fixed 18.4V threshold)

Adjustable output slew rate control (dVdt) for inrush current protection

Active high enable input with adjustable undervoltage lockout (UVLO)

Overtemperature protection (OTP)

FET SOA: 10W√s



Integrated FET health monitoring and reporting

Analog die temperature monitor output (TEMP)

Dedicated fault indication pin (GOK/FLT)

Power-Good indication pin (PG)

Small footprint: QFN-32, 5mm × 5mm

100% Pb free