1 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 shortcircuit

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

2 Applications

? Input hotswap and hotplug

? Server and high performance computing

? Network interface cards

? Graphics and Hardware accelerator cards

? Data center switches and routers

? Fan trays

3 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 startup

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.