1 Features

• Input operating voltage range: 2.9 V to 16 V

– 20-V absolute maximum at input

– Withstands up to –1 V at output

• Integrated low on-resistance FET: 0.79 mΩ (typ.)

– Rated for 50 A RMS and 60 A peak current

• Can be used as a standalone eFuse or primary

controller in parallel configuration

– Supports parallel connection of multiple eFuses

for higher current support

– Active device state synchronization and load

sharing during start-up and steady-state for

unlimited scalability

• PMBus® interface for telemetry, control,

configuration and debug

– PIN/EIN/VIN/VOUT/IIN/temperature/fault

monitoring

– Power cycle with a single command

– On-chip non-volatile configuration memory

– Blackbox fault recording of multiple events with

relative time-stamp and option to store on an

external EEPROM

• Robust overcurrent protection

– Programmable overcurrent threshold (IOCP): 7 A

to 50 A with accuracy of ±5 (max.)

– Circuit-breaker response during steady-state

with a programmable transient blanking timer

(OC_TIMER) to support peak load currents

– Active current limit during start-up (ILIM)

• Robust short-circuit protection

– Fast-trip response (280 ns)

– Programmable and fixed thresholds

– Immune to supply line transients — no

nuisance tripping

• Programmable overtemperature protection (OTP)

– Assured FET SOA: 8 W√s

• Integrated FET health monitoring and reporting

• Precise analog load current monitoring (IMON)

– ±2 accuracy

– > 500-kHz analog bandwidth

• Fast overvoltage protection with programmable

threshold

• Programmable output slew rate control (dVdt)

• Programmable insertion delay timer

• Programmable undervoltage lockout (UVLO)

• Analog die temperature monitor output (TEMP)

• Four configurable general purpose I/O pins

• Small footprint: QFN 4.5-mm × 5-mm, 0.6-mm

pitch

– 29-mil clearance between power and GND pins

• 100 Pb Free

2 Applications

• Server and high performance computing

• Network interface cards

• Graphics and hardware accelerator cards

• Datacenter switches and routers

• Input hotswap and hotplug

• Fan trays

3 Description

The TPS25990 is an integrated, high-current circuit

protection and power management 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.

The integrated PMBus® interface allows a host

controller to monitor, control and configure the system

in real-time. Key system parameters can be read

back by remote telemetry. Various protection, warning

thresholds and coefficients can be configured through

PMBus® or stored in non-volatile configuration

memory. Blackbox fault recording feature helps in the

debugging of field failures and returns.

The device can be used as a standalone eFuse, or

connected as a primary controller in a parallel eFuse

configuration for higher current support. All devices

actively synchronize their operating state and share

current during start-up and steady state to avoid overstressing

some of the devices which can result in

premature or partial shutdown of the parallel chain.