1 Features

• Wide input voltage range: 2.7 V to 26 V

– 30-V absolute maximum

• Low on-resistance: RON = 2.7-mΩ typical

• Adjustable current limit threshold

– Range: 2 A to 18 A

– Accuracy: ±8 (typical for ILIM > 5 A)

• Circuit breaker and current limiter options

• Adjustable overcurrent blanking timer

– Handles load transients without tripping

• Accurate current monitor output

– ±1.5 (typical at 25°C for IOUT > 3 A)

• User configurable fault response

– Latch-off or auto-retry

– Number of retries (finite or indefinite)

– Delay between retries

• Robust short-circuit protection

– Fast-trip response time < 400-ns typical

– Immune to line transients – no nuisance

tripping

• Adjustable output slew rate (dVdt) control

• Option to drive external FET for reverse current

blocking in disabled/OFF state

• Adjustable undervoltage lockout

• Adjustable overvoltage lockout

• Integrated overtemperature protection

• Power good indication

• Small footprint: 4-mm × 4-mm QFN package

2 Applications

• Hot-swap, hot-plug

• Power multiplexing

• Server standby rail, PCIe riser, add-on card, and

fan module protection

• Router and switch optical module protection

• Industrial PC

• Cordless power tool charger

3 Description

The TPS25983 family of eFuses is a highly integrated

circuit protection and power management solution in

a small package. The devices are operational over

a wide input voltage range. A single part caters

to low-voltage systems needing minimal I*R voltage

drop as well as higher voltage, high current systems

needing low power dissipation. They are a robust

defense against overloads, short-circuits, voltage

surges, reverse current, and excessive inrush current.

Overvoltage events are limited by internal cutoff

circuits with user adjustable overvoltage threshold.

Multiple device options exist to choose between the

response to overcurrent conditions, circuit breaker, or

active current limiter. The overcurrent limit threshold

can be set with a single external resistor. The devices

intelligently manage the overcurrent response by

distinguishing between transient events and actual

faults, thereby allowing the system to function

uninterrupted during line and load transients without

compromising on the robustness of the protection

against faults. The device can be configured to

stay latched-off or retry automatically after a fault

shutdown. The number of auto-retries as well as

the retry delay are configurable with capacitors. This

enables remote systems to automatically recover from

temporary faults while ensuring that power supplies

are not stressed indefinitely due to a persistent fault.

The devices provide an option to drive an external

N-FET connected in series to facilitate reverse current

blocking in disabled or OFF state.

Also, the devices integrate an accurate analog

load current monitor to provide enhanced system

monitoring and diagnostic capabilities.

The TPS25983 devices are available in a small, 4 mm

× 4 mm QFN package. The devices are characterized

for operation over a junction temperature range of

–40°C to 125°C.