1 Features

• Wide operating input voltage range: 2.7 V to 16 V

– 20-V absolute maximum

• Integrated FET with low On-resistance: RON = 6

mΩ (typ.)

• Fast overvoltage protection

– Adjustable overvoltage lockout (OVLO) with

1.2-μs (typ.) response time

• Overcurrent protection with load current monitor

output (ILM)

– Circuit-breaker response

– Adjustable threshold (ILIM) 1.5 A–11 A

• ±10 accuracy for ILIM > 2 A

– Adjustable transient blanking timer (ITIMER) to

allow peak currents up to 2 × ILIM

– Output load current monitor accuracy: ±10

(IOUT ≥ 2 A)

• Fast-trip response for short-circuit protection

– 640-ns (typ.) response time

– Adjustable (2 × ILIM) and fixed thresholds

• Active high enable input with adjustable

undervoltage lockout threshold (UVLO)

• Active low enable input with adjustable

undervoltage lockout threshold (OVLO)

• Adjustable output slew rate control (dVdt)

• Overtemperature protection

• Quick Output Discharge

• Digital outputs

– Power Good (PG) and fault indication (FLT)

• UL 2367 recognition (pending)

• IEC 62368 CB certification (pending)

• Small footprint: QFN 2 mm × 2 mm, 0.45-mm pitch

2 Applications

• Optical modules

• Server/PC motherboard/add-on cards

• Enterprise routers/data center switches

• Industrial PC

• UHDTV

3 Description

The TPS25981xx family of eFuses is a highly

integrated circuit protection and power management

solution in a small package. The devices

provide multiple protection modes using very few

external components and are a robust defense

against overloads, short-circuits, voltage surges and

excessive inrush current.

Output slew rate and inrush current can be

adjusted using a single external capacitor. Loads

are protected from input overvoltage conditions by

cutting off the output if input exceeds an adjustable

overvoltage threshold. The devices respond to output

overload by actively limiting the current (during startup)

or breaking the circuit (during steady-state).

The overcurrent protection threshold as well as

the transient overcurrent blanking timer are user

adjustable. The current limit control pin also functions

as an analog load current monitor.

The devices are available in a 2-mm × 2-mm, 10-

pin HotRod™ QFN package for improved thermal

performance and reduced system footprint.

The devices are characterized for operation over a

junction temperature range of –40°C to +125°C.