1 Features

• Wide operating input voltage range: 3.5V to 23V

– 28V absolute maximum

– Can be powered from either IN or OUT

• Integrated back-to-back FETs with low ONresistance:

RON = 12.2mΩ (typ)

• Ideal diode operation with true reverse current

blocking (RCB)

– External pin control (RCBCTRL) to disable

RCB and allow bi-directional power delivery

in steady-state to support USB OTG or DRP

operation

• Fast overvoltage protection

– Adjustable overvoltage lockout (OVLO) with

1μs (typ) response time

• Overcurrent protection with load current monitor

output (ILM)

– Active current limit response

– Adjustable threshold (ILIM) 1A–9A

• ±10% accuracy (max) for ILIM > 3A

– Adjustable transient blanking timer (ITIMER) to

allow peak currents > ILIM

– Output load current monitor accuracy: ±6%

(typ) (IOUT ≥ 3A)

• Fast-trip response for short-circuit protection

– < 1μs (typ) response time

– Adjustable and fixed thresholds

• Active high enable input with adjustable

undervoltage lockout threshold (UVLO)

• Adjustable output slew rate control (dVdt)

• Overtemperature protection

• Digital outputs: Supply Good (SPLYGD/SPLYGD)

and Fault Indication (FLT)

• UL 2367 recognition (planned)

• IEC 62368-1 CB certification (planned)

• IEC 61000-4-5: 28V on IN

• Small footprint: PowerWCSP 2.4mm × 1.7mm,

0.5mm pitch

2 Applications

• Adapter and charger input protection

• USB PD protection: smartphone, tablet, PC,

notebook, monitor, dock

• Server motherboard, add-on cards

• Enterprise storage: HBA, SAN, and eSSD

• Power MUXing and ORing

3 Description

The TPS25948xx family of eFuses is a highly

integrated, circuit-protection and power-management

solution in a small package. The devices

provide multiple protection modes that use few

external components and are a robust defense

against overloads, short-circuits, voltage surges and

excessive inrush current. With integrated back-toback

FETs, reverse current flow from output to input

is blocked at all times, making the devices well suited

for power MUX and ORing applications, as well as

systems that need load side energy hold up storage

if input power supply fails. The devices use a linear

ORing based scheme to ensure almost zero DC

reverse current and emulate ideal diode behavior with

minimum forward voltage drop and power dissipation.

The devices also provide an external pin control

option to disable the reverse current blocking and

allow bi-directional power delivery in steady-state.

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. The output current limit

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 2.4mm × 1.7mm, 12-

ball power wafer chip scale package (PowerWCSP)

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.