TPS2521xx, 2.7 - 5.7 V, 4 A, 31-mΩ True Reverse Current Blocking eFuse with Input

Reverse Polarity Protection

1 Features

• Wide operating input voltage range: 2.7 V to 5.7 V

• 28-V absolute maximum

• Withstands negative voltages up to – 15 V

• Integrated back-to-back FETs with low On-

• Ideal diode operation with true reverse current

blocking

• Fast overvoltage clamp (OVC) with pin-selectable

threshold (3.8 V, 5.7 V) with 5-μs (typ) response

time

• Overcurrent protection with load current monitor

output (ILM)

– Active current limit response

– Adjustable transient blanking timer (ITIMER) to

– Output load current monitor accuracy: ±6%

• Fast-trip response for short-circuit protection

– 500-ns (typ) response time

• Active High Enable input with adjustable

undervoltage lockout threshold (UVLO)

• Adjustable output slew rate control (dVdt)

• Overtemperature protection

• Power Good indication (PG) with adjustable

threshold (PGTH)

• IEC 62368 CB certification (pending)

• UL 2367 recognition (pending)

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

2 Applications

• Adapter input protection

• Enterprise storage - RAID/HBA/SAN/eSSD

• USB PD port protection

• Server/PC motherboard/add-on cards

• Monitors/docks

3 Description

The TPS2521x 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, reverse polarity and

excessive inrush current. With integrated back-to-

back FETs, reverse current flow from output to input is

blocked at all times, making the device well suited for

systems which need load side energy hold up storage

in case input power supply fails.

Output current limit level can be set with a single

external resistor. It is also possible to get an accurate

sense of the output load current by measuring the

voltage drop across the current limit resistor.

Applications

with

particular

inrush

current

requirements can set the output slew rate with a

single external capacitor. Loads are protected from

input overvoltage conditions by clamping the output to

a safe fixed maximum voltage (pin selectable).

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.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

TPS2521xxRPW

QFN (10)

2 mm × 2 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

TPS25210x

IN

OUT

EN/UVLO

ILM

dVdt

GND

OVCSEL

PGTH

PG

ITIMER

Simplified Schematic

TPS2521

SLVSFX8 – MARCH 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.