1 Features
• 4.2-V to 42-V operating voltage, 45-V absolute
maximum
• Integrated reverse input polarity protection down to
–42 V
– Zero additional components required
• Integrated back to back MOSFETs with 150-mΩ
total RON
• 0.1-A to 2.23-A adjustable current limit (±5%
accuracy at 1 A)
• Load protection during surge (IEC 61000-4-5) with
suitable TVS
• IMON current indicator output (±8.5% accuracy)
• Low quiescent current, 300-μA in operating, 20-μA
in shutdown
• Adjustable UVLO, OVP cut off, output slew rate
control
• Reverse current blocking
• Available in easy-to-use 16-pin HTSSOP and 24-
pin VQFN packages
• Selectable current-limiting fault response options
(auto-retry, latch off, circuit breaker modes)

2 Applications
• HMI power protection in factory automation
• Fire safety systems
• Electronic thermostats and video doorbells
• Industrial PCs
• Elevators

3 Description
The TPS26400 devices are compact, feature rich
high voltage eFuses with a full suite of protection
features. The wide supply input range of 4.2 to 42
V allows control of many popular DC bus voltages.
The device can withstand and protect the loads from
positive and negative supply voltages up to ±42
V. Integrated back to back FETs provide reverse
current blocking feature making the device suitable
for systems with output voltage holdup requirements
during power fail and brownout conditions. Load,
source and device protection are provided with many
adjustable features including overcurrent, output slew
rate and overvoltage, undervoltage thresholds. The
internal robust protection control blocks along with the
high voltage rating of the TPS26400 helps to simplify
the system designs for Surge protection.
A shutdown pin provides external control for enabling
and disabling the internal FETs as well as placing the
device in a low current shutdown mode. For system
status monitoring and downstream load control, the
device provides fault and precise current monitor
output. The MODE pin allows flexibility to configure
the device between the three current-limiting fault
responses (circuit breaker, latch off, and Auto-retry
modes).
The device is available in a 5-mm × 4.4-mm 16-pin
HTSSOP as well as 5-mm x 4-mm 24-pin VQFN
package and are specified over a –40°C to +125°C
temperature range