1 Features
• Input operating voltage range: 9V to 80V
– 92V absolute maximum
– Withstands negative voltages up to –5V at
output
• Integrated FET with low on-resistance: RON =
3.65mΩ (typ)
• Active high enable input with adjustable
undervoltage lockout (UVLO)
• Adjustable overvoltage protection
• Supports parallel connection of multiple eFuses
with device state synchronization and load sharing
during start-up and steady state
• Adjustable output slew rate control (dVdt) for
inrush current protection
• Precise load current monitoring
– <3% error for over 50-100% of max current
– 1MHz bandwidth
• Robust overcurrent protection
– Circuit-breaker response
– Adjustable threshold: 2A to 20A
– Overcurrent protection accuracy: ±3%
– Adjustable transient overcurrent timer (ITIMER)
to support peak currents
• Fast-trip response to short-circuit events
• Overtemperature protection (OTP) with analog die
temperature monitor output (TEMP)
• FET health monitoring and reporting
• Fault indication pin (FLT )
• Power Good indication pin (PGOOD)
• Small footprint: QFN 6mm × 5mm
– IPC9592B clearance for 60V

2 Applications
• Input hotswap and hotplug
• Server and high performance computing
• Network interface cards
• Graphics and hardware accelerator cards
• Data center switches and routers
• Fire alarm control panel

3 Description
The TPS1685x is an integrated high current circuit
protection and power management device. The
device provides multiple protection modes using very
few external components and is a robust defense
against overloads, short-circuits and excessive inrush
current. Applications with particular inrush current
requirements can set the output slew rate with a
single external capacitor. Output current limit level
can be set by user as per system needs. A
user adjustable overcurrent blanking timer allows
systems to support transient peaks in the load
current without tripping the eFuse. An integrated
fast and accurate sense analog load current monitor
facilitates predictive maintenance and advanced
dynamic platform power management such as Intel®
PSYS and PROCHOT to optimize server and datacenter
performance.
Multiple TPS1685x devices can be connected in
parallel to increase the total current capacity for high
power systems. All devices actively synchronize their
operating state and share current during start-up as
well as steady state to avoid over-stressing some of
the devices which can result in premature or partial
shutdown of the parallel chain.
An integrated fast and accurate sense analog load
current monitor facilitates predictive maintenance
and advanced dynamic platform power management
techniques such as Intel® PSYS and PROCHOT#
to maximize system throughput and power supply
utilization.
The devices are characterized for operation over a
junction temperature range of –40°C to +125°C.