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.