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Analog Devices ADM1171-2AUJZ-RL7 — Logic ICs

ADM1171-2AUJZ-RL7 Hot Swap Controller, I²C, TSOT-23-8

MPNADM1171-2AUJZ-RL7
End of Life

Analog Devices ADM1171-2AUJZ-RL7 hot swap controller, single channel, 2.7V–16.5V supply, 650 µA supply current, I²C interface, latched fault, UVLO, programmable current limit and fault timeout, TSOT-23-8 package, -40°C to 85°C.

$6.1Ref. price · indicative, final on quote
Analog Devices ADM1171-2AUJZ-RL7 datasheet (PDF)
PackagingSOT-23-8 Thin, TSOT-23-8
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ADM1171-2AUJZ-RL7 specifications
ParameterValue
TypeHot Swap Controller
MountingSurface Mount
Supply voltage2.7V ~ 16.5V
Current - supply650 µA
Operating temperature-40°C ~ 85°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesI²C, Latched Fault, UVLO
ApplicationsGeneral Purpose
CaseSOT-23-8 Thin, TSOT-23-8
Internal switchNo
Channels1
Programmable featuresCurrent Limit, Fault Timeout, Turn On Voltage

Product details

Hot swap controller with I²C fault reporting

It integrates an I²C interface for fault reporting and a latched fault output, plus under-voltage lockout (UVLO) to prevent operation below the supply threshold. The part operates from 2.7 V to 16.5 V and draws 650 µA quiescent current — low enough to keep the power budget tight in multi-rail systems. Programmable current limit, fault timeout, and turn-on voltage let you tune the inrush and fault response without external components beyond the sense resistor and pass FET.

No internal switch — external FET required

This controller has no internal pass switch; it drives an external N-channel MOSFET. That means the current rating is set by the FET and sense resistor you choose, not by the controller itself.

Frequently asked questions

What is the difference between ADM1171-2AUJZ-RL7 and ADM1176-2ARMZ-R7?

The ADM1176-2ARMZ-R7 adds current and voltage monitoring via I²C, while the ADM1171 is a pure hot swap controller without monitoring. Both are single-channel, use an external FET, and share the same programmable features. Choose the ADM1176 if you need telemetry; the ADM1171 is the lower-cost option when monitoring is not required.

Can ADM1171-2AUJZ-RL7 be used with 3.3V logic?

Yes, the I²C interface operates within the 2.7 V to 16.5 V supply range, so 3.3 V logic is compatible. The I²C pins are open-drain and pull up to the supply rail or a separate 3.3 V rail as long as the voltage does not exceed the supply maximum.

What is the I²C address configuration for ADM1171-2AUJZ-RL7?

The ADM1171-2AUJZ-RL7 uses a fixed 7-bit I²C address. The exact address is specified in the datasheet; it is not user-programmable via pins. Verify the address against your bus map before layout.

What is the closest functional equivalent or replacement for ADM1171-2AUJZ-RL7?

The ADM1176-2ARMZ-R7 is a functional superset that adds current and voltage monitoring. For a pin-compatible controller without monitoring, the ADM4210-2AUJZ-RL7 is a similar single-channel hot swap controller in the same TSOT-23-8 package, though it lacks the I²C interface. Verify pin compatibility against the datasheet before substituting.