Product details


FET External Vin (Min) (V) 10 Vin (Max) (V) 80 Vabsmax_cont (V) 100 Current limit (Min) (A) 0.01 Current limit (Max) (A) 500 Overcurrent response Current limiting, Circuit breaker Fault response Auto Retry, Latch Off UL recognition open-in-new Find other eFuses & hot swap controllers

Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 9.7 x 4.4 open-in-new Find other eFuses & hot swap controllers


  • 10- to 80-V Operation
  • 100-V Continuous Absolute Max
  • 26 mV or 50 mV ILIM Threshold (±10%)
  • Programmable FET SOA Protection
  • Programable UV, OV, tFAULT Thresholds
  • External FET Temperature Sensing
  • Failed FET Detection
  • I2C / SMBus Interface
  • PMBus and Node Manager 2.0 and 3.0 Compliant Command Structure
  • Precision V IN, VOUT, IIN, PIN, VAUX Monitoring
    • V (±1.25%); I (±1.75%); P (±2.5%)
  • Supports Energy Monitoring via Read_EIN Command
  • Programable I/V/P Averaging Interval
  • 12-bit ADC with 1-kHz Sampling Rate
  • –40°C < TJ < 125°C Operation
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LM5066I provides robust protection and precision monitoring for 10- to 80-V systems. Programmable UV, OV, ILIMIT, and fast-short circuit protection allow for customized protection for any application. Programmable FET SOA protection sets the maximum power the FET is allowed to dissipate under any condition. The programmable fault timer (tFAULT) is set to avoid nuisance trips, ensure start-up, and limit the duration of over load events.

In addition to circuit protection, the LM5066I supplies real-time power, voltage, current, temperature, and fault data to the system management host through the I2C / SMBus interface. PMBus compliant command structure makes it easy to program the device. Precision telemetry enables intelligent power management functions such as efficiency optimization and early fault detection. LM5066I also supports advanced features such as I/V/P averaging and peak power measurment to improve system diagnostics.

LM5066I is pin-to-pin compatible with the LM5066 and offers improved telemetry accuracy and supports the Read_Ein command to monitor energy. See for a detailed comparison.

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Technical documentation

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Type Title Date
* Data sheet LM5066I 10 to 80 V, Hotswap Controller With I/V/P Monitoring and PMBus Interface datasheet (Rev. C) Jul. 20, 2016
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note Minimizing System Down-time with Smart eFuses Jun. 12, 2019
Technical article Simplify digital hot swap design using the PI-Commander GUI Jun. 06, 2016
Application note Handling System Transients in Hot Swap Applications May 08, 2015
Application note Robust Hot Swap Design (Rev. A) Apr. 08, 2015
User guide LM5066IEVM-626 Evaluation Module May 15, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The LM5066IEVM-626 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM5066I high-performance hot-swap controller with PMBUS compliant SMBUS/I2C interface to accurately measure, protect and control the electrical operating conditions of systems connected to a (...)

  •  High telemetry accuracy +/-1.25% current measurement and +/-1.75% power measurement accuracy.
  • Wide input voltage range: 10V-80V.
  • Fully node manager 2.0 and 2.5 compliant with I2C/SMBus interface and PMBus compliant command structure.
  • Remote temperature sensing with programmable warning and shutdown (...)

Software development

SLVC576.ZIP (238831 KB)
SLVC572.ZIP (14513 KB)

Design tools & simulation

SNVM587A.ZIP (127 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLVC577E.ZIP (720 KB)

CAD/CAE symbols

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HTSSOP (PWP) 28 View options

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