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
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
HTSSOP (PWP) 28 43 mm² 9.7 x 4.4
  • 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
  • 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

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.

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) 20 Jul 2016
E-book 11 Ways to Protect Your Power Path white paper 03 Jul 2019
Application note Minimizing System Down-time with Smart eFuses 12 Jun 2019
Technical article Simplify digital hot swap design using the PI-Commander GUI 06 Jun 2016
Application note Handling System Transients in Hot Swap Applications 08 May 2015
Application note Robust Hot Swap Design (Rev. A) 08 Apr 2015
User guide LM5066IEVM-626 Evaluation Module 15 May 2014

Design & development

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

Evaluation board

LM5066IEVM-626 — LM5066IEVM-626 Evaluation Module with PMBus

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 (...)

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Driver or library

LGPL Library Source Used by PI-Commander

SLVC576.ZIP (238831 KB)
GUI for evaluation module (EVM)

PI-Commander EVM GUI

SLVC572.ZIP (14513 KB)
Simulation model

LM5066I Unencrypted PSpice Transient Model Package (Rev. A)

SNVM587A.ZIP (127 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Calculation tool

LM5066I Design Calculator (Rev. E)

SLVC577E.ZIP (720 KB)
Calculation tool

LM5066I Design Calculator With FET Recommendation

SNVR507.ZIP (492 KB)
Package Pins Download
HTSSOP (PWP) 28 View options

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