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LM5066I

ACTIVE

10-V to 80-V hot swap controller with improved current, voltage and power monitoring accuracy

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Data sheet

LM5066I

ACTIVE
Data sheet Order now

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 Circuit breaker, Current limiting Fault response Auto-retry, Latch-off Soft start Adjustable Overvoltage response Cut-off Features Adjustable OVLO, Current monitoring, Fault output, Overvoltage protection, PMBus, Power good signal, Short circuit protection, adjustable UVLO Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Quiescent current (Iq) (typ) (A) 0.0056 Quiescent current (Iq) (max) (A) 0.007
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 Circuit breaker, Current limiting Fault response Auto-retry, Latch-off Soft start Adjustable Overvoltage response Cut-off Features Adjustable OVLO, Current monitoring, Fault output, Overvoltage protection, PMBus, Power good signal, Short circuit protection, adjustable UVLO Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Quiescent current (Iq) (typ) (A) 0.0056 Quiescent current (Iq) (max) (A) 0.007
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • 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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Type Title Date
* Data sheet LM5066I 10 to 80 V, Hotswap Controller With I/V/P Monitoring and PMBus Interface datasheet (Rev. C) PDF | HTML 20 Jul 2016
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Analog Design Journal 에너지 계량 시 절연 전류 감지를 위한 신 호 체인 비용 및 정확도 최적화 PDF | HTML 23 May 2025
Analog Design Journal 핫 스왑 컨트롤러를 사용하여는 48V AI 서버의 보호 문제 해결 PDF | HTML 23 May 2025
Analog Design Journal 견고하고 안정적인 전원 경로 보호를 달 성하기 위한 전원 스위치 과도 보호 설계 PDF | HTML 07 May 2025
Analog Design Journal Addressing the protection challenges of 48V AI servers using hot-swap controllers PDF | HTML 05 May 2025
Analog Design Journal Optimizing signal chain cost and accuracy for isolated current sensing in energy metering PDF | HTML 30 Apr 2025
Analog Design Journal Transient protection design for power switches to achieve robust reliable power-path protection PDF | HTML 23 Apr 2025
Application note Implementation of PSYS Monitor Using TPS25984, TPS25985, or TPS25990 eFuses PDF | HTML 15 Nov 2023
E-book 11 Ways to Protect Your Power Path 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 PDF | HTML 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 (...)

User guide: PDF
Not available on TI.com
Driver or library

SLVC576 — LGPL Library Source Used by PI-Commander

Supported products & hardware

Supported products & hardware

Products
eFuses & hot swap controllers
LM5066I — 10-V to 80-V hot swap controller with improved current, voltage and power monitoring accuracy
Power sourcing equipment
TPS23861 — 2-pair, type-2, 4-channel PoE PSE with autonomous mode
Download
GUI for evaluation module (EVM)

SLVC572 — PI-Commander EVM GUI

Supported products & hardware

Supported products & hardware

Products
eFuses & hot swap controllers
LM25066 — 2.9-V to 17-V hot swap controller with PMBus LM25066A — 2.9-V to 17-V hot swap controller with I2C and PMBus with increased monitoring accuracy LM25066I — 2.9-V to 17-V hot swap controller with I2C and PMBus with Intel node manager LM25066IA — 2.9-V to 17-V hot swap controller with I2C and PMBus - increased monitoring accuracy and intel node LM5064 — -10-V to -80-V hot swap controller with PMBus LM5066 — 10-V to 80-V hot swap controller with current, -Voltage and power monitoring and PMBus LM5066I — 10-V to 80-V hot swap controller with improved current, voltage and power monitoring accuracy
Power sourcing equipment
TPS23861 — 2-pair, type-2, 4-channel PoE PSE with autonomous mode
Hardware development
Evaluation board
LM5056EVM — LM5056 High Voltage System Power Management IC Evaluation Module TPS23861EVM-612 — TPS23861EVM-612 Evaluation Module for Quad IEEE 802.3at PoE PSE Controller
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Simulation model

LM5066I Unencrypted PSpice Transient Model Package (Rev. A)

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

SLVC577 — LM5066I Design Calculator

Supported products & hardware

Supported products & hardware

Products
eFuses & hot swap controllers
LM5066I — 10-V to 80-V hot swap controller with improved current, voltage and power monitoring accuracy
Download
Calculation tool

SNVR507 — LM5066I Design Calculator With FET Recommendation

Supported products & hardware

Supported products & hardware

Products
eFuses & hot swap controllers
LM5066 — 10-V to 80-V hot swap controller with current, -Voltage and power monitoring and PMBus LM5066I — 10-V to 80-V hot swap controller with improved current, voltage and power monitoring accuracy
Download
Calculation tool

TVS-RECOMMENDATION-CALC — TVS diode recommendation tool

This tool suggests suitable TVS for given system parameters and abs max voltage rating of the device.
Supported products & hardware

Supported products & hardware

This design resource supports most products in these categories.

Check the product details page to verify support.
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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 (...)
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Reference designs

PMP23496 — 8kW hot-swap reference design for 48V artificial intelligence servers

With the advancements in artificial intelligence (AI) and machine learning (ML), enterprise servers have become power-intensive as these servers simultaneously process a large amount of data and storage. The steady-state power rating of each server motherboard has gone up 5kW to 6kW, in contrast to (...)
Test report: PDF
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HTSSOP (PWP) 28 Ultra Librarian
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