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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 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

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