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LM25066

ACTIVE

2.9-V to 17-V hot swap controller with PMBus

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Data sheet

LM25066

ACTIVE
Data sheet Order now

Product details

FET External Vin (min) (V) 2.9 Vin (max) (V) 17 Vabsmax_cont (V) 24 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 Current monitoring, Fault output, PMBus, Power good signal Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Function Adjustable current limit, Current monitoring, Inrush current control, Overvoltage protection, Power good signal, Short circuit protection, Thermal shutdown Quiescent current (Iq) (typ) (A) 0.0016 Quiescent current (Iq) (max) (A) 0.0004
FET External Vin (min) (V) 2.9 Vin (max) (V) 17 Vabsmax_cont (V) 24 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 Current monitoring, Fault output, PMBus, Power good signal Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Function Adjustable current limit, Current monitoring, Inrush current control, Overvoltage protection, Power good signal, Short circuit protection, Thermal shutdown Quiescent current (Iq) (typ) (A) 0.0016 Quiescent current (Iq) (max) (A) 0.0004
WQFN (NHZ) 24 20 mm² 5 x 4
  • Input Voltage Range: 2.9 V to 17 V
  • I2C/SMBus Interface and PMBus™ Compliant
    Command Structure
  • Programmable 25-mV or 46-mV Current Limit
    Threshold
  • Configurable Circuit Breaker Protection for Hard
    Shorts
  • Configurable Undervoltage and Overvoltage
    Lockouts With Hysteresis
  • Remote Temperature Sensing With
    Programmable Warning and Shutdown
    Thresholds
  • Detection and Notification of Damaged MOSFET
    Condition
  • Real-Time Monitoring of VIN, VOUT, IIN, PIN, VAUX
    With 12-bit Resolution and 1-kHz Sampling Rate
  • Current Measurement Accuracy: ±2.4% Over
    Temperature
  • Power Measurement Accuracy: ±3% Over
    Temperature
  • True Input Power Measurement Using
    Simultaneous Sampling of VIN and IIN Accurately
    Averages Dynamic Power Readings
  • Averaging of VIN, IIN, PIN, and VOUT Over
    Programmable Interval Ranging from 0.001 to
    4 Seconds
  • Programmable WARN and FAULT Thresholds
    With SMBA Notification
  • Blackbox Capture of Telemetry Measurements
    and Device Status Triggered by WARN or FAULT
    Condition
  • Full-Featured Application Design and
    Development GUI
  • 24-Lead WQFN Package
  • Input Voltage Range: 2.9 V to 17 V
  • I2C/SMBus Interface and PMBus™ Compliant
    Command Structure
  • Programmable 25-mV or 46-mV Current Limit
    Threshold
  • Configurable Circuit Breaker Protection for Hard
    Shorts
  • Configurable Undervoltage and Overvoltage
    Lockouts With Hysteresis
  • Remote Temperature Sensing With
    Programmable Warning and Shutdown
    Thresholds
  • Detection and Notification of Damaged MOSFET
    Condition
  • Real-Time Monitoring of VIN, VOUT, IIN, PIN, VAUX
    With 12-bit Resolution and 1-kHz Sampling Rate
  • Current Measurement Accuracy: ±2.4% Over
    Temperature
  • Power Measurement Accuracy: ±3% Over
    Temperature
  • True Input Power Measurement Using
    Simultaneous Sampling of VIN and IIN Accurately
    Averages Dynamic Power Readings
  • Averaging of VIN, IIN, PIN, and VOUT Over
    Programmable Interval Ranging from 0.001 to
    4 Seconds
  • Programmable WARN and FAULT Thresholds
    With SMBA Notification
  • Blackbox Capture of Telemetry Measurements
    and Device Status Triggered by WARN or FAULT
    Condition
  • Full-Featured Application Design and
    Development GUI
  • 24-Lead WQFN Package

The LM25066 combines a high-performance hot-swap controller with a PMBus™ compliant SMBus/I2C interface to accurately measure, protect and control the electrical operating conditions of computing and storage blades connected to a backplane power bus. The LM25066 continuously supplies real-time power, voltage, current, temperature and fault data to the system management host via the SMBus interface.

The LM25066 control block includes a unique hot-swap architecture that provides current and power limiting to protect sensitive circuitry during insertion of boards into a live system backplane, or any other hot power source. A fast acting circuit breaker prevents damage in the event of a short circuit on the output. The input undervoltage and overvoltage levels and hysteresis are configurable, as well as the insertion delay time and fault detection time. A temperature monitoring block on the LM25066 interfaces with a low-cost external diode for monitoring the temperature of the external MOSFET or other thermally sensitive components. The POWER GOOD output provides a fast indicator when the input and/or output voltages are outside their programmed range. LM25066 current measurement accuracy is ±2.4% over temperature.

The LM25066 monitoring block computes both the real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) as well as the peak power. Accurate power averaging is accomplished by averaging the product of the input voltage and current. A black box (Telemetry/Fault Snapshot) function captures and stores telemetry data and device status in the event of a warning or a fault.

The LM25066 combines a high-performance hot-swap controller with a PMBus™ compliant SMBus/I2C interface to accurately measure, protect and control the electrical operating conditions of computing and storage blades connected to a backplane power bus. The LM25066 continuously supplies real-time power, voltage, current, temperature and fault data to the system management host via the SMBus interface.

The LM25066 control block includes a unique hot-swap architecture that provides current and power limiting to protect sensitive circuitry during insertion of boards into a live system backplane, or any other hot power source. A fast acting circuit breaker prevents damage in the event of a short circuit on the output. The input undervoltage and overvoltage levels and hysteresis are configurable, as well as the insertion delay time and fault detection time. A temperature monitoring block on the LM25066 interfaces with a low-cost external diode for monitoring the temperature of the external MOSFET or other thermally sensitive components. The POWER GOOD output provides a fast indicator when the input and/or output voltages are outside their programmed range. LM25066 current measurement accuracy is ±2.4% over temperature.

The LM25066 monitoring block computes both the real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) as well as the peak power. Accurate power averaging is accomplished by averaging the product of the input voltage and current. A black box (Telemetry/Fault Snapshot) function captures and stores telemetry data and device status in the event of a warning or a fault.
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Technical documentation

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Type Title Date
* Data sheet LM25066 System Power Management and Protection IC With PMBus™ datasheet (Rev. J) PDF | HTML 06 Jan 2016
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
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Simplify digital hot swap design using the PI-Commander GUI PDF | HTML 06 Jun 2016
Technical article Building blocks of power PDF | HTML 23 Mar 2016
Technical article Simplify robust hot-swap design using design calculator tools PDF | HTML 04 Mar 2016
Selection guide Hot Swap Selection Tool 28 Jul 2015
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 AN-2100 LM25066 Evaluation Board (Rev. C) 26 Apr 2013
User guide AN-2160 LM5066 Evaluation Board (Rev. A) 26 Apr 2013

Design & development

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

Evaluation board

LM25066EVK — Evaluation Board for the LM25066

The LM25066EVK evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM25066 hot-swap controller with PMBUS compliant SMBUS/I2C interface to accurately measure, protect and control the electrical operating conditions of systems connected to a backplane power bus. The (...)

User guide: PDF
Not available on TI.com
GUI for evaluation module (EVM)

PMBUSMGRGUI-SW — LM25066, LM5066, LM5064, LM25056 PMBus Manager GUI

Companion GUI for evaluation boards supporting: LM25066, LM5066, LM5064 Hot Swap + telemetry devices and the LM25056 telemetry-only device

Supported products & hardware

Supported products & hardware

Products
eFuses & hot swap controllers
LM25066 — 2.9-V to 17-V hot swap controller with PMBus LM25066I — 2.9-V to 17-V hot swap controller with I2C and PMBus with Intel node manager 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
Digital power monitors
LM25056 — 3 to 17V, 12-bit, pmbus output current/voltage/power/temperature monitor
Hardware development
Evaluation board
LM5066EVK — LM5066 Evaluation Kit
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
Download
Support software

SNVU310 — LM25066 Design Calculator

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
Download
Calculation tool

SNVR505 — LM25066 Design Calculator With FET Recommendation

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
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.
Download
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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Package Pins CAD symbols, footprints & 3D models
WQFN (NHZ) 24 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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