GUI for evaluation module (EVM)
LM25066A
2.9-V to 17-V hot swap controller with I2C and PMBus with increased monitoring accuracy
Data sheet
LM25066A
- 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: ±1% Over Temperature
- Power Measurement Accuracy: ±2% 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
- Black Box Capture of Telemetry Measurements and Device Status Triggered by WARN or FAULT Condition
- 24-Lead WQFN Package
The LM25066A 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 LM25066A continuously supplies real-time power, voltage, current, temperature and fault data to the system management host via the SMBus interface.
The LM25066A 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 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 LM25066A 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. LM25066A current measurement accuracy is ±1% over temperature.
The LM25066A 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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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM25066A System Power Management and Protection IC With PMBus™ datasheet (Rev. G) | PDF | HTML | 11 Nov 2016 |
| Application note | Basics of Power Switches (Rev. A) | PDF | HTML | 26 Apr 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 | |
| Application note | Robust Hot Swap Design (Rev. A) | 08 Apr 2015 | ||
| User guide | AN-2100 LM25066 Evaluation Board (Rev. C) | 26 Apr 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Support software
SNVU310 — LM25066 Design Calculator
Supported products & hardware
Products
eFuses & hot swap controllers
Simulation model
LM25066A Unencrypted PSpice Transient Model Package (Rev. A)
SNVM476A.ZIP (62 KB) - PSpice Model
Calculation tool
SNVR505 — LM25066 Design Calculator With FET Recommendation
Supported products & hardware
Products
eFuses & hot swap controllers
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
This design resource supports most products in these categories.
Check the product details page to verify support.
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parametric-filter eFuses & hot swap controllers
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (NHZ) | 24 | Ultra Librarian |
Ordering & quality
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