Packaging information
| Package | Pins WQFN (NHZ) | 24 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 1,000 | SMALL T&R |
Features for the LM25066
- 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
Description for the LM25066
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.