Overview
The LM25066A, produced by Texas Instruments, is a high-performance hot-swap controller designed to manage and protect the electrical operating conditions of computing and storage blades connected to a backplane power bus. This IC combines advanced power management with a PMBus™ compliant SMBus/I2C interface, enabling real-time monitoring and control of power, voltage, current, and temperature parameters. It is particularly suited for applications requiring precise power management and protection during hot-swapping operations.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.9 | - | 17 | V |
| VDD Voltage Range | 2.9 | - | 5.5 | V |
| Junction Temperature | -40 | - | 125 | °C |
| Current Limit Threshold | 25 mV / 46 mV | - | - | mV |
| Current Measurement Accuracy | -1% | - | 1% | % |
| Power Measurement Accuracy | -2% | - | 2% | % |
| ADC Resolution | - | 12 Bits | - | - |
| Package Type | - | 24-Lead WQFN | - | - |
Key Features
- 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
- True Input Power Measurement Using Simultaneous Sampling of VIN and IIN
- Averaging of VIN, IIN, PIN, and VOUT Over Programmable Interval Ranging from 0.001 to 4 Seconds
- Black Box Capture of Telemetry Measurements and Device Status Triggered by WARN or FAULT Condition
Applications
- Server Backplane Systems
- Basestation Power Distribution Systems
- Solid State Circuit Breakers
Q & A
- What is the input voltage range of the LM25066A?
The input voltage range of the LM25066A is from 2.9 V to 17 V.
- What interface does the LM25066A use for communication?
The LM25066A uses an I2C/SMBus interface and is PMBus compliant.
- What is the current measurement accuracy of the LM25066A?
The current measurement accuracy of the LM25066A is ±1% over temperature.
- Can the LM25066A detect damaged MOSFET conditions?
Yes, the LM25066A can detect and notify of damaged MOSFET conditions.
- What is the resolution of the ADC in the LM25066A?
The ADC resolution in the LM25066A is 12 bits.
- What is the package type of the LM25066A?
The LM25066A comes in a 24-Lead WQFN package.
- Does the LM25066A support remote temperature sensing?
Yes, the LM25066A supports remote temperature sensing with programmable warning and shutdown thresholds.
- Can the LM25066A average power readings over a programmable interval?
Yes, the LM25066A can average VIN, IIN, PIN, and VOUT over a programmable interval ranging from 0.001 to 4 seconds.
- What is the purpose of the black box function in the LM25066A?
The black box function captures and stores telemetry data and device status in the event of a warning or a fault.
- In which applications is the LM25066A commonly used?
The LM25066A is commonly used in server backplane systems, basestation power distribution systems, and solid state circuit breakers.
