The LM25066A combines a high performance hot-swap controller with a PMBus ™ compliant SMBus/I 2C 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 "hot" power source. A fast acting circuit breaker prevents damage in the event of a short circuit on the output. The input under-voltage and over-voltage 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 (V_IN, I_IN, P_IN, V_OUT) 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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Input voltage range: 2.9V to 17V

I 2 C/SMBus interface and PMBus compliant command structure

Programmable 25mV or 46mV current limit threshold

Configurable circuit breaker protection for hard shorts

Configurable under-voltage and over-voltage 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 LLP package

• 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

LM25066A的完整型号有：LM25066APSQ/NOPB、LM25066APSQE/NOPB、LM25066APSQX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM25066APSQ/NOPB，工作温度：-40 to 125，封装：WQFN (NHZ)-24，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM25066APSQ/NOPB的批量USD价格：2.357（1000+）

LM25066APSQE/NOPB，工作温度：-40 to 125，封装：WQFN (NHZ)-24，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM25066APSQE/NOPB的批量USD价格：2.357（1000+）

LM25066APSQX/NOPB，工作温度：-40 to 125，封装：WQFN (NHZ)-24，包装数量MPQ：4500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM25066APSQX/NOPB的批量USD价格：1.964（1000+）

PI-Commander EVM GUI

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LM25066 Design Calculator With FET Recommendation

完整的 PMBus 电力系统，可以为 3 个 ASIC/FPGA 内核、DDR3 内核内存供电，并为高性能以太网交换机提供辅助电压。