Features Operating range: +2.9V to +17V Current Limit Threshold: 25 mV or 50 mV I 2C/SMBus interface and PMBus compliant command structure Real time system telemetry monitoring Current measurement accuracy: ±3%, 25 mV threshold, -40°C to 125°C True Input Power from simultaneous sampling of VIN and IIN Power limited control of hotswap insertions, inrush current, circuit breaker functions Multi-level configuration and monitoring of system fault conditions via PMBus Full featured application design and development software Description The LM25066 combines high performance analog and digital technology 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 I2C/SMBus interface with PMBus compliant protocol. The LM25066 monitoring block captures peak power and computes the average of subsystem operating parameters (Vin, Iin, Pin, Vout). LM25066 current measurement is ±3% accurate over the operating temperature range of -40°C to 125°C. The LM25066 protection block utilizes provides adjustable under/overvoltage and hysteresis. A temperature monitoring block on the LM25066 interfaces with a low-cost external diode for monitoring the temperature of the external MOSFET or other critical temperature source. The temperature sensor can be used to protect against MOSFET overheating. The LM25066 reports the status of all system warning and fault conditions and offers programmable warning thresholds through the SMBus interface. This feature provides design flexibility and dynamic system protection. The LM25066 control block includes unique hot-swap architecture that provides current and power limiting to protect sensitive circuitry during insertion of boards from a live system backplane, or any other "hot" power source. Applications Server Backplane Systems Base Station Power Distribution Systems Solid State Circuit Breaker

	Block Diagram click for larger image

Datasheets

Title		Size	Date	Other Language
	LM25066 System Power Management and Protection IC with PMBus	151 Kbytes	19-Feb-10

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM25066PSQ/NOPB RoHS Status	LLP	Preliminary Lead Time: N/A	Contact your distributor	CALL	reel of N/A
LM25066PSQX/NOPB RoHS Status	LLP	Preliminary Lead Time: N/A	Contact your distributor	CALL	reel of N/A

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A