LM25056A

LM25056A www.ti.com SNVS785A – JANUARY 2011 – REVISED APRIL 2013 LM25056A System Power Measurement IC with PMBus Check for Samples: LM25056A FEATURES 1 234 Input Voltage Range: 3V to 17V I2C/SMBus Interface with PMBus Compliant Command Structure Remote Temperature Sensing with Programmable Warning and Shutdown Thresholds Real Time Monitoring of VIN, IIN, PIN, VAUX with 12-bit Resolution and 1 kHz Sampling Rate Current Measurement Error: ±0.5%: +10°C to +85°C Voltage Measurement Error: ±1.0%: +10°C to+85°C Power Measurement Error: ±1.5%: +10°C to +85°C True Input Power Measurement Using Simultaneous Sampling of VIN and IIN Accurately Averages Dynamic Power Readings Averaging of VIN, IIN, PIN, and VAUX Over Programmable Interval Ranging from 0.001 to 4 Seconds User Programmable WARN and FAULT Thresholds with SMBA Notification Black Box Capture of Telemetry Measurements and Device Status Triggered by WARN and FAULT Conditions Full Featured Application Development Software WQFN-24 Package APPLICATIONS Server Backplane Systems Base Station Power Distribution Systems Subsystem Power Measurement DESCRIPTION The LM25056A combines high performance analog and digital technology with a PMBus™ compliant SMBus™/I2C interface to accurately measure the operating conditions of electrical systems including computing and storage blades connected to a backplane power bus. The LM25056A continuously supplies real-time power, voltage, current, and temperature da...