LM25056

ACTIVE

3 to 17V, 12-bit, pmbus output current/voltage/power/temperature monitor

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Product details

Parameters

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Package | Pins | Size

WQFN (NHZ) 24 20 mm² 5 x 4 open-in-new Find other Current/voltage/power monitors

Features

  • 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
  • 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

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Description

The LM25056 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 LM25056 continuously supplies real-time power, voltage, current, and temperature data to the system management host via the SMBus interface.

The LM25056 monitoring block captures both real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VAUX) as well as peak power. Accurate power measurement is accomplished by measuring the product of the input voltage and current through a shunt resistor. LM25056 current measurement has a ±1.5% accuracy over the temperature range of -40°C to +85°C with operation from -40°C to +125°C. 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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Technical documentation

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No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet System Power Measurement IC with PMBus datasheet (Rev. A) Apr. 05, 2013
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
Selection guides Hot Swap Selection Tool Jul. 28, 2015
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015
User guides AN-2144 LM25056 Evaluation Board Jan. 16, 2012

Design & development

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Hardware development

EVALUATION BOARDS Download
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HOTSWAP-EFUSECALCULATORS
Description

 

Creating a Hot Swap and/or eFuse design can involve complex formulas and calculations. Simplify the process by entering system requirements such as input voltage range, current, and output capacitance and the calculator will guide the user towards developing a robust design.  The tool may also (...)

Design tools & simulation

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PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
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SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

Reference designs

REFERENCE DESIGNS Download
30A SIMPLE SWITCHER® Power Module with 3 to 14.5V Reference Design with PMBus
PMP9464 The reference design PMP9464 utilizes the LMZ31530, a 30A SIMPLE SWITCHER® Power Module. The LMZ31530 SIMPLE SWITCHER® power module is an easy-to-use integrated power solution that combines a 30-A DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low profile, QFN package.

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Package Pins Download
WQFN (NHZ) 24 View options

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