LM25066 System Power Management and Protection IC with PMBus | TI.com

LM25066 (ACTIVE)

System Power Management and Protection IC with PMBus

System Power Management and Protection IC with PMBus - LM25066
 

Recommended alternative parts

  • LM25066A  -  System Power Management And Protection IC With PMBus
  • LM25069  -  Positive Low Voltage Power Limiting Hot Swap Controller
  • LM5066  -  High Voltage System Power Management And Protection IC With PMBus

Description

The LM25066 combines a high-performance hot-swap controller with a PMBus™ compliant SMBus/I2C interface 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 SMBus interface.

The LM25066 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 undervoltage and overvoltage levels and hysteresis are configurable, as well as the insertion delay time and fault detection time. A temperature monitoring block on the LM25066 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. LM25066 current measurement accuracy is ±2.4% over temperature.

The LM25066 monitoring block computes both the real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) 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.

Features

  • Input Voltage Range: 2.9 V to 17 V
  • 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
  • Current Measurement Accuracy: ±2.4% Over
    Temperature
  • Power Measurement Accuracy: ±3% 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
  • Blackbox Capture of Telemetry Measurements
    and Device Status Triggered by WARN or FAULT
    Condition
  • Full-Featured Application Design and
    Development GUI
  • 24-Lead WQFN Package

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Parametrics Compare all products in I2C/PMBus Monitors

 
Digital Interface
Current Measurement Accuracy (%)
Voltage Measurement Accuracy (%)
Power Measurement Accuracy (%)
Current Limit Threshold (Typ) (Ext FET=mV)
Current Limit Accuracy
Fault Response
Status Output
ON_OFF Control Input(s)
FET Protection
Features
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Vabsmax_cont (V)
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
LM25066
PMBus    
2.4    
1.4    
3    
25
46    
+/-8% @ 25 mV
+/-8% @ 46 mV    
Auto Retry
Latch Off
Via I2C    
PG    
OV
UV/EN    
SOA
Thermal    
Digital Temp Monitor
PMBus
Supports Telemetry Data Storage    
2.9    
17    
24    
Catalog    
-40 to 125    
WQFN    
24WQFN: 20 mm2: 4 x 5(WQFN)    

Featured tools and software

WEBENCH® Designer LM25066

  V in Lower V in Upper
2.90 ≤  V  V ≤ 17.00
Output Current Limit  Amps
Load Capacitance  uF
UVLO V
OVLO V
Ambient Temperature  °C ≤ 100°C