1FEATURES

2• Fully Node Manager 2.0 and 2.5 Compliant with

I2C/SMBus interface and PMBus™ compliant

command structure

• Input voltage range: 2.9V to 17V

• Programmable 25mV or 46mV current limit

threshold

• Read_EIN accurately measures true input

power via simultaneous sampling

• Configurable circuit breaker protection for

hard shorts

• Configurable under- and over-voltage lockouts

with hysteresis

• Real time monitoring of VIN, VOUT, IIN, PIN, VAUX

with 12-bit resolution and 1 kHz sampling rate

• Current measurement accuracy: ±1%

(LM25066IA) and Power measurement

accuracy: ±2.0% (LM25066IA) over temperature

• 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

• 24-lead WQFN package

APPLICATIONS

• Server backplane systems

• Basestation power distribution systems

• Solid state circuit breaker (eFuse)

DESCRIPTION

While the LM25066I/A is functionally similar to the

LM25066/A, the LM25066I/A is fully compliant to Intel

Node Manager 2.0, 2.5 and adds the READ_EIN

energy accumulator feature. The LM25066I/A

combines a high-performance hot-swap controller

with a PMBus 1.2™ compliant SMBus/I2C interface to

accurately measure, control and protect the electrical

operating conditions of critical systems. The

LM25066I/A continuously supplies real-time power,

voltage, current, temperature, and fault data to the

system management host via the SMBus interface.

The LM25066I/A control block includes a unique hot-

swap architecture that provides current and power

limiting to protect sensitive circuitry even during the

most stressful conditions. A fast-acting circuit breaker

prevents damage in the event of a short circuit on the

output. The input under-voltage, over-voltage hysteresis, insertion delay time and fault detection

time are all configurable. A temperature monitoring

block on the LM25066I/A interfaces with a low-cost

external diode for continuous temperature

assessment of the external MOSFET or other thermal

sensitive components. The POWER GOOD output

provides a fast alert when the input and/or output voltages are outside their programmed range.

Accurate power readings are accomplished by using

the READ_EIN command. A black box

(Telemetry/Fault Snapshot) function captures and

stores telemetry data and device status in the event

of a warning or a fault.