1FEATURES
2• Input Voltage Range: -10V to -80V
• Programmable 26 mV or 50 mV Current Limit
Threshold with Power Limiting (MOSFET
Power Dissipation Limiting)
• Real Time Monitoring of VIN, VOUT, IIN, PIN, VAUX
with 12-Bit Resolution and 1 kHz Sampling
Rate
• Configurable Circuit Breaker Protection for
Hard Shorts
• Configurable Under-Voltage and Over-Voltage
Protection
• Remote Temperature Sensing with
Programmable Warning and Shutdown
Thresholds
• Detection and Notification of Damaged
MOSFET Condition
• Power Measurement Accuracy: ±4.5% Over
Temperature
• True Input Power 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
• Black Box Capture of Telemetry
Measurements and Device Status Triggered by
WARN or FAULT Condition
• I2C/SMBus Interface and PMBus Compliant
Command Structure
• Full Featured Application Development
Software
• HTSSOP-28 Package

APPLICATIONS
• Base Station Power Distribution Systems
• Intelligent Solid State Circuit Breaker
• -24V/-48V Industrial Systems

DESCRIPTION
The LM5064 combines a high performance hot swap
controller with a PMBusTM compliant SMBus/I2C
interface to accurately measure, protect and control
the electrical operating conditions of systems
connected to a backplane power bus. The LM5064
continuously supplies real-time power, voltage,
current, temperature and fault data to the system
management host via the SMBus interface.
The LM5064 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 under-voltage and over-voltage
levels and hysteresis are configurable, as well as the
insertion delay time and fault detection time. A
temperature monitoring block on the LM5064
interfaces with a low-cost external diode for
monitoring the temperature of the external MOSFET
or other thermally sensitive components. The PGD
output provides a fast indicator when the input and/or
output voltages are outside their programmed ranges.
The LM5064 monitoring circuit 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.