Power & Thermal Monitoring Selector Card Datasheet by Analog Devices Inc.

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“Knowledge is power,” which is especially true at the board level of many electronic applications. Knowledge of key system
parameters provides valuable feedback and allows users to monitor the health of a system and make intelligent decisions. From
input voltage to the temperature of an FPGA, these key metrics help determine whether a system is operating correctly, efficiently
or even dangerously. We offer various types of monitoring ICs—from Hot Swap controllers with built-in monitoring capabilities to
dedicated power and temperature monitors.
Linear Technology Every Trace of the Way
Power and Thermal Monitoring
Current: Our current monitoring ICs implement a high side differential current sensing scheme to
avoid the pitfalls of low side sensing by using special amplifiers and ADCs, providing users with
inrush and operational current insight, improved diagnostic capabilities and maintenance of ground
path integrity.
Voltage: Our voltage monitoring ICs provide single-ended or differential measurements with up
to 0.04% accuracy of voltages ranging from –100V to 80V, allowing users to monitor virtually any
input, bus or core voltage in a system and take proactive or reactive measures against drifting or
failing rails.
Power: Our power monitoring ICs integrate an accurate multiplier to alleviate the host of multiplying
current and voltage data, and provide users with average or instantaneous power readings. Features
like an analog or digital interface, high voltage capabilities, and up to 1.5% accuracy simplify part
selection.
Temperature: Our temperature monitoring ICs provide up to ±0.25°C accurate digital or analog
readings of internal (die) or external (diode) temperature, allowing users to easily and cost-effectively
implement board or component temperature sensing schemes for system health assessment or
application-specific purposes.
Coulombs: Our coulomb counting ICs provide 1% accurate charge readings, with optional readings
of temperature and voltage, so users are equipped with the fundamental parameters required to
implement custom battery profiles and accurately assess the most treasured parameter in battery
gas gauging applications – state of charge (SoC).
Energy: Our energy monitoring ICs provide 1% accurate energy measurements, with optional
readings of voltage, current, temperature, power and coulombs, to alleviate the host of burdensome
calculations, while staying “greenˮ.
Up to
60VIN
Current Limit
Q
P
I × V
125°C
–55°C
FPGA
HOT SWAP CONTROLLER
WITH CURRENT AND
VOLTAGE MONITORING
LT C ®4260
DC/DC
CONTROLLER
WITH PMBus
LTC3880
POWER
AND ENERGY
MONITOR
LTC2946
VOLTAGE, CURRENT
AND TEMPERATURE
MONITOR
LTC2990
DC/DC
VINPUT
VCORE
Key System Parameters
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and isoSPI is a
trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners.
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Power and Thermal Monitoring
Device Type
Part
Number
Monitored Parameters
Supply Range Interface DescriptionVoltage Current Temp Power Charge Energy
Hot Swap
Controllers
LTC4215 • • 2.9V to 15V I2CHot Swap Controller with 8-Bit Monitoring
LTC4217 • • 2.9V to 26.5V Current 2A Hot Swap Controller
LTC4218 • 2.9V to 26.5V Current Hot Swap Controller
LTC4222 • • 2.9V to 29V I2CDual Hot Swap Controller with 10-Bit Monitoring
LTC4232 • • 2.9V to 15V Current 5A Hot Swap Controller
LTC4233 • • 2.9V to 15V Current 10A Hot Swap Controller
LTC4234 • • 2.9V to 15V Current 20A Hot Swap Controller
LTC4260 • • 8.5V to 80V I2CHot Swap Controller with 8-Bit Monitoring
LTC4261 • • –12V to –100V I2CHot Swap Controller with 10-Bit Monitoring
LTC4281 • • • • • 2.9V to 33V I2CHot Swap Controller with 12/16-Bit Monitoring
LTC4282 • • • • • 2.9V to 33V I2CSOA Sharing Hot Swap Controller with 12/16-Bit Monitoring
Power Monitors
LT2940 † • 4V to 80V Current 500kHz Power and Current Monitor
LTC2945 • • • 0V to 80V I2CHigh Voltage Rail-to-Rail Power Monitor
LTC2946 • † • • • 0V to 100V I2CHigh Voltage Rail-to-Rail Power and Energy Monitor
LTC2947 • † • • † • 0V to 15V I2C/SPI 30A Rail-to-Rail Power and Energy Monitor
LTC2992 • • • 0V to 100V I2CDual High Voltage Rail-to-Rail Power and Energy Monitor
LTC4151 • • 7V to 80V I2CHigh Voltage Current and Voltage Monitor
Temperature
Monitors
LTC2990 • • • 3V to 5.5V I2CQuad Voltage, Current and Temperature Monitor
LTC2991 • • • 3V to 5.5V I2COctal Voltage, Current and Temperature Monitor
LTC2995 • • 2.25V to 5.5V Voltage Temperature Sensor and Dual Voltage Monitor
LTC2996 • 2.25V to 5.5V Voltage Temperature Sensor with Alerts
LTC2997 • 2.5V to 5.5V Voltage Temperature Sensor
Power System
Managers
LTC2970 • † • 4.5V to 15V I2C2-Channel Power System Manager
LTC2974 • † • • 3.13V to 15V I2C/PMBus 4-Channel Power System Manager with EEPROM
LTC2975 • † • • • 3.13V to 15V I2C/PMBus 4-Channel Power System Manager with EEPROM
LTC2977 • † • 3.13V to 15V I2C/PMBus 8-Channel Power System Manager with EEPROM
LTC2980 • † • 3.13V to 15V I2C/PMBus 16-Channel Power System Manager with EEPROM
LTM2987 • † • 3.13V to 15V I2C/PMBus 16-Channel µModule Power System Manager with EEPROM
Power Supply
Controllers/
Monolithic
LTC3882 • • • 3V to 38V I2C/PMBus Dual Voltage Mode DC/DC Controller with EEPROM
LTC3883 • • • 4.5V to 24V I2C/PMBus Single DC/DC Controller with EEPROM
LTC3884 • • • • 4.5V TO 38V I2C/PMBus Dual Output Mode DC/DC Controller with EEPROM and SubMilliohm DCR Sensing
LTC3815 • • • 2.25V to 5.5V I2C/PMBus 6A Monolithic DC/DC Step-Down
LTC3887 • • • 4.5V to 24V I2C/PMBus Dual Current Mode DC/DC Controller with EEPROM
LTC3886 • • • • 4.5V to 60V I2C/PMBus Dual Current Mode DC/DC Controller with EEPROM
Battery Gas
Gauges
LTC2941 • 2.7V to 5.5V I2CBattery Gas Gauge
LTC2942 • • • 2.7V to 5.5V I2CBattery Gas Gauge with Temperature & Voltage Measurement
LTC2943 • † • † 3.6V to 20V I2CMulticell Battery Gas Gauge
LTC2944 • † • † 3.6V to 60V I2CMulticell Battery Gas Gauge
LTC4150 † 2.7V to 8.5V Logic Battery Gas Gauge
Battery Stack
Monitors
LTC6801 • • 10V to 50V Logic Multicell Battery Stack Fault Monitor
LTC6803 • • 10V to 55V SPI Multicell Battery Stack Monitor with 0.25% Accuracy
LTC6804 • • 11V to 55V SPI/isoSPI Multicell Battery Stack Monitor with 0.067% Accuracy
LTC6811 • • 11V to 55V SPI/isoSPI™ Multicell Battery Stack Monitor with 0.067% Accuracy
Battery Chargers
LTC4015 • • • • 4.5V to 35V I2CMulti-Chemistry Buck with Digital Telemetry System
†
This parameter can be measured bidirectionally. Refer to data sheet for more details.
1017C
www.linear.com/powermonitors n 1-800-4-LINEAR

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