LTC2945CUD-1#PBF

Power Supply Controllers, Monitors Overview

The LTC2945CUD-1#PBF is a rail-to-rail bidirectional current and power monitor manufactured by Analog Devices Inc. It measures current, voltage, and power with an operating input range of 2.7V to 80V. The device features high-side sensing and includes an integrated shunt regulator for supplies exceeding 80V, allowing flexible input selection. It communicates via an I2C interface and is housed in a 12-pin QFN EP package. Designed for industrial and automotive applications, it operates within a temperature range of -40°C to +85°C.

Power Supply Controllers, Monitors Feature Summary

• Rail-to-rail system monitoring capability for measuring current, voltage, and power across wide input ranges.
• Integrated shunt regulator enables operation with input supplies above 80V for flexible power source selection.
• High-side current sensing architecture supports accurate bidirectional measurement.
• I2C communication interface facilitates data transfer to host controllers.

Power Supply Controllers, Monitors Applications

• -48V system power monitoring using external linear regulators
• Wide-range dual supply monitoring
• Harsh environment power monitoring with transient tolerance

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm the C grade temperature rating (-40°C to +85°C) matches the application requirements. Ensure the 12-pin QFN EP package footprint aligns with the PCB design. Check for RoHS compliance documentation if required by regulatory standards.

Power Supply Controllers, Monitors Selection Notes

Select this component for applications requiring precise measurement of current, voltage, and power in systems with inputs up to 80V. The integrated shunt regulator is beneficial for handling higher voltage sources without additional external regulation components. Consider the I2C interface compatibility with the host microcontroller or processor.

Power Supply Controllers, Monitors Part Context

This part belongs to the LTC2945 series of wide-range power monitors from Analog Devices. The series offers rail-to-rail monitoring solutions suitable for various industrial and automotive environments. The CUD-1 variant specifically denotes the commercial temperature grade and the specific package configuration.

Power Supply Controllers, Monitors Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers within the LTC2945 family or compatible PMIC series. Verify pinout and electrical parameter compatibility before substitution.