LTC3873ITS8-5#TRPBF

DC DC Switching Controllers Overview

The LTC3873ITS8-5#TRPBF is a constant frequency current mode DC/DC controller designed for boost, flyback, and SEPIC topologies. It operates with an input voltage range of 4 V to 75 V and supports output voltages from 1.2 V to 60 V. The device features a fixed switching frequency of 200 kHz and draws a typical operating supply current of 300 uA. It provides load regulation of 0.05% and functions within a temperature range of -40°C to +125°C. Packaged in a TSOT-23-8 surface-mount case, it includes shutdown capability and drives N-channel MOSFETs for high-voltage applications.

DC DC Switching Controllers Feature Summary

• Constant frequency current mode control architecture for stable operation
• Capable of driving N-channel MOSFETs in high input and output voltage converter applications
• Supports multiple converter topologies including boost, flyback, and SEPIC configurations

DC DC Switching Controllers Applications

• Boost converters requiring high input voltage ranges
• Flyback converters for isolated power supplies
• SEPIC converters for non-inverting or inverting step-up/down requirements
• Negative-to-negative buck converter designs using negative input rails

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm that the ITS8 package variant matches the required footprint for the design. Ensure the component meets RoHS compliance standards as specified by Analog Devices. Check availability status through authorized distributors as supply may be limited. Validate that the operating temperature range aligns with the intended environmental conditions.

DC DC Switching Controllers Selection Notes

Select this controller when designing converters that require handling input voltages up to 75 V. It is suitable for applications needing precise load regulation without external sense resistors. Consider the TSOT-23-8 package size for space-constrained PCB layouts. Ensure the external MOSFETs are rated for the maximum voltage and current stresses of the chosen topology. Verify that the 200 kHz switching frequency fits within the electromagnetic interference constraints of the system.

DC DC Switching Controllers Part Context

This component belongs to the LTC3873-5 series of power management ICs from Analog Devices. It is categorized under switching voltage regulators and DC/DC controllers. The part is designed to complement other PMIC solutions by providing flexible control for various power conversion needs. It shares architectural similarities with other members of the family but is optimized for specific voltage and package requirements.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other parts within the LTC3873 family such as the LTC3873ETS8-5#TRPBF or LTC3873IDDB-5#TRMPBF, depending on the required package type. Verify pin compatibility and electrical specifications before substitution. Alternative controllers from other manufacturers may require significant circuit redesign due to differences in control architecture and drive capabilities.