LTC3872EDDB#TRMPBF

DC DC Switching Controllers Overview

The LTC3872EDDB#TRMPBF is a constant frequency current mode boost DC/DC controller manufactured by Analog Devices Inc. It operates within an input voltage range of 2.75V to 9.8V and features a fixed switching frequency of 550kHz. The device utilizes a DFN-8 package (2x3mm) with an exposed pad for thermal management. It supports positive output configurations and includes integrated soft-start functionality. The controller draws a typical operating supply current of 0.25mA, ensuring efficient power management in space-constrained applications.

DC DC Switching Controllers Feature Summary

• Eliminates the need for external current sense resistors through proprietary no-RSENSE current mode control architecture
• Integrates soft-start capability to limit inrush current during startup sequences
• Supports high efficiency operation via fixed 550kHz constant frequency current mode control
• Features low quiescent current consumption for improved system power efficiency

DC DC Switching Controllers Applications

• Battery-powered portable equipment requiring step-up voltage conversion
• Industrial systems utilizing single-cell lithium-ion or lithium-polymer batteries
• Automotive electronics operating from 12V or 24V battery architectures
• Communication infrastructure powering components from lower voltage rails

DC DC Switching Controllers Procurement Notes

Verify the specific suffix EDDB corresponds to the required temperature grade and packaging configuration. Confirm that the TRMPBF designation indicates tape and reel packaging with lead-free composition. Ensure compatibility with the target PCB footprint for the 8-DFN package. Validate RoHS compliance status against current regulatory requirements before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this component when resistor-less current sensing is required to reduce bill of materials cost and board space. Consider the 550kHz frequency for balancing component size against transient response requirements. Evaluate the 2.75V minimum input voltage against the lowest expected source voltage. Compare the DFN-8 thermal performance against alternative packages if high power dissipation is anticipated.

DC DC Switching Controllers Part Context

This part belongs to the LTC3872 family of boost controllers designed for high-efficiency power conversion. The family shares core control logic but varies in package options and temperature ranges. Related variants include the LTC3872ETS8 for TSOT-23 packaging and the LTC3872-1 for specific pinout configurations. The series targets applications demanding compact solutions without sacrificing control precision.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other Analog Devices boost controllers such as the LTC3873 if topology flexibility is required. Cross-reference pinouts and control characteristics carefully when considering non-family alternatives.