LTC3873ETS8#TRPBF

DC DC Switching Controllers Overview

The LTC3873ETS8-5#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 4V to 75V and supports output voltages from 1.2V to 60V. The device features a fixed switching frequency of 200kHz and draws a typical quiescent current of 300µA. It provides load regulation of 0.05% and includes integrated soft-start and current limit functions. Packaged in an 8-pin TSOT-23, it is suitable for high input and output voltage applications.

DC DC Switching Controllers Feature Summary

• Supports boost, flyback, and SEPIC converter topologies without requiring sense resistors.
• Designed to drive N-channel MOSFETs for high input and output voltage applications.
• Integrates soft-start and current limit control characteristics.

DC DC Switching Controllers Applications

• High input voltage boost converters
• Flyback converters with isolated outputs
• SEPIC converters for varying input/output conditions

DC DC Switching Controllers Procurement Notes

Verify the specific suffix '-5' indicates the 200kHz switching frequency variant when ordering. Confirm that the TSOT-23-8 package matches the PCB footprint requirements. Ensure the application circuit supports the specified 4V to 75V input range. Check RoHS compliance status if required by project specifications. Validate thermal performance within the -40°C to +85°C operating temperature range.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring flexible topology support including boost, flyback, and SEPIC configurations. It is appropriate for applications needing high input voltage tolerance up to 75V. Consider the 200kHz fixed frequency for EMI management and component size optimization. Evaluate the 300µA quiescent current against standby power requirements. Ensure the external N-channel MOSFET selection aligns with the gate drive capabilities.

DC DC Switching Controllers Part Context

This part belongs to the LTC3873 family of DC/DC controllers from Analog Devices. The 'ETS8-5' designation specifies the TSOT-23-8 package and the 200kHz switching frequency variant. The '#TRPBF' suffix denotes tape and reel packaging with lead-free finish. It serves as a versatile controller for non-isolated and isolated power supply designs.

DC DC Switching Controllers Replacement Considerations

LTC3873IDDB-5#TRMPBF offers the same electrical specifications but utilizes an 8-DFN (3x2) package instead of TSOT-23-8. Verify pinout compatibility and thermal dissipation differences when substituting packages.