LTC3803IS6-3#TRMPBF

DC DC Switching Controllers Overview

The LTC3803IS6-3#TRMPBF is a flyback DC/DC switching controller from Analog Devices Inc., designed for isolated power supply applications. It operates with a fixed switching frequency of 200 kHz and supports an input voltage range from 9.2 V to 75 V. The device provides a single positive output capable of up to 1 A current, regulated via constant frequency current mode control. Key electrical parameters include a maximum duty cycle of 80%, a typical quiescent current of 240 uA, and a supply voltage range of 5.7 V to 8 V. It functions within a junction temperature range of -40°C to 125°C.

DC DC Switching Controllers Feature Summary

• Implements constant frequency current mode control for stable regulation in flyback topologies.
• Provides integrated current limit and enable functionality for system protection.
• Supports isolated output configurations with positive polarity.
• Operates efficiently with low quiescent current consumption.

DC DC Switching Controllers Applications

• Isolated telecom DC/DC converters
• Industrial power supplies requiring galvanic isolation
• Point-of-load conversion with isolation requirements

DC DC Switching Controllers Procurement Notes

Verify the specific suffix '-3' corresponds to the required output voltage configuration or internal reference setting as defined in the official datasheet. Confirm that the TSOT-23-6 package dimensions align with the PCB footprint design. Ensure the operating temperature grade meets the environmental requirements of the target application, noting the specified junction temperature limits.

DC DC Switching Controllers Selection Notes

Select this component when a compact, isolated flyback solution is needed with a wide input voltage range up to 75 V. The fixed 200 kHz frequency allows for smaller passive components compared to lower frequency alternatives. Consider the 1 A output capability and the need for current mode control stability. Evaluate the thermal performance within the TSOT-23-6 package for the expected power dissipation levels.

DC DC Switching Controllers Part Context

This part belongs to the LTC3803 series of flyback controllers from Analog Devices. It is specifically the industrial temperature grade variant housed in a TSOT-23-6 package. The series is designed for cost-effective, high-performance isolated power conversion. Other variants in the family may differ in temperature range, package type, or specific internal settings.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other parts within the LTC3803 family such as LTC3803ES6-3#TRMPBF or LTC3803IS6#TRMPBF, provided they match the required temperature grade and pinout compatibility. Verify functional equivalence regarding switching frequency and control topology before substitution.