LTC3779IFE#PBF

DC DC Switching Controllers Overview

The LTC3779IFE#PBF is a synchronous buck-boost DC/DC controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4.5V to 150V and supports output voltages from 1.2V to 150V. The device features a fixed-frequency current mode architecture with a programmable switching frequency between 50kHz and 600kHz. It utilizes a four-switch, single-inductor topology for efficient power conversion. The component is housed in a 38-lead TSSOP package with an exposed pad and is rated for operation across temperature ranges up to +125°C or +150°C depending on the specific suffix.

DC DC Switching Controllers Feature Summary

• Synchronous buck-boost topology with four switches and a single inductor
• Wide input voltage range supporting 4.5V to 150V
• Programmable constant frequency operation up to 600kHz
• Integrated 36V external LDO for driver supply

DC DC Switching Controllers Applications

• Telecommunications systems
• Avionics power supplies
• Automotive electronics
• Battery charging applications

DC DC Switching Controllers Procurement Notes

Verify the exact suffix against official Analog Devices documentation to confirm temperature grade and packaging type. Ensure the procurement channel provides valid traceability for the #PBF lead-free designation. Cross-reference the datasheet revision history for any recent manufacturing changes that may affect pinout or electrical characteristics prior to final design integration.

DC DC Switching Controllers Selection Notes

Select this controller when designing systems requiring wide input voltage flexibility and high efficiency across buck and boost modes. Consider the 38-TSSOP package constraints for thermal management. Evaluate the need for PLL synchronization if noise immunity is critical. Confirm that the external MOSFETs and inductor selected can handle the peak currents associated with the 150V input range and specified load conditions.

DC DC Switching Controllers Part Context

This part belongs to the LTC3779 family of buck-boost controllers designed for high-voltage applications. It shares architectural similarities with other Analog Devices power management ICs but is distinct in its ability to handle extreme input voltage variations. The IFE variant specifically denotes the industrial temperature range and tube packaging option within the broader product line.

DC DC Switching Controllers Replacement Considerations

LTC3779HFE#PBF offers an extended maximum junction temperature rating compared to the standard IFE variant.