LT3790HFE

Overview

The LT3790HFE is a synchronous four-switch buck-boost DC-DC controller designed for wide input voltage ranges from 1.8V to 36V. It integrates high-side and low-side MOSFET drivers capable of delivering up to 4A continuous switch current. The device supports various topologies including buck, boost, and SEPIC configurations. Key electrical parameters include a minimum supply voltage of 3V and a maximum operating temperature of 125°C. It is housed in a 38-TSSOP package with an exposed pad.

Feature Summary

• Integrates dedicated drivers for both high-side and low-side power MOSFETs
• Supports synchronous rectification for improved efficiency
• Capable of handling wide input voltage variations without discontinuity

Applications

• Industrial battery-powered equipment
• Automotive electronics requiring wide voltage tolerance
• Portable devices with single-cell lithium-ion batteries

Procurement Notes

Verify the specific suffix (PBF) indicates lead-free packaging compliance when sourcing. Confirm the package type matches the required PCB footprint. Ensure the supplier provides official datasheets to validate the operational temperature range and current capabilities against system requirements.

Selection Notes

Select this component for applications demanding seamless transitions between buck and boost modes. It is suitable where input voltages fluctuate significantly around the output voltage level. Consider the thermal performance of the TSSOP-EP package for heat dissipation needs in enclosed environments.

Part Context

This part belongs to Analog Devices' family of switching regulators. It serves as a core control element for power management systems. The device replaces discrete driver solutions by integrating control logic and gate drive circuits into a single IC.

Replacement Considerations

The LT3790HFE#TRPBF is a tape-and-reel version of the same functional device. Verify pin compatibility and thermal characteristics when substituting between tray and reel packaging formats.