LTC7801IFE#PBF

DC DC Switching Controllers Overview

The LTC7801IFE#PBF is a synchronous step-down DC/DC controller from Analog Devices, designed to drive a full N-channel synchronous power MOSFET stage. It operates with an input voltage range of 4V to 140V and supports absolute maximum voltages up to 150V. The device features a fixed frequency current-mode architecture with a switchable frequency range of 50 kHz to 900 kHz. It provides an adjustable output voltage from 800 mV to 60 V and can support output currents up to 10 A when paired with external components. The controller offers 100% duty cycle operation and includes integrated protection features such as input overvoltage lockout, cycle-by-cycle current limiting, and soft start. It is housed in a 24-lead TSSOP package with an exposed thermal pad.

DC DC Switching Controllers Feature Summary

• Supports high input voltages up to 140V for automotive and industrial applications
• Enables precise current sharing using optional DCR sense or external resistor sensing
• Features low quiescent current consumption for improved efficiency in battery-powered systems
• Offers flexible gate drive levels and burst mode operation for light load optimization

DC DC Switching Controllers Applications

• Automotive power systems including infotainment and body control modules
• Industrial point-of-load regulation for high-voltage buses
• Telecommunications infrastructure power distribution
• High-voltage battery-powered equipment and systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix PBF indicates lead-free compliance and tube packaging. Confirm the IFE variant corresponds to the industrial temperature grade (-40°C to +125°C). Check current availability status as supply may be limited or subject to factory orders. Ensure the ordering part number matches the exact package and temperature specification required for your design.

DC DC Switching Controllers Selection Notes

Select this controller when designing buck converters requiring wide input voltage ranges above standard 48V or 60V rails. Consider the TSSOP-24 package for thermal management needs and board space constraints. Evaluate the need for DCR sensing versus external resistors based on cost and accuracy requirements. Ensure the switching frequency selection aligns with inductor size and efficiency targets.

DC DC Switching Controllers Part Context

This component belongs to the LTC7801 series of high-voltage synchronous buck controllers. It shares architectural similarities with other members like the LTC7801EFE and LTC7801HFE, differing primarily in temperature rating and package type. The series is engineered for robust performance in demanding environments where high input voltages and low standby power are critical.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include LTC7801EFE#PBF and LTC7801HFE#PBF within the same family. Verify that any replacement matches the required operating temperature range and package dimensions. Cross-reference pinouts and electrical characteristics to ensure compatibility with existing PCB layouts and thermal designs.