LTC3789IUFD#PBF

DC DC Switching Controllers Overview

The LTC3789IUFD#PBF is a synchronous step-up/step-down DC/DC switching controller manufactured by Analog Devices Inc. It operates with an input voltage range of 2.7V to 60V and supports output voltages from 1.25V to 60V. The device features a fixed switching frequency of 400kHz, adjustable between 100kHz and 2MHz. It utilizes a 28-lead QFN (4x5mm) package with exposed pad for surface mount installation. The controller includes integrated bootstrap diodes and drivers for external N-channel MOSFETs.

DC DC Switching Controllers Feature Summary

• Supports buck, boost, and buck-boost topologies within a single controller architecture
• Integrated bootstrap diodes eliminate the need for external high-voltage diodes
• Provides cycle-by-cycle current limit protection for robust operation
• Features programmable soft-start to inrush current control

DC DC Switching Controllers Applications

• Industrial power systems requiring flexible voltage conversion
• Automotive electronics operating on varying bus voltages
• Battery-powered equipment needing bidirectional energy flow
• Telecommunications infrastructure power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free RoHS compliance before ordering. Confirm the IUFD designation matches the required industrial temperature grade and 28-QFN package dimensions. Ensure compatibility with external MOSFET gate drive requirements. Check for recent production change notices regarding pinout or electrical specifications.

DC DC Switching Controllers Selection Notes

Select this component when designing circuits that require both step-up and step-down capabilities from a single variable input source. It is suitable for applications where input voltage may exceed or fall below the desired output level. Consider the 400kHz default frequency against system EMI constraints and inductor size requirements.

DC DC Switching Controllers Part Context

This part belongs to the LTC3789 family of multiphase controllers designed for high-efficiency power conversion. It complements other Analog Devices PMIC solutions by offering versatile topology support. The device is part of the broader portfolio aimed at simplifying complex power management designs in compact form factors.

DC DC Switching Controllers Replacement Considerations

LTC3789EUFD#PBF: Same functional specifications but guaranteed for commercial temperature range instead of industrial.