LTC3890IUH#PBF

DC DC Switching Controllers Overview

The LTC3890IUH#PBF is a high-performance dual step-down switching regulator DC/DC controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4V to 60V and supports output voltages from 800mV to 24V. The device delivers up to 15A of output current across two channels, utilizing a constant frequency current mode architecture with a switchable frequency up to 900kHz. Key electrical parameters include a typical quiescent current of 60µA in sleep mode and a load regulation of 0.01%. It features independent TRACK/SS pins for each controller and operates within a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Drives all N-channel synchronous power MOSFET stages using a constant frequency current mode architecture.
• Minimizes input capacitor ESR power loss and noise by operating the two controller output stages out-of-phase.
• Features OPTI-LOOP compensation to optimize transient response over a wide range of output capacitance and ESR values.
• Includes independent TRACK/SS pins for each controller to ramp output voltages during start-up.

DC DC Switching Controllers Applications

• Automotive always-on systems
• Battery operated digital devices
• Distributed DC power systems

DC DC Switching Controllers Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any updates regarding electrical characteristics or mechanical dimensions. Ensure storage conditions comply with moisture sensitivity level requirements before reflow soldering. Validate supplier documentation against official manufacturer specifications.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring dual independent outputs with low quiescent current consumption. Consider the 60V input tolerance for automotive or industrial bus architectures. Evaluate thermal management requirements based on the 15A total current capability and QFN-32 package. Verify that external MOSFET selection aligns with the gate drive capabilities and switching frequency options.

DC DC Switching Controllers Part Context

This component belongs to the LTC3890 series of PolyPhase controllers designed for high-efficiency power conversion. It is part of Analog Devices' portfolio of synchronous buck controllers targeting dense power delivery solutions. The device complements other members like the LTC3890EUH and LTC3890MPUH, differing primarily in temperature grades and packaging variants while maintaining core functional similarities.

DC DC Switching Controllers Replacement Considerations

LTC3890EUH#PBF

DC DC Switching Controllers FAQ

How does the LTC3890 reduce input capacitor stress?

It operates the two controller output stages out-of-phase, which minimizes power loss and noise caused by the equivalent series resistance (ESR) of the input capacitor.

What is the maximum phase-lockable frequency?

The constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz.