LTC3890EUH#PBF

DC DC Switching Controllers Overview

The LTC3890EUH#PBF is a high-performance dual step-down switching regulator DC/DC controller from Analog Devices, designed to drive all N-channel synchronous power MOSFET stages. It features a constant frequency current mode architecture with a phase-lockable switching frequency up to 850kHz. The device operates with an input voltage range of 4V to 60V and provides two independent output channels. Key electrical specifications include a typical no-load quiescent current of 50μA in sleep mode and a shutdown current of 14μA. It utilizes OPTI-LOOP® compensation for optimized transient response across various output capacitance and ESR values.

DC DC Switching Controllers Feature Summary

• Dual channel architecture minimizes input capacitor ESR power loss and noise by operating output stages out-of-phase
• OPTI-LOOP® compensation technology optimizes transient response over a wide range of output capacitance and ESR values
• Independent TRACK/SS pins allow each controller to ramp output voltages during start-up independently
• Current foldback functionality limits MOSFET heat dissipation during short-circuit conditions

DC DC Switching Controllers Applications

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

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the package type matches the design requirements as the component is available in QFN-EP-32 configurations. Check manufacturer documentation for any recent production changes or obsolescence notices before finalizing procurement plans.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring dual synchronous buck regulation with low quiescent current. Ensure the external MOSFETs can handle the required current levels and that the PCB layout supports the 32-pin QFN-EP package thermal requirements. Verify that the desired switching frequency falls within the lockable range for synchronization needs.

DC DC Switching Controllers Part Context

This component belongs to the LTC3890 series of PolyPhase controllers. It is part of Analog Devices' portfolio of high-efficiency power management solutions. The device is often evaluated using demonstration circuits such as the DC2236A-B, which highlights its capability in high-output voltage and current applications.

DC DC Switching Controllers Replacement Considerations

The LTC3890EUH-2#PBF is a related variant within the same family. Verify if the -2 suffix denotes specific performance differences or pin compatibility before substitution. Consult official datasheets to ensure functional equivalence for the specific application constraints.