LTC3890EUH-2#PBF

DC DC Switching Controllers Overview

The LTC3890EUH-2#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 range of 105kHz to 835kHz. The device supports an input voltage range of 4V to 60V and provides two independent output channels. It operates within a junction temperature range of -40°C to 125°C and is housed in a 32-WFQFN package with an exposed thermal pad.

DC DC Switching Controllers Feature Summary

• Dual channel architecture enables out-of-phase operation to minimize input capacitor ESR losses and noise.
• OPTI-LOOP compensation optimizes transient response across a wide range of output capacitance and ESR values.
• Independent TRACK/SS pins allow synchronized ramping of output voltages during start-up sequences.
• 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 against official documentation to confirm the operating temperature grade and package variant. Ensure the procurement source provides valid traceability for the PBF designation. Confirm that the supplier offers genuine components with appropriate quality certifications. Cross-reference the manufacturer part number with the latest datasheet revision to ensure compatibility with design requirements.

DC DC Switching Controllers Selection Notes

Select this component when a dual-output synchronous buck solution is required with a wide input voltage range up to 60V. The device is suitable for applications demanding low quiescent current and optimized transient response. Consider the thermal performance of the QFN package and the need for external N-channel MOSFETs. Verify that the required switching frequency falls within the programmable range of the controller.

DC DC Switching Controllers Part Context

This controller belongs to the PolyPhase family of power management ICs from Analog Devices. It is part of the broader LTC3890 series, which includes variants such as the LTC3890MPUH and LTC3890IUH. These devices share similar architectural features but differ in temperature ratings and packaging options. The series is designed for high-efficiency power conversion in demanding industrial and automotive environments.

DC DC Switching Controllers Replacement Considerations

The LTC3890EUH is a direct functional equivalent within the same product line. Check the LTC3890MPUH for extended temperature range requirements. Verify pinout compatibility before substituting with other dual-channel controllers from different manufacturers.

DC DC Switching Controllers FAQ

What is the maximum duty cycle supported by the LTC3890EUH-2#PBF?

The device supports a maximum duty cycle of 99%.

Does the LTC3890EUH-2#PBF support clock synchronization?

No, the datasheet indicates that clock synchronization is not available for this specific model.

How does the device handle short-circuit conditions?

It utilizes current foldback to limit MOSFET heat dissipation during short-circuit events.