LTC3890IUH#TRPBF

DC DC Switching Controllers Overview

The LTC3890IUH#TRPBF 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 105 kHz to 835 kHz. The device supports an input voltage range of 4 V to 60 V and provides two independent outputs capable of delivering up to 15 A each. Output voltages are adjustable from 800 mV to 24 V. Key electrical specifications include a typical no-load quiescent current of 60 µA in sleep mode and a shutdown current of 14 µA. The controller operates within a junction temperature range of -40°C to +125°C and is housed in a 32-lead QFN package.

DC DC Switching Controllers Feature Summary

• Dual output stage operation allows for out-of-phase control to minimize input capacitor ESR losses and noise.
• OPTI-LOOP compensation enables optimized transient response across a wide range of output capacitance and ESR values.
• Independent TRACK/SS pins allow for precise sequencing and soft-start ramping of output voltages during startup.
• 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 #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer part number matches exactly, as Analog Devices uses distinct suffixes for different packages and temperatures. Check official distributor availability status, as supply may be limited or subject to factory special orders. Ensure RoHS compliance documentation is obtained directly from the manufacturer datasheet.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring dual isolated rails from a single high-voltage bus. The 60 V input rating suits automotive and industrial environments. Consider the 32-QFN package for thermal management requirements. Verify that the required switching frequency falls within the 105 kHz to 835 kHz range. Ensure the design utilizes N-channel synchronous MOSFETs compatible with the controller's gate drive capabilities.

DC DC Switching Controllers Part Context

This part belongs to the LTC3890 family of PolyPhase controllers. Variants such as the LTC3890EUH differ primarily in operating temperature ranges and package types. The IUH suffix specifically denotes the industrial temperature grade (-40°C to +125°C) and the QFN-32 package configuration. Other family members may support SEPIC topologies or offer different pinouts.

DC DC Switching Controllers Replacement Considerations

Direct substitutes within the same family include the LTC3890EUH#PBF for leaded QFN packaging or the LTC3890MPUH#TRPBF for military-grade temperature ratings. Verify pin compatibility and thermal performance before substitution. Cross-reference with the manufacturer's latest selection guide for updated availability and parameter changes.