LTC3890IGN-1#PBF

DC DC Switching Controllers Overview

The LTC3890IGN-1#PBF is a dual synchronous step-down DC/DC controller from Analog Devices, designed for high-performance power management. It operates within an input voltage range of 4V to 60V and supports two independent outputs with voltages adjustable from 0.8V to 24V. The device utilizes a constant-frequency current mode architecture with a programmable switching frequency between 105kHz and 835kHz. Key electrical specifications include a typical no-load quiescent current of 60µA and a shutdown current of 14µA. It features a precision 0.8V reference and drives all N-channel synchronous power MOSFET stages.

DC DC Switching Controllers Feature Summary

• Dual output capability with independent TRACK/SS pins for synchronized start-up sequencing
• OPTI-LOOP compensation technology for optimized transient response across varying output capacitance and ESR values
• Current foldback protection mechanism to limit MOSFET heat dissipation during short-circuit conditions
• Phase-lockable switching frequency architecture allowing operation out-of-phase to minimize input capacitor ESR losses

DC DC Switching Controllers Applications

• Automotive always-on systems requiring wide input voltage tolerance
• Battery-operated digital devices benefiting from low quiescent current operation
• Distributed DC power systems utilizing multi-phase configurations
• Industrial equipment power supplies demanding high efficiency and reliability

DC DC Switching Controllers Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm package type and temperature grade. Ensure compatibility with required thermal management solutions given the SSOP-28 footprint. Confirm availability status as supply constraints may affect lead times. Validate that the selected variant meets the specific input voltage and output current requirements of the target application design.

DC DC Switching Controllers Selection Notes

Select this component when a dual-output synchronous buck solution is required with inputs up to 60V. Consider the SSOP-28 package for applications prioritizing board space over maximum thermal dissipation compared to QFN options. Evaluate the need for phase-lockable frequencies if multiple units are deployed in parallel to reduce input ripple. Assess whether the 60µA quiescent current meets the standby power requirements of the system.

DC DC Switching Controllers Part Context

This part belongs to the PolyPhase family of controllers, which are engineered for high-efficiency multiphase applications. The LTC3890 series provides a scalable platform for designing compact power stages. The IGN-1 variant specifically denotes the SSOP-28 package configuration, distinguishing it from other pinout or thermal performance variants like the EUH or MPUH series.

DC DC Switching Controllers Replacement Considerations

LTC3890EUH#PBF: Offers identical functionality in a 32-QFN package for improved thermal performance. LTC3890MPUH#TRPBF: Provides the same core features in a tape-and-reel QFN format for automated assembly.