LTC3890HGN-1#PBF

DC DC Switching Controllers Overview

The LTC3890HGN-1#PBF is a low quiescent current, dual synchronous step-down DC/DC controller manufactured by Analog Devices. It operates with an input voltage range of 4V to 60V and supports output voltages from 0.8V to 24V. The device features a constant frequency current mode architecture with a switchable frequency range of 350kHz to 535kHz. It utilizes SSOP-28 packaging and includes independent TRACK/SS pins for synchronized startup sequencing. The controller drives N-channel MOSFETs and incorporates OPTI-LOOP compensation for optimized transient response across varying output capacitance.

DC DC Switching Controllers Feature Summary

• Dual channel architecture driving synchronous N-channel power MOSFET stages
• OPTI-LOOP compensation technology for wide-range output capacitance optimization
• Independent ramp control via dedicated TRACK/SS pins for each controller
• Current foldback protection mechanism to limit heat dissipation during short circuits

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 Analog Devices documentation to confirm package type and temperature rating. Ensure compatibility with external gate drive requirements and input voltage levels. Confirm availability status through authorized distributors as supply constraints may apply. Cross-reference pinout configurations with the official datasheet to prevent integration errors during PCB layout.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring dual isolated outputs from a single high-voltage rail. The low no-load quiescent current extends battery life in portable systems. Verify that the required switching frequency falls within the 350kHz to 535kHz operational window. Ensure the load current demands are supported by the external MOSFET selection rather than the controller itself.

DC DC Switching Controllers Part Context

This part belongs to the LTC3890 family of high-performance dual step-down switching regulators. It is designed to minimize power loss and noise by operating output stages out-of-phase. The series integrates precision references and power good indicators for robust system monitoring and management in complex power distribution networks.

DC DC Switching Controllers Replacement Considerations

LTC3890EGN-1#PBF: Similar dual buck controller but with different thermal and electrical specifications.

DC DC Switching Controllers FAQ

How does the device manage transient response?

It uses OPTI-LOOP compensation to optimize transient response over a wide range of output capacitance and ESR values.

What is the function of the TRACK/SS pins?

These pins allow independent control of the output voltage ramp during startup for each of the two controllers.