Analog Devices Inc. DC1021A

Overview

DC1021A from Analog Devices (formerly Linear Technology) is a demonstration circuit board centered on the LTC3823EUH synchronous buck controller, configured as a high-efficiency 2.5V/10A step-down converter with differential remote sensing and output voltage tracking capability. It operates from 4.5V to 16V input, delivers ±2% output regulation, supports 500kHz switching, and enables phase-locked synchronization for multi-rail power systems in telecom and industrial computing.

For engineers reviewing the DC1021A datasheet, DC1021A pinout, DC1021A application, or DC1021A equivalent, this page details its validated performance envelope, tracking configuration options, differential sensing implementation, efficiency curves at full load, and design files availability for system integration and layout validation.

Technical Context

The DC1021A implements constant-on-time, valley-current-mode control using the LTC3823EUH - eliminating the need for a current-sense resistor while enabling fast transient response and stable low-duty-cycle operation. Its architecture supports both discontinuous conduction mode (DCM) and forced continuous conduction mode (FCCM), selectable via JP1 jumper.

Differential remote sensing is implemented via dedicated VOUTSENSE+ and VOUTSENSE− terminals, directly connecting to load terminals to reject PCB trace IR drop. Output tracking is enabled through the TRACK/SS pin with configurable ratiometric or coincident behavior, verified per Figure 4 of the Quick Start Guide.

Key Specifications

Availability

DC1021A is available at Aetrix Electronics and suitable for telecom power subsystem validation, industrial FPGA power sequencing, and high-density server VRM prototyping requiring stable component supply and documented reference design fidelity.

Supply support for DC1021A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices acquired Linear Technology in 2017 and maintains full technical and supply chain support for all Linear demo circuits and controllers.

The DC1021A belongs to Linear's demonstration circuit portfolio, designed specifically to validate high-current, high-accuracy synchronous buck controllers like the LTC3823EUH in real-world thermal and dynamic load conditions.

FAQ

What is the primary function of DC1021A?

DC1021A is a fully assembled and tested demonstration circuit that implements the LTC3823EUH synchronous buck controller to deliver 2.5V at up to 10A from a 4.5V–16V input. Its purpose is to validate performance metrics-including efficiency, ripple, tracking, and differential sensing-in a production-representative layout. DC1021A is not a standalone IC but a functional reference design board for power system evaluation.

Does DC1021A support output voltage tracking, and how is it configured?

Yes, DC1021A supports both coincident and ratiometric output voltage tracking via the LTC3823EUH's TRACK/SS pin. Configuration requires moving JP2 to TRACK position, removing the soft-start capacitor, and connecting an external voltage source through a resistor divider to the TRACK pin. This functionality is verified in Figure 4 of the Quick Start Guide and enables precise sequencing with other rails.

How is differential remote sensing implemented on DC1021A?

DC1021A implements true differential remote sensing using dedicated VOUTSENSE+ and VOUTSENSE− terminals routed to the load's positive and negative terminals. This compensates for voltage drop across PCB traces and connectors, ensuring accurate regulation at the point-of-load. The Quick Start Guide explicitly states this connection method and confirms its use on the DC1021A board.

What are the supported operating modes on DC1021A?

DC1021A supports two light-load operating modes: Discontinuous Conduction Mode (DCM), selected by default via JP1 in DCM position, and Forced Continuous Conduction Mode (FCCM), enabled by moving JP1 to FCCM. Mode selection affects light-load efficiency and output ripple characteristics, as reflected in the dual-curve efficiency plot (Figure 3).

Are design files available for DC1021A?

Yes, complete design files-including schematic, layout Gerbers, and bill of materials-for DC1021A are available directly from Analog Devices. The Quick Start Guide states "Design files for this circuit board are available. Call the LTC factory," confirming official support and access for licensed engineering reuse and derivative design.