Analog Devices Inc. DC2312A-A

Overview

DC2312A-A from Analog Devices (formerly Linear Technology) is a dual-phase, dual-output synchronous buck converter demonstration board built around the LTC3882EUJ-1 dual-channel voltage-mode controller with PMBus interface and power system management. It delivers 1.5V/35A and 1.0V/35A simultaneously from a 7–14V input at 500kHz switching frequency, enabling high-efficiency evaluation of digital power delivery for FPGA, ASIC, and multi-rail server applications.

For engineers reviewing the DC2312A-A datasheet, DC2312A-A pinout, DC2312A-A application, or DC2312A-A equivalent, this board supports real-time configuration via LTpowerPlay GUI, telemetry monitoring (voltage, current, temperature), fault logging, and nonvolatile EEPROM storage - critical for validating power sequencing, margining, and thermal performance in high-density digital systems.

Technical Context

The DC2312A-A implements two independent 35A output channels using Fairchild FDMF5820DC DrMOS modules and 0.17µH inductors, with differential remote sensing on both VOUT0 and VOUT1. The LTC3882EUJ-1 provides dedicated PGOOD outputs, IAVG current monitoring, and phase interleaving to reduce input/output ripple.

It operates in continuous conduction mode (CCM) with factory-default 500kHz switching, supports external 5V bias for VDR and VCC, and uses 2.5V-rated POSCAPs (EEFGX0E471R) optimized for load transient response. Forced airflow is required for continuous full-load operation.

Key Specifications

Availability

DC2312A-A is available at Aetrix Electronics and suitable for FPGA power delivery, ASIC core rail validation, and multi-output server PSU prototyping requiring stable component supply and full digital power management capability.

Supply support for DC2312A-A 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 its portfolio of high-performance power management ICs and reference designs.

The DC2312A-A belongs to Linear's Digital Power Demonstration platform, designed specifically to accelerate adoption of PMBus-enabled power systems in datacenter, telecom, and high-end computing applications.

FAQ

What is the primary function of the DC2312A-A demonstration board?

The DC2312A-A is a fully assembled, tested evaluation platform for the LTC3882EUJ-1 dual-output digital power controller. It enables engineers to validate dual-rail power delivery (1.5V/35A and 1.0V/35A), configure PMBus parameters via LTpowerPlay, monitor real-time telemetry, and assess thermal and transient performance without designing a custom PCB. The DC2312A-A simplifies bring-up and characterization of complex digital power systems.

Can the DC2312A-A be used to evaluate single-output configurations?

No - the DC2312A-A is strictly a dual-phase, dual-output configuration. Its hardware layout, jumper settings (JP1=NC, JP2=NC), and default resistor network are fixed for independent VOUT0 and VOUT1 operation. For single-output, 70A evaluation, the DC2312A-B variant must be used, which ties GPIO0B/GPIO1B and RUN0/RUN1 and configures both phases into one rail.

Does the DC2312A-A require external software to access its power management features?

Yes - full utilization of the DC2312A-A's PMBus capabilities requires the LTpowerPlay GUI software and the DC1613A USB-to-PMBus dongle. While the board powers up to default settings autonomously (no bus communication needed), dynamic reconfiguration, telemetry logging, fault analysis, and EEPROM programming all depend on LTpowerPlay. The software is freely downloadable from analog.com/LTpowerPlay.

What are the mandatory cooling requirements for continuous operation of the DC2312A-A?

For continuous operation at full rated load (35A per channel), forced airflow of at least 400LFM is mandatory, as confirmed by thermal imaging (Figure 10). Without active cooling, thermal throttling or shutdown may occur due to junction temperature limits of the FDMF5820DC DrMOS modules and LTC3882EUJ-1 controller. Passive cooling is insufficient for sustained 70A total output.

How does the DC2312A-A handle load transients, and what components optimize this behavior?

The DC2312A-A achieves fast load transient response (<50µs settling time, Figure 8) through differential remote sensing, 0.17µH low-DCR inductors, and a tailored output capacitor bank: eight 100µF/6.3V X5R ceramics (GRM31CR60J107ME39L) plus eight 470µF/2.5V POSCAPs (EEFGX0E471R). This combination minimizes impedance across 10kHz–1MHz, reducing output voltage deviation during 0%→25% (8.75A) steps at 1.0V.