Analog Devices Inc. DC1084A-B

Overview

DC1084A-B from Analog Devices is a 15mm × 15mm × 2.8mm evaluation board for the LTM4602HV 6A, 4.5V–28V input µModule DC/DC step-down regulator. It implements full power delivery with integrated controller, FETs, inductor, and support components, delivering 6A continuous (8A peak) at 0.6V–5V output with ≤1.5% regulation accuracy and up to 92% efficiency. It enables rapid validation of point-of-load power in telecom, server, and industrial systems.

For engineers reviewing the DC1084A-B datasheet, DC1084A-B pinout, DC1084A-B application, or DC1084A-B equivalent, this page provides verified layout guidance, thermal performance data, transient response waveforms, soft-start configuration options, and compatibility notes with LTM4602HV variants including LTM4602HVEV#PBF and LTM4602HVIV#PBF.

Technical Context

The DC1084A-B implements the LTM4602HV's adaptive on-time current-mode control architecture, enabling ultrafast transient response (<25µs settling time for 10%–90% load steps) without external compensation. It supports forced continuous conduction mode (FCM) via FCB pin grounding or discontinuous mode (DCM) for light-load efficiency via FCB > 0.63V.

It integrates all critical decoupling: dual 10µF X5R ceramic input capacitors adjacent to VIN/PGND, 22µF + 330µF output capacitance (ceramic + polymer), and internal 1000pF soft-start timing capacitor. The board routes RUN/SS, PGOOD, VOSET, and EXTVCC for direct system-level integration and margining.

Key Specifications

Availability

DC1084A-B is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and industrial embedded power design requiring stable component supply, fast evaluation turnaround, and production-ready reference layout fidelity.

Supply support for DC1084A-B 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) designs high-performance analog, mixed-signal, and power management ICs for precision, reliability, and integration.

The DC1084A-B belongs to Analog Devices' µModule Evaluation Board product line, engineered to accelerate prototyping and validation of complete, thermally optimized DC/DC power subsystems in space-constrained applications.

FAQ

What is the primary function of the DC1084A-B evaluation board?

The DC1084A-B evaluation board is a fully assembled, tested platform for evaluating the LTM4602HV 6A µModule DC/DC regulator. It provides immediate access to all control pins (RUN/SS, FCB, PGOOD, VOSET), pre-routed thermal vias, and validated input/output capacitor networks. Engineers use DC1084A-B to verify voltage regulation accuracy, transient behavior, thermal performance, and system-level integration before committing to custom PCB design.

Does DC1084A-B support both forced continuous and discontinuous conduction modes?

Yes, DC1084A-B supports both modes via the FCB pin. Grounding FCB (Jumper JP1 closed) enables forced continuous conduction mode (FCM) for minimal output ripple. Leaving FCB open or pulling it above 0.63V (e.g., via resistor to VIN) enables discontinuous conduction mode (DCM) to improve light-load efficiency. This functionality is implemented per LTM4602HV datasheet Section "FCB (Pin G23)" and verified on DC1084A-B schematic Rev. C.

Can DC1084A-B be used to evaluate output voltage margining?

Yes, DC1084A-B supports voltage margining through its VOSET node and dedicated test points (TP1, TP2). By adding external transistors (QUP/QDOWN) and resistors (RUP/RDOWN) as shown in Figure 2 of the LTM4602HV datasheet, users can dynamically adjust the output voltage ±M% during production testing. The board's accessible VOSET net and SGND reference enable straightforward implementation without soldering to the µModule itself.

What thermal performance can be expected from DC1084A-B under full 6A load?

At 12VIN → 1.5V/6A, DC1084A-B achieves junction temperatures ≤95°C with 200LFM airflow and ≤105°C in still air, per Analog Devices' thermal characterization (θJA = 15°C/W, θJC = 6°C/W). The board uses 10 thermal vias under the LGA package and 2oz copper on inner layers to replicate production-grade heat dissipation - critical for validating thermal margins in dense server or networking PCBs.

Is DC1084A-B compatible with other LTM4602 family members?

DC1084A-B is specifically designed for the LTM4602HV but is mechanically and electrically compatible with LTM4602HVEV#PBF and LTM4602HVIV#PBF due to identical 104-lead LGA footprint, pinout, and thermal pad layout. It is not compatible with the standard LTM4602 (4.5V–20V input) because the HV variant's absolute maximum VIN rating (28V) requires reinforced isolation and layout clearance - differences reflected in DC1084A-B's creepage/clearance design.