Analog Devices Inc. DC3248A

Overview

DC3248A from Analog Devices is an evaluation board designed to characterize the LTM4659, a 10A, low-voltage-input (2.25V–5.5V), high-efficiency step-down µModule regulator with programmable tracking, soft start, and die temperature monitoring via the SSTT pin. It supports 2MHz switching, delivers 1.0V ±1.5% output at 10A, and features Silent Switcher®2 architecture for ultralow EMI.

For engineers reviewing the DC3248A datasheet, DC3248A pinout, DC3248A application, or DC3248A equivalent, this board enables rapid validation of transient response (70mV load step), efficiency (82.16% at 3.3V_IN/1.0V_OUT/10A), thermal performance, and multi-phase paralleling capability under real-world thermal and load conditions.

Technical Context

The DC3248A implements the LTM4659 in a single-phase configuration with external compensation tuning, enabling stability optimization across input/output combinations. Its MODE/SYNC pin supports three modes: external clock synchronization (1–2.6MHz), clock output, or PWM mode selection (FCM or PSM).

It provides direct access to key control signals - SSTT for tracking/soft-start/temperature monitoring, FREQ for frequency setting, and MODE/SYNC for operational mode - allowing full functional verification of the LTM4659's adaptive behavior under varying VIN, VOUT, and load profiles.

Key Specifications

Availability

DC3248A is available at Aetrix Electronics and suitable for power integrity validation, µModule regulator qualification, and high-efficiency DC-DC design verification requiring stable component supply and documented reference performance.

Supply support for DC3248A 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and power management markets.

The DC3248A belongs to Analog Devices' µModule evaluation board product line, engineered to accelerate adoption of integrated power solutions by providing fully tested, layout-optimized platforms for LTM-series regulators.

FAQ

What is the primary function of the DC3248A evaluation board?

The DC3248A evaluation board is a ready-to-use platform for evaluating the LTM4659 µModule regulator. It enables engineers to measure efficiency, transient response, thermal behavior, and programmability features-including SSTT-based tracking and soft start-without designing custom PCBs. The DC3248A includes all necessary passive components, test points, and jumpers for immediate bench testing.

Does the DC3248A support external clock synchronization for the LTM4659?

Yes, the DC3248A supports external clock synchronization via the MODE/SYNC pin. When JP8 is set to CLK, the board accepts an external clock signal (1MHz–2.6MHz) at the CLK test point, allowing precise timing alignment with system clocks. This capability is verified in Table 2 and Section 7 of the User Guide, and applies directly to the DC3248A's implementation of the LTM4659.

Can the DC3248A be used to evaluate multiple LTM4659s in parallel?

While the DC3248A itself is a single-phase board, its design documentation explicitly states that "multiple LTM4659s can be paralleled to run out-of-phase" for >10A applications. The DC3248A provides the reference layout, compensation guidance, and signal access (e.g., MODE/SYNC, FREQ) needed to replicate and validate such configurations - making it essential for scalable power system development.

What output voltage is pre-configured on the DC3248A, and how is it set?

The DC3248A is factory-configured for 1.0V output, achieved using R4 and R6 (60.4kΩ each) in the feedback divider network per Table 1 and schematic. This matches the typical operating point specified in the LTM4659 datasheet and enables immediate validation of core voltage regulation accuracy (±1.5%) without resistor changes. The DC3248A User Guide confirms this value in both the Performance Summary and Quick Start sections.

Is external compensation required when using the DC3248A with the LTM4659?

Yes, the LTM4659 used on the DC3248A requires external compensation, and the board includes provisioned locations (C13, R3, C4) for tuning the control loop. The User Guide states users "can tune the compensation circuit to ensure the loop is stable and that the desired transient performance can be achieved," confirming that the DC3248A delivers full design flexibility-not just fixed operation.