Analog Devices Inc. DC2634A

Overview

DC2634A from Analog Devices is a demonstration circuit board featuring the LTM4656 µModule synchronous boost regulator, designed to evaluate 6V–36V input-to-24V/4A output conversion in industrial and embedded power systems. It delivers >95% efficiency at 4A load with 12V input, includes integrated short-circuit protection limiting input current to ~5A, and supports output voltage adjustment via FB pin resistors.

For engineers reviewing the DC2634A datasheet, DC2634A pinout, DC2634A application, or DC2634A equivalent, this page provides verified performance data, thermal behavior under 4A load, soft-start timing, load-step response with dual 100µF + quad 6.8µF output capacitance, and BURST mode operation for light-load efficiency optimization.

Technical Context

The DC2634A implements a fixed-frequency (400kHz) synchronous boost architecture using the LTM4656EY#PBF µModule, which integrates power MOSFETs, inductor, and control circuitry in a BGA-144 package. Its VIN-to-VOUT relationship follows a regulated 24V output when input is 6–23V, and transitions to VIN-follow mode above 24V input.

It features precision internal voltage reference (±2% VOUT tolerance), programmable soft-start via external capacitor on TIMER pin, and autonomous short-circuit protection with 78μs foldback timeout and 33ms cooldown period. Output voltage regulation is maintained across 0–4A load range with <300mV_P-P ripple at 1A load.

Key Specifications

Availability

DC2634A is available at Aetrix Electronics and suitable for industrial power conversion, test equipment power supplies, and embedded system auxiliary rail generation requiring stable component supply, rapid evaluation capability, and documented thermal performance up to 4A continuous load.

Supply support for DC2634A 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 industrial, automotive, communications, and healthcare markets since 1965.

The DC2634A belongs to Analog Devices' µModule regulator demonstration platform family, engineered to accelerate validation of high-density, fully integrated power solutions for space-constrained and thermally demanding applications.

FAQ

What is the primary function of the DC2634A?

The DC2634A is a demonstration circuit board built around the LTM4656EY#PBF µModule regulator, intended for evaluating synchronous boost conversion from 6V–36V input to a regulated 24V/4A output. It is not a standalone IC but a ready-to-test hardware platform with validated layout, thermal design, and protection features - all centered on the DC2634A's role as an evaluation vehicle for the LTM4656.

Can the DC2634A generate output voltages other than 24V?

Yes - the DC2634A's output voltage is adjustable by modifying the feedback resistor network connected to the LTM4656's FB pin (R2, R3, R4 per schematic). The default 24V setting uses specific values; changing those resistors recalculates VOUT = 0.8V × (1 + R_top/R_bottom). The DC2634A supports outputs up to 36V depending on input and stability margins.

How does the DC2634A handle short-circuit conditions?

The DC2634A leverages the LTM4656's internal short-circuit protection: during output short, input current is actively limited to ~5A, and a 78μs timer initiates foldback. After timeout, a 33ms cooldown period occurs before automatic restart. This behavior is confirmed in Figure 6 of the DC2634A demo manual and applies directly to the DC2634A board under test conditions.

What is the thermal performance of the DC2634A at full load?

At 12V input and 24V/4A output, the DC2634A exhibits a measured temperature rise of 41.4°C above ambient (TA = 25°C, no forced airflow), as shown in Figure 7 of the demo manual. This reflects the high efficiency (>95%) and optimized thermal path of the LTM4656EY#PBF µModule and its PCB layout on the DC2634A board.

Does the DC2634A support burst-mode operation?

Yes - the DC2634A includes JP2 jumpers enabling Burst Mode™ operation (labeled "BURST" on schematic), which improves light-load efficiency by skipping switching cycles. This mode is implemented via the LTM4656's internal control logic and is accessible through the DC2634A's onboard configuration options without component changes.