Analog Devices Inc. DC2383A-B

Overview

DC2383A-B from Analog Devices is a demonstration board for the LTC3644-2 quad synchronous step-down regulator, enabling evaluation of four independent 1.25A DC/DC channels with input range 2.7V–17V, fixed 2.25MHz switching frequency, and default output voltages of 1.2V, 3.3V, 2.5V, and 1.8V. It supports phase-shifted operation, Burst Mode®/FCM/PS mode selection, and reconfiguration into dual 2.5A or triple 2.5A/1.25A/1.25A outputs.

For engineers reviewing the DC2383A-B datasheet, DC2383A-B pinout, DC2383A-B application, or DC2383A-B equivalent, this demo board provides validated reference design files, thermal performance data at 1.25A per channel, load transient response waveforms, efficiency curves at 5V input, and configurable input voltage isolation per channel - all critical for power architecture validation in multi-rail embedded systems.

Technical Context

The DC2383A-B implements the LTC3644-2 IC in a 36-lead 5mm × 5mm BGA package, featuring constant-frequency peak-current-mode control with internal compensation, 60ns typical minimum on-time, and independent RUN/PGOOD per channel. It supports 0° or 180° inter-channel phase shift to reduce input ripple and enable multiphase configurations.

Onboard 0Ω jumpers allow flexible reconfiguration: VIN2/VIN3/VIN4 can be isolated from VIN1 for independent input supplies; SW1/SW2 and SW3/SW4 can be paralleled for dual-output mode; FB2/FB3 can be tied to INTVCC to disable channels; and MODE/SYNC accepts external clock synchronization or duty-cycle-modulated phase control.

Key Specifications

Availability

DC2383A-B is available at Aetrix Electronics and suitable for multi-rail power system validation, FPGA core/I/O rail sequencing, industrial PLC I/O module development, and telecom baseband board bring-up requiring stable component supply and rapid prototyping capability.

Supply support for DC2383A-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The DC2383A-B belongs to Analog Devices' Linear Technology demonstration board product line, designed specifically to accelerate evaluation and adoption of their high-efficiency, multi-output DC/DC regulators in demanding power-constrained applications.

FAQ

What is the primary function of DC2383A-B?

The DC2383A-B is a fully assembled and tested demonstration board for the LTC3644-2 quad synchronous step-down regulator. Its purpose is to provide engineers with a ready-to-use platform to evaluate electrical performance-including efficiency, thermal behavior, load transients, and mode switching-without designing custom PCBs. The DC2383A-B includes onboard test points, jumpers, and configuration options to validate real-world use cases before integration into end equipment.

Can DC2383A-B support different input voltages for each output channel?

Yes, DC2383A-B supports independent input voltages per channel. By removing onboard 0Ω jumpers R31 (VIN1→VIN2), R29 (VIN1→VIN3), and R30 (VIN1→VIN4), users can apply separate input supplies to VIN2, VIN3, and VIN4 test points while maintaining VIN1 as the main input. SVIN must remain connected to the highest input voltage present to ensure proper internal LDO biasing. This capability allows DC2383A-B to emulate heterogeneous power domains common in complex SoC or FPGA systems.

How do I configure DC2383A-B for dual 2.5A outputs?

To configure DC2383A-B for dual 2.5A outputs, tie SW1/SW2 and SW3/SW4 together, remove inductors L2 and L3, retain L1 and L4, tie FB2 and FB3 to INTVCC, float PGOOD2 and PGOOD3, tie RUN1/RUN2 and RUN3/RUN4, and connect PHASE to INTVCC. This merges channels 1+2 into one 2.5A rail and channels 3+4 into another 2.5A rail. The DC2383A-B schematic and Section 9 of the demo manual provide exact jumper and component modification instructions for this configuration.

What are the supported switching modes on DC2383A-B?

DC2383A-B supports three operating modes via the MODE/SYNC pin: Burst Mode® (high light-load efficiency), pulse-skipping (PS) mode (moderate ripple/efficiency trade-off), and forced continuous conduction mode (FCM) (lowest output ripple, preferred for noise-sensitive circuits). Mode selection is implemented using JP3 (MODE/PLLIN) and onboard resistors; external clock synchronization is also possible by applying a signal to CLKIN (E10) while setting JP3 to CLKIN position.

Is thermal performance data available for DC2383A-B?

Yes, thermal performance data for DC2383A-B is published in Figure 4 of the demo manual: at VIN = 5V, fSW = 2.25MHz, and 1.25A per channel, junction temperature rise is measured under natural convection (no heatsink, no forced airflow) at TA = 25°C. The data confirms stable operation across all four outputs without thermal shutdown, validating the board's copper layout and thermal vias for sustained 5W total output power in compact space-constrained designs.