Analog Devices Inc. DC480A-A

Overview

DC480A-A from Analog Devices is a demonstration board built around the LTC3405A monolithic synchronous buck regulator IC, delivering up to 300mA at output voltages adjustable down to 0.6V, operating from 2.5V–5.5V input, with 1.5MHz fixed switching frequency and Burst Mode™ operation enabling 25µA no-load quiescent current - ideal for battery-powered handheld devices requiring compact, low-noise DC/DC conversion.

For engineers reviewing the DC480A-A datasheet, DC480A-A pinout, DC480A-A application, or DC480A-A equivalent, key selection considerations include its support for both pulse-skipping and Burst Mode™ via JP1, shutdown control via JP2, VIN/VOUT turret layout, SOT-23-6 footprint validation, and compatibility with low-profile external components due to high-frequency operation.

Technical Context

The DC480A-A implements the LTC3405A's internal 1.5MHz oscillator and synchronous rectification to achieve high efficiency across light-to-moderate loads. Its MODE pin (JP1-selectable) directly controls mode transition between pulse-skipping and Burst Mode™, while RUN pin (JP2-controlled) enables hard shutdown with <1µA supply current.

Input voltage is applied via right-side turrets (VIN/GND), output extracted from left-side turrets (VOUT/GND), and all critical regulator signals - including FB, MODE, and RUN - are accessible via test points or jumper positions, supporting real-time performance characterization under varying load and input conditions.

Key Specifications

Availability

DC480A-A is available at Aetrix Electronics and suitable for battery-powered portable instrumentation, wearable health monitors, and ultra-low-power IoT sensor nodes requiring stable component supply and validated reference design implementation.

Supply support for DC480A-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 is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The DC480A-A belongs to Analog Devices' demonstration board portfolio for power management ICs, designed specifically to accelerate evaluation and adoption of their high-efficiency, high-frequency DC/DC regulators in space-constrained applications.

FAQ

What is the primary function of the DC480A-A demonstration board?

The DC480A-A demonstration board is a fully assembled and tested platform for evaluating the LTC3405A synchronous buck regulator. It provides immediate access to input/output turrets, mode selection jumpers (JP1), shutdown control (JP2), and test points - enabling rapid characterization of efficiency, transient response, and noise performance without custom PCB development. The DC480A-A validates real-world behavior of the DC480A-A under defined operating conditions.

How do I configure the DC480A-A for Burst Mode™ operation?

To enable Burst Mode™ on the DC480A-A, insert the JP1 jumper into the upper position, connecting the MODE pin to ground. This configuration reduces light-load quiescent current to 25µA and minimizes switching noise - critical for noise-sensitive analog or RF sections. Leaving the MODE pin floating is prohibited per the DC480A-A design guidelines.

What is the maximum input voltage rating for the DC480A-A?

The DC480A-A supports an absolute maximum input voltage of 6V, as defined by the LTC3405A's ratings. Exceeding this limit - including during hot-plug events - risks permanent damage to the DC480A-A board and its onboard regulator. Input must be applied only after verifying correct polarity and voltage level prior to connection.

Can the DC480A-A be used to evaluate different output voltages?

Yes - the DC480A-A uses a standard resistor divider on the FB pin, allowing output voltage adjustment by replacing R1 and/or R2. The default configuration delivers 1.2V, but the DC480A-A schematic and layout support rework for outputs from 0.6V to VIN – 0.3V, maintaining regulation accuracy and stability per LTC3405A specifications.

Is Gerber file access available for the DC480A-A?

Yes - Gerber files for the DC480A-A demonstration board are available directly from Analog Devices upon request. These files include full PCB layer data, solder mask, silkscreen, and drill information, enabling replication, modification, or integration into custom carrier systems. Contact the LTC Factory for formal release of DC480A-A Gerber data.