Analog Devices Inc. DC2040A

Overview

DC2040A from Analog Devices (formerly Linear Technology) is a demonstration board built around the LTC3355EUF 20V 1A buck DC/DC converter with integrated supercapacitor charger and backup boost regulator. It delivers regulated 4V/1A output from a 11.2–13.2V input, charges a 3F supercapacitor to 2.4V, and sustains 4W load for ~600ms during input failure-designed for industrial power backup and ride-through applications.

For engineers reviewing the DC2040A datasheet, DC2040A pinout, DC2040A application, or DC2040A equivalent, this page provides verified board-level specifications, functional context, efficiency curves, jumper configuration guidance, and component-level design validation for supercapacitor-based hold-up evaluation.

Technical Context

The DC2040A implements a complete single-board solution for seamless power failover: its LTC3355EUF IC integrates a synchronous buck regulator (12V→4V), constant-current supercapacitor charger (1.0A max), and boost backup stage (VCAP→VOUT). The board supports MODE-selectable PWM/Burst operation and EN_CHG-controlled charging activation.

It features three user-configurable jumpers (JP1–JP3) for MODE, EN_CHG, and PULL-UP PWR selection; real-time monitoring via PFOB (power-fail output), RSTB (reset), and CPGOOD (capacitor good) signals; and validated 4V output regulation at 1A with ≤±1% tolerance under nominal input conditions.

Key Specifications

Availability

DC2040A is available at Aetrix Electronics and suitable for industrial power backup, uninterruptible sensor node supply, and programmable logic controller (PLC) ride-through applications requiring stable component supply and validated reference design fidelity.

Supply support for DC2040A 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. (including legacy Linear Technology products) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and power management ICs for precision instrumentation, industrial, and automotive systems.

The DC2040A belongs to Linear Technology's demonstration board portfolio, designed explicitly to accelerate evaluation of the LTC3355 family's integrated supercapacitor backup architecture in real-world power failover scenarios.

FAQ

What is the primary function of the DC2040A demonstration board?

The DC2040A demonstration board implements a complete, ready-to-test power backup solution using the LTC3355EUF IC. Its primary function is to regulate a 4V/1A output from a 12V input while simultaneously charging a 3F supercapacitor; upon input failure, it autonomously switches to boost mode to sustain the 4V output for approximately 600ms. This behavior is fully validated on the DC2040A hardware and documented in its performance summary and Figure 2 waveform.

Which IC is mounted on the DC2040A board, and what are its key integrated functions?

The DC2040A board features the LTC3355EUF - a 20V, 1A monolithic buck DC/DC converter with three integrated functions: (1) synchronous buck regulation (12V→4V), (2) constant-current supercapacitor charger (up to 1.0A), and (3) backup boost regulator (VCAP→VOUT). All control logic, current sensing, and protection circuitry reside within this single U1 package, eliminating external controllers or discrete charge management components on the DC2040A layout.

How long can the DC2040A maintain output during input power loss, and under what conditions?

The DC2040A maintains 4V output for approximately 600ms when the 12V input fails, delivering 4W (1A × 4V) continuously. This duration is measured with the ESHSR-0003C0-002R7 3F/2.7V supercapacitor charged to its 2.4V float voltage, as shown in Figure 2 of the DC2040A demo manual. Performance scales linearly with load current and is confirmed across multiple test cycles under TA = 25°C ambient conditions.

What are the required jumper settings to enable supercapacitor charging and backup operation on the DC2040A?

To enable full functionality on the DC2040A, set JP1 (MODE) to BURST, JP2 (EN CHARGER) to EN, and JP3 (PULL-UP PWR) to VOUT. These settings configure the LTC3355EUF for burst-mode regulation, activate the 1.0A supercapacitor charge path, and power status LEDs (CPGOOD, RSTB, PFOB) from the regulated 4V output rail. Incorrect jumper states will disable charging or prevent proper failover signaling.

Where can I obtain design files and schematics for the DC2040A demonstration board?

Design files-including schematic, PCB layout, BOM, and Gerber data-for the DC2040A are publicly available at http://www.linear.com/demo. The schematic (Sheet 1 of 1) explicitly identifies U1 as LTC3355EUF and documents all resistor-programmable parameters (e.g., R1 sets current limit, R6/R13 set VOUT). These files are essential for modifying the DC2040A for custom voltage levels, charge currents, or capacitor values.