Analog Devices Inc. DC383B

Overview

DC383B from Analog Devices (formerly Linear Technology) is a multipurpose evaluation board featuring the LT1930ES5 and LT1931ES5 1.2MHz DC/DC converter ICs. It implements three independent topologies-boost (5V→12V/300mA), SEPIC (10–16V→12V/300mA), and inverting (12V→−12V/350mA)-all leveraging the internal 36V/1A switch and wide input range for space-constrained portable electronics.

For engineers reviewing the DC383B datasheet, DC383B pinout, DC383B application, or DC383B equivalent, this board supports rapid validation of high-frequency switching performance, shutdown functionality, line/load regulation, ripple measurement techniques, and topology-specific design trade-offs across boost, SEPIC, and inverting configurations.

Technical Context

The DC383B integrates three discrete power converter circuits on one PCB, each using either the LT1930ES5 (boost/inverter) or LT1931ES5 (SEPIC) in SOT-23 packages. All circuits operate at a fixed 1.2MHz switching frequency and share identical control logic for enable/shutdown via jumper-controlled grounding of the RUN pin.

Each section provides dedicated Vin, Gnd, and Vout terminals with true-RMS measurement points, and uses external passive components optimized for low output ripple (≤50mV) and stable regulation across full load ranges. No shared power paths or signal coupling exist between the three circuits.

Key Specifications

Availability

DC383B is available at Aetrix Electronics and suitable for digital camera power subsystem validation, cellular phone auxiliary rail development, and LCD display bias supply prototyping requiring stable component supply and repeatable lab characterization.

Supply support for DC383B 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 acquired Linear Technology in 2017 and maintains its legacy portfolio of high-performance analog and power management ICs. The company specializes in precision signal conditioning, power conversion, and interface solutions for demanding applications.

The DC383B belongs to Linear's demonstration circuit series designed explicitly to accelerate adoption of its monolithic DC/DC converters by providing fully tested, application-optimized reference designs with documented measurement procedures and performance boundaries.

FAQ

What is the primary purpose of the DC383B evaluation board?

The DC383B evaluation board is a factory-tested demonstration platform for the LT1930ES5 and LT1931ES5 1.2MHz DC/DC converter ICs. It provides three isolated, ready-to-operate circuits-boost, SEPIC, and inverting-to validate performance, measure regulation and ripple, test shutdown behavior, and evaluate layout practices without custom design effort. DC383B serves as both learning tool and pre-validated reference for system-level integration.

Which ICs are mounted on the DC383B board?

The DC383B board mounts two distinct ICs: the LT1930ES5 in SOT-23 package is used in the boost and inverting converter sections, while the LT1931ES5 in SOT-23 is used in the SEPIC section. Both share identical 1.2MHz switching frequency, 36V/1A internal switch, and shutdown control architecture-but differ in internal compensation and current-sense configuration per topology requirements. DC383B clearly labels each IC location and associated circuit.

How do I enable or disable the converters on the DC383B?

Each converter section on the DC383B features a dedicated "ON/OFF" jumper that controls the RUN pin of the respective LT1930ES5 or LT1931ES5 IC. Placing the jumper in the "ON" position connects RUN to V_IN, enabling normal operation; placing it in the "OFF" position shorts RUN to ground, disabling the internal power switch and halting switching activity. This hardware-based control is consistent across all three circuits on DC383B.

Can the DC383B be used to evaluate load transient response?

Yes, the DC383B supports load transient testing via its accessible Vin, Vout, and Gnd terminals, and includes oscilloscope connection points shown in Figures 1–4 of the Quick Start Guide. Users can apply step loads (e.g., electronic load) and observe output voltage deviation and recovery time. DC383B's fixed-frequency operation and low-ESR output capacitors yield predictable transient behavior representative of actual LT1930ES5/LT1931ES5 implementations.

Where can I obtain design files for the DC383B?

Design files-including schematic, layout Gerber data, and bill of materials-for the DC383B are available directly from Analog Devices (formerly Linear Technology). The Quick Start Guide instructs users to contact the LTC factory to request these files. Aetrix Electronics does not distribute or host these proprietary design resources; customers must engage Analog Devices' technical support or authorized channels to obtain them for derivative design work involving DC383B.