Analog Devices Inc. DC1219A-D

Overview

DC1219A-D from Analog Devices (formerly Linear Technology) is a demonstration board for the LT3495B-1 micropower low-noise boost converter with integrated output disconnect, designed to convert 3V–6V input to regulated 15V output at up to 36mA. It features non-audible switching frequency, single-resistor output sensing, and dimming control, targeting OLED power supplies in portable audio devices.

For engineers reviewing the DC1219A-D datasheet, DC1219A-D pinout, DC1219A-D application, or DC1219A-D equivalent, this board enables rapid evaluation of LT3495B-1 performance-including output ripple (<10mV), efficiency (82.5–84.5%), and input range (3–6V)-in space-constrained, low-noise bias supply designs.

Technical Context

The DC1219A-D implements the LT3495B-1 IC in a fixed 15V output configuration using external compensation and feedback resistors. It supports output disconnect during shutdown and dimming via PWM or DC voltage on the CTRL pin, with operation across full load range without audible noise.

This demo board uses a 0805-size inductor and ceramic output capacitor to minimize EMI and footprint. Input and output voltage rails are accessible via test points and screw terminals, enabling direct probing of ripple, regulation, and transient response under varying loads.

Key Specifications

Availability

DC1219A-D is available at Aetrix Electronics and suitable for OLED display bias, portable audio power, and low-noise analog supply applications requiring stable component supply and fast evaluation turnaround.

Supply support for DC1219A-D 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 high-performance power management portfolio. The company specializes in precision analog, power, and RF solutions for demanding industrial and portable applications.

The DC1219A-D belongs to Linear's demonstration circuit series for DC/DC converters, developed specifically to accelerate validation of micropower, low-noise boost architectures in size- and noise-sensitive consumer electronics.

FAQ

What is the primary function of the DC1219A-D demonstration board?

The DC1219A-D demonstration board is a fully assembled and tested platform for evaluating the LT3495B-1 micropower boost converter. It delivers a regulated 15V output from a 3V–6V input source at up to 36mA, with features including output disconnect, dimming control, and non-audible switching-making it ideal for validating OLED bias and low-noise analog supply designs before custom PCB integration.

Does the DC1219A-D support adjustable output voltage?

No, the DC1219A-D is configured for a fixed 15V output using factory-set feedback resistors per the LT3495B-1 datasheet. While the underlying LT3495B-1 IC supports adjustable output via external resistor divider, the DC1219A-D board itself is not user-adjustable without modifying the feedback network-no onboard potentiometer or jumper options are provided for voltage tuning.

How does the DC1219A-D implement output disconnect?

The DC1219A-D leverages the integrated MOSFET and control logic of the LT3495B-1 to physically disconnect the output from the inductor and switch node during shutdown. This prevents reverse current flow and ensures zero output leakage when disabled-critical for preserving battery charge in always-on portable systems using the DC1219A-D as a bias supply.

Can the DC1219A-D be used with a 3.3V input source?

Yes, the DC1219A-D operates reliably with a 3.3V input, as confirmed by its specified 3V–6V input range. At 3.3V input and 36mA load, the board maintains 15V output regulation within ±2.7% (14.6–15.4V) and achieves ≥82.5% efficiency-making it compatible with standard 3.3V system rails derived from LDOs or buck converters feeding the DC1219A-D.

Is thermal performance documented for the DC1219A-D under full load?

Yes, the DC1219A-D maintains safe operating temperatures at 36mA continuous load with no forced airflow. Measured junction temperature rise above ambient is <25°C, enabled by the LT3495B-1's thermally enhanced DDB package and the board's optimized copper pour on the switch node and GND plane-ensuring stable operation in enclosed handheld enclosures where the DC1219A-D is deployed.