Analog Devices Inc. DC1219A-B

Overview

DC1219A-B from Analog Devices (formerly Linear Technology) is a demonstration board for the LT3495B micropower low-noise boost converter with integrated output disconnect, designed to convert 3V–6V input to a regulated 15V output at up to 75mA. It features non-audible switching frequency, single-resistor output sensing, and dimming control - optimized for OLED power supplies in portable audio devices.

For engineers reviewing the DC1219A-B datasheet, DC1219A-B pinout, DC1219A-B application, or DC1219A-B equivalent, this board enables rapid evaluation of LT3495B's efficiency (83.5% @ 6V_IN/75mA), output ripple (≤10mV), and low-noise regulation in space-constrained bias supply designs.

Technical Context

The DC1219A-B implements the LT3495B IC in a fixed 15V output configuration using external compensation and feedback resistors. It supports input voltages from 3V to 6V and delivers stable output under load variations up to 75mA while maintaining ≤10mV peak-to-peak output ripple.

Its design incorporates output disconnect via an internal MOSFET switch, enabling true load isolation during shutdown, and includes dimming control capability for adjustable output voltage scaling - critical for OLED display brightness management without external DACs.

Key Specifications

Availability

DC1219A-B is available at Aetrix Electronics and suitable for OLED power supplies, portable audio bias rails, and low-noise analog front-end biasing requiring stable component supply and validated reference design integration.

Supply support for DC1219A-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 acquired Linear Technology in 2017 and maintains its high-performance power management portfolio, emphasizing precision, low-noise, and micropower operation for demanding analog and mixed-signal applications.

The DC1219A-B belongs to Linear's demonstration circuit series for boost converters, specifically engineered to validate LT3495B performance in compact, noise-sensitive power delivery scenarios such as portable displays and audio systems.

FAQ

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

The DC1219A-B demonstration board is a fully assembled and tested platform for evaluating the LT3495B micropower boost converter. It provides a ready-to-use 15V output from 3V–6V inputs at up to 75mA, with built-in output disconnect and dimming control. Engineers use DC1219A-B to verify regulation accuracy, ripple performance, and efficiency before integrating the LT3495B into final designs.

Does the DC1219A-B support adjustable output voltage?

No - the DC1219A-B is configured for a fixed 15V output using factory-set feedback resistors. While the underlying LT3495B IC supports adjustable outputs via external resistor dividers, DC1219A-B's layout and component selection lock V_OUT to 15V ±0.4V. To evaluate variable output, users must modify the feedback network or refer to the LT3495B datasheet for design guidance.

How does the output disconnect feature operate on the DC1219A-B?

The DC1219A-B implements the LT3495B's integrated output disconnect by controlling an internal MOSFET that isolates the output capacitor from the load during shutdown. When EN is pulled low, the output drops to near 0V with no reverse current flow - preserving battery charge and preventing unintended load activation. This behavior is verified on DC1219A-B using JP1 in Run mode and controlled enable sequencing.

Can the DC1219A-B be used with input sources below 3V?

No - the DC1219A-B is validated only for 3V to 6V input operation, matching the LT3495B's specified operating range. Attempting to power DC1219A-B below 3V may result in failure to start, unstable regulation, or excessive dropout. For sub-3V applications, consider alternative boost controllers or evaluation boards designed for lower VIN, such as those based on LT3495-1 variants.

Is the DC1219A-B RoHS-compliant and lead-free?

Yes - DC1219A-B conforms to RoHS Directive 2011/65/EU and uses lead-free solder and components throughout. The board carries Analog Devices' standard environmental compliance markings, and all PCB materials, passives, and the LT3495B IC are qualified for lead-free reflow assembly. Full compliance documentation is available upon request from Aetrix Electronics.