Linear Technology LT3519IMS#PBF Overview

The LT3519IMS#PBF is a high-performance, fixed-frequency step-up DC/DC converter integrated circuit from Linear Technology, designed to drive LEDs with a constant current. This versatile component is ideal for applications requiring high brightness and accurate current control, such as automotive and industrial lighting, display backlighting, and general-purpose LED illumination.

Key Features

• Wide Input Voltage Range: The device operates from an input voltage range of 3V to 30V, making it suitable for a variety of power supplies, including single-cell Li-Ion batteries to automotive inputs.
• Adjustable Switching Frequency: Its switching frequency can be programmed between 330kHz and 2.5MHz, allowing designers to optimize efficiency while minimizing external component sizes.
• Integrated Boost Diode: The LT3519IMS#PBF includes an internal boost diode, which simplifies the circuit design and reduces external component count.
• Constant-Current and Constant-Voltage Regulation: It offers both constant-current and constant-voltage regulation, making it adaptable for driving LEDs and for applications requiring a regulated voltage supply.
• True Color PWM Dimming: It supports True Color PWM dimming, which delivers constant LED color with deep dimming capability.

Protection Features

• Open LED Protection: To prevent damage, the device provides open LED protection that limits the output voltage during open-circuit conditions.
• Short-Circuit Protection: It also features short-circuit protection, ensuring reliable operation in the event of an output short.
• Thermal Protection: The LT3519IMS#PBF is equipped with thermal protection to prevent overheating, enhancing the longevity and reliability of the application.

Package and Applications

The LT3519IMS#PBF comes in a compact 10-lead MSOP package with a thermally enhanced exposed pad. Its small footprint and high level of integration make it an excellent choice for space-constrained applications. With its robust feature set, the LT3519IMS#PBF is a versatile solution for a wide range of LED driving applications requiring precise control, flexibility, and high efficiency.