LT3472EDD - A Compact Dual Channel Boost and Inverting DC/DC Converter

The LT3472EDD from Linear Technology is a versatile and compact dual-channel DC/DC converter designed for applications requiring simultaneous positive and negative outputs from a single input voltage source. This innovative device integrates two fixed frequency step-up DC/DC converters with one inverting converter to deliver a dual output from an input range of 2.4V to 16V, making it an ideal solution for battery-powered equipment and portable devices.

The LT3472EDD features a unique design enclosed in a small 10-lead DFN package, providing a space-efficient solution for modern electronics where board space is at a premium. Its internal 1.3A switches enable the delivery of up to 200mA of continuous output current at 12V from a 5V input on the boost converter, and a -12V output from the inverting converter, subject to the specific conditions of the application.

One of the key advantages of the LT3472EDD is its fixed frequency operation at 1.2MHz, which allows the use of small surface mount inductors and capacitors. This high switching frequency combined with its internal compensation and soft-start feature minimizes external component count while ensuring a compact and noise-reduced design. Additionally, the device's low quiescent current makes it suitable for battery-powered scenarios, contributing to extended battery life.

The LT3472EDD also includes a shutdown function that reduces the quiescent current to less than 1µA during standby, further enhancing the power efficiency for systems with power-down modes. Its thermal protection and current limiting provide reliable operation under diverse conditions.

Applications for the LT3472EDD are diverse and include OLED displays, CCD bias, small LCD panels, and any portable device that requires both positive and negative voltages generated from a single power source. Its robustness, efficiency, and compact size make it an excellent choice for designers looking to maximize performance while minimizing space and component requirements.

Overall, the LT3472EDD by Linear Technology stands out as a high-performance, dual-output converter that delivers reliability and efficiency, ideal for a wide range of power management applications.