Linear Technology's LT1618EDD Step-Up DC/DC Converter

The LT1618EDD is a compact, high-performance step-up DC/DC converter from Linear Technology, designed to meet the demands of a wide array of power supply applications. This efficient device is capable of driving up to 1.4A of output current from a single-cell Lithium-Ion battery, despite its small form factor, making it an ideal solution for portable applications.

At the heart of the LT1618EDD lies a 1.4MHz fixed frequency PWM architecture, which facilitates the use of small, low-cost capacitors and inductors, reducing the overall footprint and cost of the power supply design. The high switching frequency also enables fast transient response, ensuring stable operation even under dynamic load conditions.

This versatile converter features a wide input voltage range from 1.8V to 18V, making it compatible with a variety of power sources, from single-cell batteries to multi-cell battery stacks and wall adapters. The output voltage is adjustable from 1.25V to the limit set by the maximum duty cycle, providing flexibility to power a broad range of devices.

The LT1618EDD incorporates several protection features to ensure reliable operation. These include soft-start capability, which limits inrush current during startup, and a current limit function that protects the device against overcurrent conditions. Additionally, thermal shutdown protection is integrated to prevent overheating, thereby safeguarding the converter and the overall system.

One of the key benefits of the LT1618EDD is its low quiescent current, which is crucial for battery-powered applications where extending battery life is of paramount importance. The device also supports a shutdown mode, reducing the supply current to less than 1µA, further enhancing its suitability for power-sensitive applications.

Packaged in a low-profile (0.75mm) 10-lead DFN (3mm × 3mm) package, the LT1618EDD is designed for space-constrained applications, offering a minimal footprint solution without compromising on performance. Whether it's for handheld devices, GPS units, or portable media players, the LT1618EDD is an excellent choice for designers seeking a compact, efficient, and versatile step-up converter.

For detailed technical specifications, application notes, and support documentation, designers are encouraged to visit Linear Technology's website or contact their technical support team.