Maxim Integrated's MAX1687EUE+: High-Efficiency, USB/AC Adapter, Step-Up DC-DC Converters

The MAX1687EUE+ from Maxim Integrated is a sophisticated and highly efficient step-up DC-DC converter specifically designed to meet the power requirements of USB-powered devices and systems that are also supplemented by AC adapters. This converter is a vital component for applications requiring a regulated power supply from a low-voltage source.

One of the key features of the MAX1687EUE+ is its ability to automatically transition between USB and AC adapter power sources without interruption. This seamless switching capability ensures that the device maintains a consistent output voltage regardless of the input power source, making it an ideal solution for portable electronics that need to operate in various environments.

The device operates with an input voltage range from 0.7V to 5.5V, making it versatile for various low-voltage applications. It is capable of delivering a fixed output voltage of 5V or an adjustable output voltage from 2V to 5.5V, which can be set using external resistors. This flexibility allows designers to use the MAX1687EUE+ in a broad range of products.

Efficiency is a standout aspect of the MAX1687EUE+, with its ability to reach up to 96% efficiency through its internal 2A, 0.18Ω switch. Additionally, it incorporates a low quiescent current, further enhancing its energy-saving capabilities, which is particularly important for battery-operated devices.

The MAX1687EUE+ also includes a variety of protective features to ensure the safety and longevity of the end product. These features include thermal overload protection, which prevents the device from overheating, and a soft-start function that minimizes inrush current during startup. Furthermore, the converter has a logic-controlled shutdown mode, which reduces the supply current to a mere 1µA, thereby conserving battery life when the device is not in use.

Available in a 16-pin TSSOP package, the MAX1687EUE+ is designed to occupy minimal space on a PCB, making it suitable for compact and portable applications such as PDAs, cell phones, digital cameras, and other USB-enabled devices that require efficient power management.

With its combination of high efficiency, flexible power source compatibility, and protective features, the MAX1687EUE+ is a reliable and versatile choice for designers looking to enhance the performance and user experience of their products.