Maxim Integrated MAX1686EUB High-Efficiency, Low-IQ, Step-Up DC-DC Converters

The MAX1686EUB from Maxim Integrated is a compact, high-efficiency step-up DC-DC converter designed for portable applications. It is housed in a micro-sized, 10-pin µMAX package, making it an excellent choice for space-constrained applications such as handheld devices. This powerful converter is capable of delivering a fixed or adjustable output voltage from a low-voltage input, which makes it suitable for battery-powered devices where extending battery life is crucial.

The MAX1686EUB operates from an input voltage range of 0.7V to 5.5V, making it versatile for use with single-cell, two-cell, or three-cell alkaline, NiCd, NiMH, and single-cell Li-Ion batteries. It features an internal synchronous rectifier, which enhances its efficiency, especially at higher load currents. This efficiency is further boosted by its low quiescent current (IQ) of only 110µA (typical), thus minimizing battery drain when the device is in standby mode.

One of the key benefits of the MAX1686EUB is its ability to provide a high output current, up to 2A, depending on input/output voltage differential and inductor selection. This makes it suitable for applications that require bursts of power, such as GSM cellular phones. Additionally, its high switching frequency of up to 500kHz allows for the use of small, low-cost inductors and capacitors, reducing the overall footprint and bill of materials for the end product.

For enhanced flexibility, the output voltage of the MAX1686EUB can be set to a fixed value of 3.3V, 5V, or adjusted from 2.5V to 5.5V using two external resistors. This feature allows designers to tailor the output to the needs of their specific application without the need for additional components.

Other features include a low-battery detector, a logic-controlled shutdown mode, and thermal overload protection. These features not only protect the device but also contribute to the safety and reliability of the overall system. Whether for powering LCD displays, microprocessors, or other portable electronics, the MAX1686EUB offers a robust and efficient solution for step-up voltage conversion.