Maxim Integrated's MAX865EUA-T: A Compact, High-Efficiency Charge Pump

The MAX865EUA-T from Maxim Integrated is a versatile and efficient charge pump DC-DC converter that offers a compact solution for applications requiring voltage inversion or doubling. This integrated circuit is designed to deliver high performance in a small package, making it ideal for space-constrained applications.

The MAX865EUA-T operates from a +1.5V to +5.5V input voltage range, which allows it to be used with a wide range of power sources, from single-cell batteries to standard 3.3V or 5V power supplies. It is capable of generating a -1.5V to -5.5V output for voltage inversion applications or a +3.0V to +11.0V output for voltage doubling, with a maximum output current of 25mA. This flexibility makes it well-suited for portable devices, battery-powered equipment, and other low-power electronics.

One of the key features of the MAX865EUA-T is its high efficiency, which is achieved through a regulated charge pump that uses a 1.2MHz fixed-frequency oscillator. This high switching frequency allows for the use of small external capacitors, reducing the overall footprint of the power supply design. Additionally, the device includes a low-power shutdown mode that reduces the supply current to a mere 1µA, further conserving battery life in portable applications.

The MAX865EUA-T comes in a miniature 8-pin µMAX package, which is highly beneficial for designs where board space is at a premium. Its simple external circuitry, requiring only two capacitors for voltage doubling and four capacitors for voltage inversion, makes it easy to integrate into a variety of designs without the need for complex power management circuitry.

In summary, the MAX865EUA-T is a reliable and efficient choice for designers looking to implement voltage inversion or doubling in their projects. With its wide input voltage range, high efficiency, small form factor, and ease of use, it stands out as a practical solution for a multitude of low-power applications.