Maxim Integrated's MAX738EPA: Charge-Pump Voltage Inverter

The MAX738EPA is a high-efficiency, low-power charge-pump voltage inverter designed by Maxim Integrated. This compact and versatile integrated circuit (IC) is engineered to convert a positive voltage in the range of +1.5V to +5.5V to the corresponding negative voltage of the same magnitude. It stands out for its ability to deliver up to 25mA of output current with a typical voltage drop of only 0.5V at 20mA load, making it an ideal solution for portable and battery-powered applications where power efficiency is crucial.

One of the key features of the MAX738EPA is its on-chip oscillator that operates at a switching frequency of 10kHz. This allows for the use of small, low-cost capacitors, reducing the overall size and cost of the power supply design. Additionally, the device includes an oscillator control pin (OSC) that can be used to either shut down the oscillator and reduce the supply current to 0.1µA for power saving or to synchronize the oscillator to an external clock source.

The MAX738EPA comes in an 8-pin DIP (Dual In-line Package), which is well-suited for through-hole PCB mounting, making it easy to integrate into a variety of designs. It is also available in other package options, including SO (Small Outline) and µMAX, catering to different design and space requirements.

This charge-pump voltage inverter is designed with protection features such as short-circuit and thermal overload protection, ensuring reliable performance and longevity of the device. Its robust design makes it an excellent choice for diverse applications, including LCD bias generation, op-amp power supplies, and isolated RS-232 power supplies, among others.

Overall, the MAX738EPA by Maxim Integrated is a versatile, efficient, and reliable solution for generating a negative voltage rail in compact electronic systems. Its ease of use, coupled with its power-saving features, makes it an excellent choice for designers looking to enhance their power management solutions.