Maxim Integrated MAX681CPD Charge Pump Voltage Converter

The Maxim Integrated MAX681CPD is a high-efficiency, charge pump voltage converter that provides a simple and compact solution for applications requiring voltage inversion. This versatile integrated circuit (IC) is designed to convert a positive voltage in the range of 1.5V to 5.5V to the corresponding negative voltage, making it ideal for powering devices that require a dual supply voltage from a single positive supply.

The MAX681CPD operates with a switching frequency of 10kHz to 100kHz, which is set by an external capacitor. This flexibility allows designers to optimize the converter for size, efficiency, or output ripple. The IC can deliver up to 100mA of output current, making it suitable for small to medium power applications.

One of the key features of the MAX681CPD is its low quiescent current, typically only 180µA, which is beneficial for battery-powered devices where power efficiency is critical. Additionally, the device includes thermal overload protection, ensuring reliable operation under various conditions.

The IC comes in a 14-pin plastic DIP package, which is easy to integrate into a wide range of electronic circuits. Its compact size and minimal external component requirements make it an excellent choice for space-constrained applications such as portable devices, battery-operated equipment, and small power supplies.

For design flexibility, the MAX681CPD also includes an onboard oscillator, eliminating the need for an external clock source. Its simple and elegant charge pump design does not require inductors, which reduces noise and simplifies layout. The device's built-in power MOSFETs provide high efficiency and reduce the need for external components.

In summary, the Maxim Integrated MAX681CPD is a reliable and efficient solution for generating a negative voltage from a positive input. Its ease of use, low power consumption, and small package size make it an excellent choice for designers looking to simplify their power supply design while maintaining performance and reliability.