Maxim Integrated MAX851ESA+T Charge Pump Voltage Inverter

The MAX851ESA+T from Maxim Integrated is a highly efficient charge pump voltage inverter designed to provide a simple and compact power conversion solution. This device is perfect for applications that require a negative voltage rail generated from a positive input voltage. With its ability to convert a positive voltage in the range of 2.7V to 5.5V to a corresponding negative voltage, it offers versatility for various electronic designs.

The MAX851ESA+T comes in a small 8-pin SOIC package, making it ideal for space-constrained applications. The device operates with a switching frequency of 35kHz, which allows for small external capacitors, thereby reducing the overall footprint and component cost. Its high conversion efficiency ensures minimal power loss, making it suitable for battery-operated devices.

An important feature of the MAX851ESA+T is its no-load quiescent current, which is typically 110µA, further dropping to just 20µA in shutdown mode. This low power consumption extends battery life in portable devices. Additionally, the charge pump is capable of delivering up to 25mA of output current, sufficient for powering small to medium-sized loads.

The device incorporates thermal overload protection, which safeguards the charge pump against excessive temperatures that could potentially damage the integrated circuit. Furthermore, the built-in oscillator circuitry eliminates the need for an external frequency-setting resistor or capacitor, simplifying the design and reducing external component count.

The MAX851ESA+T is a reliable and cost-effective solution for generating a negative voltage rail in various applications, including LCD bias supplies, operational amplifier power supplies, and portable communication devices. Its ease of use, combined with high efficiency and low power consumption, make it an excellent choice for designers looking to optimize their power management solutions.