Maxim Integrated MAX845ESA+ Monolithic Charge-Pump Voltage Converter

The Maxim Integrated MAX845ESA+ is a highly versatile and efficient monolithic charge-pump voltage converter designed to meet the needs of a wide range of applications. This compact device is capable of converting a positive voltage in the range of 2.0V to 5.5V to the corresponding inverted negative voltage, making it an ideal choice for powering devices that require a dual supply from a single positive supply source.

Key Features:

• Input Voltage Range: The MAX845ESA+ operates with an input voltage range from 2.0V to 5.5V, accommodating a variety of low-power devices and battery-operated applications.
• High Efficiency: With a unique charge-pump design, the device achieves a high power efficiency, which is crucial for prolonging battery life in portable electronics.
• Low Power Consumption: It features a quiescent current of only 120µA, making it an energy-saving solution for power-sensitive designs.
• Output Voltage: The converter generates an inverted output voltage (-V_IN) which is almost equal to the magnitude of the input voltage, providing a simple and effective solution for generating a negative rail.
• Output Current: Capable of delivering up to 25mA of output current, the MAX845ESA+ is suitable for a variety of applications, including operational amplifier power supplies and bias voltages.
• Compact Package: Available in an 8-pin SOIC package, it occupies minimal board space and is compatible with standard surface-mount manufacturing processes.
• Thermal Overload Protection: The device includes thermal overload protection, which helps to prevent damage from overheating during high-load conditions.

Applications:

The MAX845ESA+ is perfect for applications that require a negative voltage rail such as LCD bias supplies, portable communication devices, data acquisition systems, and op-amp power supplies. Its small footprint and high efficiency make it a popular choice for portable and space-constrained electronic designs.

Summary:

In summary, the Maxim Integrated MAX845ESA+ charge-pump voltage converter is a reliable and efficient solution for generating a negative voltage rail from a positive input. Its wide input voltage range, low power consumption, and compact size make it an excellent choice for designers looking to enhance their power management schemes in a variety of electronic products.