Maxim Integrated MAX748AEWE+ Step-Down Controller

The Maxim Integrated MAX748AEWE+ is a high-performance, pulse-width modulated (PWM) step-down (buck) controller designed to deliver precise voltage regulation in a compact package. This versatile controller is ideal for converting higher DC input voltages to lower regulated output voltages with high efficiency, making it suitable for a wide range of applications including distributed power systems, portable devices, and telecommunications equipment.

Featuring a wide input voltage range from 4.5V to 23V, the MAX748AEWE+ is capable of driving external MOSFETs to deliver output currents upwards of several amperes, depending on the external components selected. The output voltage is adjustable from 2.5V to the input voltage minus the dropout, allowing for great flexibility in design. Its high-frequency operation (up to 300kHz) enables the use of small, low-cost inductors and capacitors, which reduces the overall footprint and bill of materials for the power supply design.

The MAX748AEWE+ incorporates a variety of features to ensure stable and safe operation. These include programmable soft-start to reduce inrush current during startup, cycle-by-cycle current limit for overcurrent protection, and thermal shutdown to prevent damage from excessive heat. Additionally, it offers a shutdown mode that reduces the supply current to just 15µA, which is particularly beneficial for battery-powered applications where power conservation is critical.

With its high level of integration and performance, the MAX748AEWE+ minimizes the need for external components, simplifying the design process and speeding up time-to-market. The device is available in a 16-pin SOIC package with an extended operating temperature range of -40°C to +85°C, ensuring reliable operation across various environmental conditions.

For designers seeking a robust and efficient voltage regulation solution, the Maxim Integrated MAX748AEWE+ offers a compelling combination of features, performance, and compactness to meet the stringent requirements of modern electronic applications.