MAX1044CSA+T

The MAX1044CSA+T is an advanced, wide-input-voltage range synchronous-rectified step-down switching regulator, ideal for low-cost, low-input-voltage applications. It is specifically designed to reduce external component count, size and cost while providing reliable output voltage regulation. This regulator is comprised of two parts, a controller IC and an external MOSFET, and provides excellent efficiency over a wide output current range.

Application Field

The MAX1044CSA+T is suitable for many applications, such as mobile devices, point-of-load (POL) power supplies, and power management ICs, especially those requiring low voltage outputs. This regulator offers conversion efficiencies up to 96% and operates from input voltages of up to 28V, making it ideal for applications with a wide input range, allowing for maximum flexibility and cost savings. Other features such as 1.5A peak current limit, soft-start and enhanced thermal protection also make it suitable for automotive, industrial, and lighting applications.

Working Principle

The MAX1044CSA+T is a synchronous-rectified step-down switching regulator that uses a fixed-frequency, peak current-mode control architecture. An external MOSFET provides the output current and is controlled by two regulation comparators. One comparator senses the output voltage while the other senses the input voltage. The MAX1044CSA+T also has a low-noise spread-spectrum modulator which causes a 180kHz sinusoidal current to modulate the output frequency of the regulator to reduce EMI noise.

The output voltage of the regulator is set by an external resistor divider from the output voltage. By changing the external resistor value, the output voltage of the regulator can be changed to suit the application needs. The MAX1044CSA+T also includes advanced features such as Power Save Mode to reduce output power losses during no-load or light-load conditions and undervoltage lockout (UVLO) to prevent the IC from being damaged when the input voltage is too low.

Conclusion

The MAX1044CSA+T is an advanced synchronous-rectified step-down switching regulator which provides excellent efficiency, wide input-voltage range and maximum flexibility and cost savings. Its compact size and high level of integration makes it an ideal choice for a variety of applications, from mobile devices to point-of-load power supplies and automotive and industrial applications. The MAX1044CSA+T is a perfect fit for applications requiring low voltage outputs with high efficiency, low external component count and cost savings.