MAX755ESA+

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Voltage regulators are devices that ensure that electronic systems receive power of a specific and stable voltage. DC-DC switching voltage regulators are specifically designed to change the input voltage to another specific output voltage. The MAX755ESA+ is one such device and is used in a variety of applications, including portable computers, network interfaces, modems, cell phones, laser printers and hand-held scanning devices.

MAX755ESA+ Application Field

The MAX755ESA+ offers high power conversion efficiency, low output voltage ripple and is suitable for applications ranging from 1.3V up to 5V outputs. It is a proven bridge solution for portable computing, networking and communications applications. Its wide input range of 3.3V to 17V makes it suitable for most portable power supplies.

The MAX755ESA+ features a wide range of operating modes and switching frequencies, making it very versatile for battery-powered design. It also has adjustable current limit and low dropout voltage to ensure maximum system efficiency even with low-voltage conditions. Additionally, its high switching frequency allows the use of tiny inductors, capacitors and resistors, making board layout very easy.

The device is also power-efficient, with current economy techniques like pulse frequency modulation (PFM) and pulse width modulation (PWM) switching techniques. It also integrates thermal shutdown and tracking protection, making it suitable for safety-critical applications in which reliability is paramount.

MAX755ESA+ Working Principle

The MAX755ESA+ has two main functions - to convert the input voltage to the output voltage, and to regulate the output current. When the oscillator of the device is activated, the internal control logic will start to consider the input voltage and output current and decide the size of the pulse to be used to control the circuitry.

The device uses a push-pull approach for power conversion. This means that when the input voltage is applied, a pulse of current is sent through the switching transistor, causing the inductor to store energy. When the impedance of the inductor changes, the stored energy is dispatched through the other switching transistor to transform the voltage. As the charge accumulates, the capacitors facilitate efficient energy storage and regulation. Finally, the output voltage is regulated, and the result is the steady output required.

Conclusion

The MAX755ESA+ is a very versatile and efficient DC-DC switching voltage regulator. It has a valid input range from 3.3V to 17V and output range from 1.3V to 5V. It has several features like adjustable current limit, power-saving techniques, thermal shutdown, and tracking protection, making it suitable for safety-critical applications. It is suitable for a variety of applications due to its high power conversion efficiency, low ripple, and a wide range of operating frequencies.

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