MAX8756ETI+T Datasheet/PDFThe MAX8756ETI+T application field falls under the group of Power Management ICs (PMICs) Voltage Regulators Special Purpose. The device is ideal for use in cellular handsets, notebooks, digital audio players, digital cameras, and other small form factor products. The MAX8756ETI+T is a compact, high precision, low noise, low output ripple, and fast transient response regulator featuring up to 1.2A of current drive capability and comprehensive safety features.
Working Principle
The MAX8756ETI+T works using a voltage regulation method where a voltage divider is used to sense the output voltage of the regulator. The output voltage of the regulator is given by the equation: Vout = (R1 + R2) x Vref / R1 where Vref is the voltage reference set by the regulator and R1 and R2 are the resistors in the voltage divider network. By adjusting the ratio of the two resistors, different output voltages can be achieved.
The MAX8756ETI+T also features a current sensing regulation method. In this method, the regulator measures the amount of current flowing through the output pin and adjusts the output voltage accordingly in an effort to maintain a constant load current. The regulator is designed to regulate the output voltage within a linear region; outside of this region, the output voltage will start to fall as the load current increases.
The MAX8756ETI+T also includes a slew control feature. This feature helps to control the rate at which the output voltage transitions from one set point to the other. This feature helps to minimize voltage transients that may be caused by sudden changes in load current. The MAX8756ETI+T also includes other features such as under voltage lockouts, cycle-by-cycle current limit, and thermal shutdown. These additional features help to ensure a safe and robust performance for the regulator.
Conclusion
The MAX8756ETI+T is a compact and highly efficient voltage regulator designed for use in applications such as cellular handsets, notebooks, digital audio players, and digital cameras. The device uses a voltage regulation method and a current sensing regulation method to maintain a constant output voltage. The regulator also includes additional features such as slew control, under voltage lockout, cycle-by-cycle current limit, and thermal shutdown to further enhance its performance and reliability.