AAT3218IGV-2.8-T1

AAT3218IGV-2.8-T1 Application Field and Working Principle

The AAT3218IGV family of linear voltage regulators is a high-efficient, low-noise, low-dropout solution for low-voltage, low-current power supply applications. The family consists of ultra-low dropout, low-noise linear regulators with a maximum dropout voltage of 1.2V to 2.2V, available over a wide range of input voltage ranges that allow compatibility with a wide array of processing and communications platforms. The linear regulators offer typical efficiencies up to 93%, and enable ultra-low noise voltage conversion for a broad range of applications.

Applications

The AAT3218IGV family of linear voltage regulators is suitable for a wide range of portable and medium-power applications such as cell phones, portable media players, digital cameras and PDAs. The devices are available in a small packages and feature a wide input voltage range, allowing flexibility in design. Moreover, the devices provide a high output accuracy, low quiescent current, and are well suited for energy saving designs. The AAT3218IGV are particularly well-suited for battery-powered handheld designs due to their low noise, low quiescent current and high efficiency.

Working Principle

The AAT3218IGV family operates on a simple principle. The input voltage is applied across the resistor divider, producing a voltage that is proportional to the input voltage. This voltage is compared to a stable reference voltage, the output of which is applied to the pass element or output switch. The output switch is configured such that the voltage is adjusted to match the reference voltage, thus maintaining a constant output voltage.

The AAT3218IGV is designed to provide an output voltage that is with 0.4% accuracy, over a temperature range of -40°C to +85°C. The wide input voltage range allows for flexibility in design, eliminating the need for multiple devices with different input ranges. The output voltage remains constant over line and load conditions, allowing for reliable performance over a wide range of conditions.

Conclusion

The AAT3218IGV family of linear voltage regulators is a low-cost, highly efficient, low-noise, low-dropout solution for low-voltage, low-current power supply applications. The devices are available in a small packages and feature a wide input voltage range, allowing flexibility in design. Moreover, the devices provide a high output accuracy, low quiescent current, and are well suited for energy saving designs. The AAT3218IGV are particularly well-suited for battery-powered handheld designs due to their low noise, low quiescent current and high efficiency.