AAT1219IWP-1-1.2-T1 Integrated Circuits (ICs)

AAT1219IWP-1-1.2-T1 Application Field and Working Principle

AAT1219IWP-1-1.2-T1 is a micropower low input voltage DC to DC converter, providing up to 1.2A of output current, with a wide input voltage range ranging from 2.5V to 5.5V, making it suitable for a wide range of applications. It features extremely low quiescent current and low voltage dropout mode, making it an ideal choice for providing low power regulation in battery-powered applications. Its compact form factor and low input voltage allow it to be used in space-constrained applications, making it an ideal power supply for mobile devices.

Overview

AAT1219IWP-1-1.2-T1 is a DC to DC converter for supplying 1.2A of output current, with a wide input voltage range that ranges from 2.5V to 5.5V. It has extremely low quiescent current and low voltage dropout, making it an ideal choice for providing power regulation in battery-powered applications. It features a base-band frequency of 2.5MHz, allowing it to respond quickly to changes in input conditions, ensuring stable and regulated output power.

Features

• Wide input voltage: 2.5V to 5.5V
• Output current up to 1.2A
• Low quiescent current
• Low voltage dropout
• Base-band frequency of 2.5MHz

Design and Operation

The AAT1219IWP-1-1.2-T1 is a current-mode controlled buck converter. It is designed to be used in low input voltage applications, such as those powered by batteries. It is capable of providing up to 1.2A of output current with a wide input voltage range using a low quiescent current. It utilizes a 2.5MHz base-band frequency to allow it to respond quickly to changes in input conditions and provide a stable, regulated output supply.

The AAT1219IWP-1-1.2-T1 utilizes a simplified architecture to maintain stability and minimize overall design complexity. This allows for the device to be used in cost-sensitive applications. The device is designed to operate in Burst Mode operation, a form of power efficient operation, which enables the device to achieve extremely low quiescent current.

The device utilizes a control loop to maintain a constant output voltage. This is accomplished by the control loop comparing the actual output voltage to the desired voltage and then adjusting the duty cycle accordingly to maintain a constant output voltage. When the output voltage begins to drop below the desired value, the control loop increases the duty cycle to raise the output voltage. When the output voltage begins to rise above the desired value, the control loop reduces the duty cycle to lower the output voltage.

Applications

The AAT1219IWP-1-1.2-T1 is ideal for low power applications with space constraints. It is suitable for the following applications:

• Battery-powered mobile devices
• Portable medical instruments
• Home/Factory automation
• Instrumentation/measuring equipment
• Portable consumer electronics
• Wearable electronics

Conclusion

The AAT1219IWP-1-1.2-T1 is a micropower, low input voltage DC to DC converter, providing up to 1.2A of output current with a wide input voltage range. It features extremely low quiescent current and low voltage dropout mode, which makes it an ideal choice for providing low power regulation in battery-powered applications. Its compact form factor and low input voltage allow it to be used in space-constrained applications, making it an ideal power supply for mobile devices.