The AAT1157 1MHz 1.2A Buck DC/DC Converter is a highly efficient switching power IC for single-cell lithium-ion/polymer battery applications. It features a 2.7V to 5.5V input voltage range and a fixed 1MHz switching frequency for low ripple and high efficiency. The AAT1157 features integrated MOSFETs for up to 1.2A of output current, fully integrated compensation for simplified system design, and a Pb-free, 16-pin 3x3mm QFN package.
The AAT1157 is a step-down switching regulator designed for applications requiring fixed frequency and low ripple across full load conditions. It operates from an input voltage range of 2.7V to 5.5V, making it ideal for single-cell lithium-ion or polymer battery applications. The device features fully integrated compensation and internal MOSFETs capable of delivering up to 1.2A.
| Input Voltage Range | 2.7V to 5.5V |
|---|---|
| Output Current | Up to 1.2A |
| Switching Frequency | 1MHz |
| Efficiency | Up to 95% |
| Operating Temperature Range | -40°C to +85°C |
The device operates at a fixed 1MHz switching frequency across all load conditions.
No, the device features fully integrated compensation which simplifies system design.