ETA3515

The ETA3515 is a high-efficiency, DC-to-DC step-down switching regulator, capable of delivering up to 3A of output current. The device operates from an input voltage range of 2.5V to 5.5V and provides output voltages from 0.6V to VIN, making the ETA3515 ideal for low voltage power conversions. ETA3515 adopts an adaptive COT control scheme that enables very fast transient response and provides a very smooth transition when the output varies from light load to heavy load. During light load, ETA3515 goes into a PFM mode that saves switching loss to achieve a high efficiency. The adaptive COT control also maintains a constant switching frequency across line and load. Running at a fixed frequency of 2MHz allows the use of small inductance value and low DCR inductors, thereby achieving a higher efficiency. Other external components, such as ceramic input and output caps, can also be small due to higher switching frequency, while maintaining exceptional low-noise output voltages. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protection improves design reliability.