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ETA3521
2MHz, 4A, COT Synchronous Step-down Converter in SOT563
DESCRIPTION
FEATURES
The ETA3521 is a high-efficiency, DC-to-DC step-down switching regulator, capable of delivering up to 4A of output current. The devices operate from an input voltage range of 2.5V to 6.0V and provide output voltages from 0.6V to VIN, making the ETA3521 ideal for low voltage power conversions. ETA3521 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, ETA3521 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.