DESCRIPTION

ETA1661 is a wide input range, high efficiency and

high frequency DC to DC step-down switching

regulator, capable of delivering up to 4A of output

current.

It 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,

ETA1661 goes into a PFM mode that saves

switching loss achieving high efficiency. The

adaptive COT control also maintains a constant

switching frequency across line and load. An OVP

function protects the IC itself and its downstream

system against input voltage surges.

ETA1661 is available in a tiny SOT563 package.

FEATURES

 Wide Input Range: 4.5V-18V

 Adaptive COT Control

 Ultra-Fast Load Transient Response

 High Efficiency PFM Mode at Light Load

 Low Rdson Internal Power FETs

 Capable of Delivering up to 4A

 Thermal Shutdown and UVLO

 Available in SOT563

APPLICATIONS

 5G CPE

 Set Top Box

 LCD TV