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