ETA1661FSG datasheet(1/8 Pages) ETA

Part #	ETA1661FSG

Description	18V, 4A, High Efficiency Synchronous Step-Down Converter in SOT563

PDF	8 Pages

Scroll/Zoom	100%

Manufacturer	ETA [ETA SOLUTIONS CO. LIMITED]

Direct Link	http://www.etasolution.com

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ETA1661

www.etasolution.com

1

Empowering Thinkers

18V, 4A, High Efficiency Synchronous Step-Down Converter

in SOT563

DESCRIPTION

FEATURES

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.



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

TYPICAL APPLICATION

OUTPUT

3.3V

INPUT

12V

R1

30K

R2

6.8K

ENABLE INPUT

2

SW

1 VIN

6

FB

EN

GND

BST

3

5

4

100nF

Cout

2*22uF

ETA1661

Cin

10uF

2.2uH

Cff 47pF

optional

Cin

100nF

ORDERING

INFORMATION

PART No.

PACKAGE

TOP MARK

Pcs/Reel

ETA1661FSG

FCSOT563

UDYW

5000

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ETA1661FSG Datasheet(PDF) 1 Page - ETA SOLUTIONS CO. LIMITED

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