ETA1494

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Outperform with Efficiency

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1

Wide Input, 2A, 500KHz Synchronous Step-Down Converter in SOT23-8

DESCRIPTION

The ETA1494 is a wide input range, synchronous,

high-efficiency, DC-to-DC step-down switching regulator,

capable of delivering up to 2A of output current. With a

fixed switching frequency of 500KHz, this current mode

PWM controlled converter allows the use of small external

components, such as ceramic input and output caps, as

well as small inductors.ETA1494 also employs a proprietary

control scheme that switches the device into a power save

mode during light load, thereby extending the range of high

efficiency operation. What is unique about ETA1494 is that it

is packaged in a tiny space saving SOT23-8 package

ORDERING INFORMATION

PART #

PACKAGE PIN

TOP MARK

ETA1494S2I-T

SOT23-8

TBDYW

Date Code

Product Number

FEATURES



Wide Input Operating Range from 4V to 18V



High Efficiency at 12V In 5V Out: Up to 91%:



High Efficiency PFM mode at light load



Capable of Delivering 2A



No External Schottky and Compensation Needed



Current Mode control



Logic Control Shutdown



Thermal shutdown and UVLO



Available in SOT23-8 Package

APPLICATIONS



Set Top Boxes



Flat Panel TVs and Monitors



Networking equipment



Notebooks and Tablets

TYPICAL APPLICATION

ETA1494

GND

FB

IN

SW

3.3V/2A

4.7μH

49.9K

16.2K

EN

25V

10μF

6.3V

22μF

2

6

3

8

4

BST

10nF

5

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.01

0.1

1

VIN=6V

VIN=12V

VIN=16V