ETA1089

www.etasolution.com

1

Powering Minds of the Smart

5V/2.5A Output, 1MHz Synchronous Step-Up Converter with DCP emulator

DESCRIPTION

FEATURES

ETA1089 is an ETA Solutions’ high efficiency, high frequency

synchronous Step-Up converter, capable of delivering output

current up to 2.5A at a 5V output from input as low as 3.3V.

With a low Rdson Power MOS and a built-in synchronous

rectifier, its efficiency can be as high as 93% at a 5V/2.1A load.

This greatly minimizes power dissipation and reduces heat on

the IC, making it ideal for applications that require small board

space and have stringent temperature constraints, such as

power banks and mobile devices. ETA1089 also integrates an

USB emulator that provides correct electrical signature on the

D+/D- for charging compliant devices. ETA1089 also

protects against overload and short-circuit conditions. All of

these features are integrated in a tiny DFN3x3-12 package.

With 1MHz switching frequency, small external input and output

capacitors and inductor can be used.



Up to 97% Energy Converting Efficiency



Up to 2.5A output current at 5V output, 3.3V input



Dedicated Charging Port (DCP) emulator



True Shut off during shutdown and output short-

circuit protection



Thermal Shutdown



DFN3x3-12

APPLICATIONS



Power Bank



Mobile 3G/4G WLAN



Mobile Bluetooth music player and speaker

ORDERING INFORMATION

PART ID

PACKAGE

TOP MARK

ETA1089D3M

DFN3X3-12

ETA1089

YWW2L

TYPICAL APPLICATION

SW

IN

22uF

10uF

OUT

2.2uH

PGND

AGND

EN

22uF

D+/D-

ETA1089

`

5V

VBUS

D-

D+

GND

USB Port

2.5A Output Synchronous Boost with USB DCP Emulator