ETA1019

www.ETAsolution.com

Outperform with Efficiency

Proprietary Information DO NOT Distribute

1

Low Voltage Startup, 1MHz 500mA Synchronous Step-Up DC-DC

FEATURES



Low Vin Start-up Voltage down to 850mV Ideal for

Single Alkaline Cell operations



Capable of delivering 500mA output current at

Vin=3.0V, V out=3.3V



1MHz Switching Frequency allows small inductor and

output cap



Input boost-strapping allows using small or no input

cap



Low Noise PWM control



Internally Compensated Current Mode Control



Internal Synchronous Rectifier



Logic Control Shutdown (IQ<1uA)



Available in SOT23-5

APPLICATIONS

DESCRIPTION

The ETA1019 is a step-up converter that provides a boosted

output voltage from a low voltage source. Because of its

proprietary design, it starts up at a very low input voltage

down to 850mV, making it an ideal choice for single cell

alkaline/NiMH battery operations.

A switching frequency of 1MHz minimizes solution footprint

by allowing the use of tiny, low profile inductors and

ceramic capacitors. The current mode PWM design is

internally compensated, reducing external parts count.

ETA1019 is housed in a tiny SOT23-5 package.



Medical Instruments



Bluetooth Headsets



Flash-Based MP3 Players



Wireless Mice



One to Three Cell Battery Operated Devices

TYPICAL APPLICATION

OFF

ON

EN

G

FB

SW

OUT

ETA1019

0.47μF

4.7μH

2

3

4

1

5

4.7uF