ETA3452

www.etasolution.com

3

Powering Minds of the Smart

PIN DESCRIPTION

PIN #

NAME

DESCRIPTION

1

VIN

Supply Voltage. Bypass with a 22μF ceramic capacitor to GND

2

GND

Ground

3

VOS

Output voltage sense pin, to be connected to the output node of regulator.

4

FB

Feedback Input. Connect an external resistor divider from the output to FB and GND to set the output

to a voltage between 0.45V and VIN

5

SW

Inductor Connection. Connect an 1uH inductor Between SW and the regulator output.

6

EN

Enable pin for the IC. Drive this pin to high to enable the part, low to disable.

TYPICAL CHARACTERISTICS

(Typical values are at TA = 25oC unless otherwise specified.)

40%

50%

60%

70%

80%

90%

100%

0.001

0.01

0.1

1

10

Iout (A)

Efficiency Vs. Iout,Vout=3.3V

Vin=4.2V

Vin=5V

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

0

0.5

1

1.5

2

2.5

3

Iout (A)

Output Voltage Vs. Iout,Vout=3.3V

Vin=4.2V

Vin=5V

40%

50%

60%

70%

80%

90%

100%

0.001

0.01

0.1

1

10

Iout (A)

Efficiency Vs. Iout,Vout=1.2V

Vin=2.5V

Vin=3V

Vin=3.6V

Vin=4.2V

Vin=5V

1.04

1.06

1.08

1.1

1.12

1.14

1.16

1.18

1.2

1.22

1.24

0

0.5

1

1.5

2

2.5

3

Iout (A)

Output Voltage Vs. Iout,Vout=1.2V

Vin=2.5V

Vin=3V

Vin=3.6V

Vin=4.2V

Vin=5V