ETA9742

www.etasolution.com

4

Powering Minds of the Smart

In BOOST MODE

APPLICATION SUPPORT

Please contact local distributor or ETA sales representatives for technical support.

PCB GUIDELINES

0

0.5

1

1.5

2

2.5

0

1

2

3

4

5

6

Iout (A)

Vout Vs. Iout

Vin=3.3V

Vin=3.6V

Vin=4.0V

Vin=4.35V

0

0.5

1

1.5

2

2.5

70%

75%

80%

85%

90%

95%

100%

Iout (A)

Efficiency Vs. Iout

Vin=3.3V

Vin=3.6V

Vin=4.0V

Vin=4.35V

Cin,

Input capacitor,

Next to inductor

and Cout

L,

Inductor

Next to IC pins

USB

V+

PGND

USB V+

PCB wire

PCB solder

Device

Cout,

Output capacitors

Next to IC pins

BAT

PCB Via

PCB bottom wire

Cbat,

Next to IC pins

Connect to AGND

Cusb,

Next to IC pins,

Connect to AGND

Please have CIN, COUT, and L placed just next to the IC pins so that the power traces are kept to the shortest to achieve

a good performance of ETA9742 and good EMI.

Have CBAT and CUSB placed close to the IC pins and connected to AGND to ensure a clean AGND.

深圳市展嵘电子　电话：０７５５－２３５０３８２２　　１３６８２４８９８７９　　１５９１４００２７０６　　１５０１８５４７５５９　１３７２５５８４３７７　１５８１４０４５０１８　１３５７０８３６８５６

QQ:3065595854 2657844277 2515156676 1303729348 1494165259 3382244500