Ver: 1.7

Jan 25, 2006

TEL: 886-3-5788833

http://www.gmt.com.tw

11

G916

Global Mixed-mode Technology Inc.

Layout Guide

An input capacitance of

≅ 1µF is required between the

G916 input pin and ground (the amount of the capaci-

tance may be increased without limit), This capacitor

must be located a distance of not more than 1cm from

the input and return to a clean analog ground.

Input capacitor can filter out the input voltage spike

caused by the surge current due to the inductive effect

of the package pin and the printed circuit board’s rout-

ing wire. Otherwise, the actual voltage at the IN pin

may exceed the absolute maximum rating.

The output capacitor also must be located a distance

of not more than 1cm from output to a clean analog

ground. Because it can filter out the output spike

caused by the surge current due to the inductive effect

of the package pin and the printed circuit board’s rout-

ing wire. Figure 5 is adjustable mode of G916 PCB

layout.

0

50

100

150

200

250

300

350

400

0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3

Still air

1oz copper on SOT-23-5 package

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

25

35

45

55

65

75

85

95

105

115

125

Still air

1oz copper on SOT-23-5 package

0

50

100

150

200

250

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2

Still Air

1oz copper on SOT-23-5 Package

Recommend Minimum Footprint

TSOT-23-5、SOT-23-5

Figure 5. Adjustable Mode

*Distance between pin & capacitor must no more than 1cm

[Power Dissipation Limit]

Maximum Power Dissipation of SOT-23-5

Figure 4. Power Dissipation vs. Ambient Temperature

[Power Dissipation Limit]