
Layout Guide
An input capacitance of
1μF is required between the
G913 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.
Ver 0.9 Preliminary
Jan 25, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
9
G913
Global Mixed-mode Technology Inc.
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
routing 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
routing wire. Figure 6 is adjustable mode of G913 PCB
layout. Figure 7 is a PCB layout of G913 fixed mode.
Figure 4 Safe Operating Area
Safe Operating Area of G913 [Power Dissipation Limit]
200
0
50
100
150
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Input-Output Voltage Differential V
IN
-V
OUT
(V)
Note : V
IN(max)
<=5.5V
Figure 4 Safe Operating Area
O
TA=25
℃
TA=55
℃
TA=85
℃
Maximum Recommended Output Current
T
A
=25°C,Still Air
1oz Copper on SOT-23-5 Package
Mounted on recommended mimimum footprint (R
θ
JA=240
°
C/W)
Maximum Power Dissipation of SOT-23-5
0
0.2
0.3
0.4
0.5
0.6
0.7
25
35
45
55
65
75
85
95
105
115
125
Amibent Temperature T
A
(
°
C)
Still Air
1oz Copper on SOT-23-5 Package
Mounted on recommend mimimum footprint (R
θ
JA=240°C/W
)
Figure 5 Power Dissipation vs. Temperature
*Distance between pin & capacitor must no more than 1cm
*Distance between pin & capacitor must no more than 1cm
Figure 3. Recommended Minimum Footprint