Global Mixed-mode Technology Inc.
G913
Layout Guide
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.
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.
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.
Figure 3. Recommended Minimum Footprint
Safe Operating Area of G913 [Power Dissipation Limit]
Maximum Power Dissipation of SOT-23-5
200
0.7
Still Air
0.6
Maximum Recommended Output Current
1oz Copper on SOT-23-5 Package
Mounted on recommend mimimum footprint (RθJA=240°C/W)
150
0.5
TA=25℃
TA=55℃
TA=85℃
0.4
0.3
0.2
100
TA=25°C,Still Air
50 1oz Copper on SOT-23-5 Package
Mounted on recommended mimimum footprint (RθJA=240°C/W)
Figure 4 Safe Operating Area
0.1
0
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
25
35
45
55
65
75
85
95
105 115 125
Input-Output Voltage Differential VIN-VOUT (V)
Note : VIN(max) <=5.5V
Amibent Temperature TA (°C)
Figure 4 Safe Operating Area
Figure 5 Power Dissipation vs. Temperature
Figure 6. Adjustable Mode
Figure 7. Fixed Mode
*Distance between pin & capacitor must no more than 1cm
*Distance between pin & capacitor must no more than 1cm
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver 0.9 Preliminary
Jan 25, 2002
9
CRANE [ Crane Aerospace & Electronics. ]
