Figure 6-2. Power Dissipation: Save Operating Area versus VCC Output Current and Supply
Voltage VS at Different Ambient Temperatures Due to Rthja = 80 K/W
60.00
50.00
40.00
30.00
20.00
Tamb = 85°C
Tamb = 95°C
Tamb = 105°C
10.00
0.00
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
VS (V)
To program the microcontroller it may be necessary to supply the VCC output via an external
power supply while the VS Pin of the system basis chip is disconnected. This issue does not
occur with the system basis chip.
12 ATA6623/ATA6625
4957H–AUTO–05/10