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SPSB100 bảng dữ liệu(PDF) 11 Page - STMicroelectronics

tên linh kiện SPSB100
Giải thích chi tiết về linh kiện  Automotive power management IC for highly integrated processors
PDF  213 Pages
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SPSB100 bảng dữ liệu(HTML) 11 Page - STMicroelectronics

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BUCK2 (5.0 V): charged with 1 A (DC activation) at 2.4 MHz
•
BUCK3 (0.98 V): charged with 2 A (DC activation) at 2.4 MHz
Note:
1. BUCK3 load current is already considered in the power dissipation calculation, so 1 A is referred to BUCK1
external loads current.
2. Selecting the switching frequency at 2.4 MHz for BUCK1 and BUCK2 will lower the regulators efficiency and
this extra power to be dissipated can generate a faster thermal shut-down. In case the application requires a
high DC current load, it is strongly suggested using the switching frequency at 400 kHz for BUCK1 and
BUCK2.
The following curves show the relationship between max power dissipation vs ambient temperature:
Figure 4. Max power dissipation vs ambient temperature for case "A" and case "B"
0.000
0.500
1.000
1.500
2.000
2.500
3.000
3.500
4.000
4.500
5.000
-50
-25
0
25
50
75
100
125
150
175
200
Tamb. [°C]
Pwr_A [W]
Pwr_B [W]
SPSB100
Maximum ratings
DS14640 - Rev 2
page 11/213



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