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AN2620 Datasheet(PDF) 3 Page - STMicroelectronics

Part # AN2620
Description  3 A high-frequency synchronous 900 kHz
PDF  20 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2620 Datasheet(HTML) 3 Page - STMicroelectronics

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AN2620
List of figures
Doc ID 13883 Rev 3
3/20
List of figures
Figure 1.
Simplified schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
ST1S10 demonstration board typical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3.
Demonstration board layout ST1S10 MLP package - top side . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4.
Demonstration board layout ST1S10 MLP package - bottom side . . . . . . . . . . . . . . . . . . . 10
Figure 5.
Demonstration board layout ST1S10 SO-8 ePad - top side . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6.
Demonstration board layout ST1S10 SO-8 ePad package - bottom side. . . . . . . . . . . . . . 11
Figure 7.
Enable jumper selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 8.
External synchronization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 9.
ST1S10 application schematic for heavy capacitive load . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10.
ST1S10 application schematic for low output voltage (Vout < 2.5 V) and
2.5 V < Vin < 8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11.
ST1S10 application schematic for low output voltage (Vout < 2.5 V) and
8 V < Vin < 16 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12.
PCB layout suggestion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13.
PCB layout Vin_A and Vin_SW detail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 14.
PCB layout details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17



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