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AST1S31HF Datasheet(PDF) 25 Page - STMicroelectronics

Part # AST1S31HF
Description  Internal soft-start and enable
PDF  33 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AST1S31HF Datasheet(HTML) 25 Page - STMicroelectronics

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DocID026968 Rev 2
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AST1S31HF
Demonstration board
33
8
Demonstration board
Figure 11. Demonstration board schematic
AST1S31HF
U1
FB
3
AGND
4
VIN_SW
6
VIN_A
1
EN
2
SW
7
PGND
8
PGOOD
5
VIN
C3
1uF
C1
47uF
L1
0.91uH
R3
10K
R1
100K
R2
200K
C2
22uF
VOUT
Table 9. Component list
Reference
Part number
Description
Manufacturer
U1
AST1S31HF
STM
L1
DRA73 1R0 R
0.91 µH, Isat = 8.22 A
Coiltronics
C1
GCM32ER70J476ME16
47 µF 6.3 V X7R
MURATA
C2
GCM32ER71A226KE12
22 µF 10 V X7R
MURATA
C3
1 µF 25 V X7R
C4
NC
R1
100 k
1%
R2
200 k
 1%
R3
10 k
 1%



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