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AN3392 Datasheet(PDF) 2 Page - STMicroelectronics

Part # AN3392
Description  The SPV1020 is a monolithic DC-DC boost converter designed
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3392 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
AN3392
2/57
Doc ID 018749 Rev 1
Contents
1
Application overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
SPV1020 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4
Output voltage ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5
Application efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
SPV1020 functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1
Operating modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2
OFF-state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3
Burst mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4
Normal/MPPT mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7
Voltage regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.1
Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2
Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.3
Current balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.4
SPI serial peripheral interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.1
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10
External component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.1
Power and thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.2
Inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.3
Bootstrap capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10.4
Internal voltage rail capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10.5
Input voltage capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10.6
Input voltage partitioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31


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