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ST1S40 データシート(PDF) 3 Page - STMicroelectronics |
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ST1S40 データシート(HTML) 3 Page - STMicroelectronics |
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3 / 29 page  DocID17928 Rev 5 3/29 ST1S40 Pin settings 29 1 Pin settings 1.1 Pin connection 1.2 Pin description Figure 2. Pin connection (top view) 8 6 4 7 3 2 5 1 VINA EN FB GND PGND SW VINSW NC 8 45 1 VINA EN FB GND PGND SW VINSW AGND VFQFPN 8 6 4 7 3 2 5 1 VINA EN FB GND PGND SW VINSW NC HSOP8 SO8-BW 9 9 HSOP-8 Table 1. Pin description No. Type Description VFQFPN and HSOP-8 S08-BW 13 VINA Unregulated DC input voltage 24 EN Enable input. With EN higher than 1.2 V the device in ON and with EN lower than 0.4 V the device is OFF (ST1S40Ixx). 35 FB Feedback input. Connecting the output voltage directly to this pin the output voltage is regulated at 0.8 V. To have higher regulated voltages an external resistor divider is required from Vout to the FB pin. 4 6 AGND Ground 5 - NC It can be connected to ground 6 8 VINSW Power input voltage 7 1 SW Regulator output switching pin 8 2 PGND Power ground - 7 Ground 9 - ePad Exposed pad mandatory connected to ground |
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