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AN2937 Datasheet(PDF) 18 Page - STMicroelectronics |
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AN2937 Datasheet(HTML) 18 Page - STMicroelectronics |
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18 / 41 page  Jumper settings AN2937 18/41 Doc ID 15418 Rev 1 9.4 Switching sections - frequency selection (TON) 9.5 Linear regulator LDO enable (EN_LDO) Table 6. Jumper S4 TON (connect TON pin to S4) Position SMPS OUT1 SMPS OUT2 GND 400 kHz 500 kHz VREF2 400 kHz 300 kHz VCC 200 kHz 300 kHz Table 7. Jumper S5 EN_LDO (connect EN_LDO pin to S5) Position Linear regulator LDO enable GND The LDO is disabled. VIN through resistor divider The LDO is enabled. EN_LDO is connected to VIN with a resistor divider. As soon as the input voltage overlaps 5.76 V typ. The LDO regulates the LDO output voltage. |
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