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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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STM32F412RGT7PTR Fiches technique(PDF) 85 Page - STMicroelectronics |
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STM32F412RGT7PTR Fiches technique(HTML) 85 Page - STMicroelectronics |
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85 / 201 page  DocID028087 Rev 7 85/201 STM32F412xE/G Electrical characteristics 166 6.3.2 VCAP_1/VCAP_2 external capacitors Stabilization for the main regulator is achieved by connecting the external capacitor CEXT to the VCAP_1 and VCAP_2 pins. For packages supporting only 1 VCAP pin, the 2 CEXT capacitors are replaced by a single capacitor. CEXT is specified in Table 18. Figure 23. External capacitor CEXT 1. Legend: ESR is the equivalent series resistance. 6.3.3 Operating conditions at power-up/power-down (regulator ON) Subject to general operating conditions for TA. Table 19. Operating conditions at power-up / power-down (regulator ON) Table 18. VCAP_1/VCAP_2 operating conditions(1) 1. When bypassing the voltage regulator, the two 2.2 µF VCAP capacitors are not required and should be replaced by two 100 nF decoupling capacitors. Symbol Parameter Conditions CEXT Capacitance of external capacitor with the pins VCAP_1 and VCAP_2 available 2.2 µF ESR ESR of external capacitor with the pins VCAP_1 and VCAP_2 available < 2 Ω CEXT Capacitance of external capacitor with a single VCAP pin available 4.7 µF ESR ESR of external capacitor with a single VCAP pin available < 1 Ω Symbol Parameter Min Max Unit tVDD VDD rise time rate 20 ∞ µs/V VDD fall time rate 20 ∞ |
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