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L5957PD 数据表(PDF) 11 Page - STMicroelectronics |
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L5957PD 数据表(HTML) 11 Page - STMicroelectronics |
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11 / 16 page ![]() L5957 Electrical specifications Doc ID 14442 Rev 3 11/16 Figure 6. Backup and reset diagram Figure 7. Hold and thermal protection 4.7 4.8 5 5 3 14 RESET CDELAY D02AU1422 5V PERM VBATT BACKUP CAP. t t t 9.5 18 22 VIN1 5V 5V ENREG3 8.5V HOLD TEMPERATURE PROTECTION 5V 5 REG2(5V) REG1(8.5V) 3.3V REG4(3.3V) REG3(5V) ENREG1-4 DUMP 9V 8.5V 5V ON T ≅160 D02AU1423B 3.3V |
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