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AN3399 Datasheet(PDF) 2 Page - STMicroelectronics |
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AN3399 Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 24 page ![]() Contents AN3399 2/24 Doc ID 018824 Rev 2 Contents 1 Voltage regulation circuit schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Regulation with external PNP without current limitation . . . . . . . . . . . . . . . 5 1.2 Regulation with external NPN without current limitation . . . . . . . . . . . . . . . 6 1.3 Voltage regulation and current limitation with external PNP . . . . . . . . . . . . 7 1.4 Voltage regulation and current limitation with external NPN . . . . . . . . . . . 8 2 Evaluations of circuit with PNP and current limitation . . . . . . . . . . . . . 9 2.1 Static characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1.1 Standby current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1.2 Line regulation 6-18 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.1.3 Load regulation up to 250 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 Dynamical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2.1 V3 switching ON / OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2.2 Load switch ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2.3 Influence of Ci and C1 on the V3 switch and load variation response . . 14 2.2.4 VS cranking measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Appendix A Reference document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 |
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