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L9788 Datasheet(PDF) 63 Page - STMicroelectronics |
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L9788 Datasheet(HTML) 63 Page - STMicroelectronics |
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63 / 264 page  DS12308 Rev 4 63/264 L9788 Multi-voltage regulator supplies 263 Figure 22. Power supply block diagram with pre-boost regulator permanent VBAT The pre-boost regulator is an optional choice. It can be disabled (BOOST_EN (CONFIG- REG 1 D5) in case battery voltage is high enough in cranking phase to supply the pre-buck regulator. See the diagram in Figure 23 Figure 23. Power supply block diagram with charge pump without pre-boost GADG2911161230PS 5V Regulator Linear Internal Supply Boost VBsense VB_IN VBAT KEY WK_IN 6V 5V U-chip power structure Buck Track Regulator Vtrack 1/2/3 Boost_G WK VB_STBY BUCK_SW VPRE BUCK_C_BST C_BST Rg Rg_pd VB_IN_SW GADG2911161241PS VB_STBY Anti-Reverse VBAT CP VB_IN WK_IN KEY Charge Pump Supply Internal U-chip power structure Track Regulator Buck Linear 5V Regulator WK VB_IN_SW Vpre C_BST BUCK_C_BST 6V Vtrack 1/2/3 5V |
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