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CY8CKIT-059 数据表(PDF) 31 Page - Infineon Technologies AG |
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CY8CKIT-059 数据表(HTML) 31 Page - Infineon Technologies AG |
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31 / 140 page  Document Number: 001-84932 Rev. *N Page 30 of 139 PSoC® 5LP: CY8C58LP Family Datasheet Figure 6-6. Application of Boost Converter powering PSoC device The boost converter may also generate a supply that is not used directly by the PSoC device. An example of this use case is boosting a 1.8 V supply to 4.0 V to drive a white LED. If the boost converter is not supplying the PSoC devices VDDA, VDDD, and VDDIO it must comply with the same design rules as supplying the PSoC device, but with a change to the bulk capacitor requirements. A parallel arrangement 22 µF, 1.0 µF, and 0.1 µF capacitors are all required on the Vout supply and must be placed within 1 cm of the VBOOST pin to ensure regulator stability. Figure 6-7. Application of Boost Converter not powering PSoC device VBOOST VBAT VSSB IND VDDD VDDA VDDIO0 VSSA VSSD Boost Logic VDDIO1 VDDIO2 VDDIO3 0.1 µF 0.1 µF 0.1 µF 0.1 µF 22 µF 0.1 µF 0.1 µF 1.0 µF 1.0 µF 22 µF 4.7 µH 10 µH 22 µH Schottky, 1A VDDD 0.1 µF 1.0 µF All components and values are required 0.5–3.6 V PSoC External Load VBOOST VBAT VSSB IND VDDD VDDA VDDIO0 VSSA VSSD Boost Logic VDDIO1 VDDIO2 VDDIO3 22 µF 4.7 µH 10 µH 22 µH Schottky, 1A VDDD All components and values are required 0.5–3.6 V 22 µF 0.1 µF 1.0 µF VDDA, VDDD, and VDDIO connections per section 6.2 Power System. VOUT PSoC External Load |
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