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PXD10 Datasheet(PDF) 74 Page - Freescale Semiconductor, Inc |
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PXD10 Datasheet(HTML) 74 Page - Freescale Semiconductor, Inc |
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74 / 130 page  Electrical characteristics PXD10 Microcontroller Data Sheet, Rev. 1 Freescale Semiconductor 74 Figure 7. Recommended order for powering down the power supplies CAUTION The VDD IO HV supply must be disabled after the VDDREG HV supply voltage drops below 1.5 V. This is to ensure that the 1.2 V regulator shuts down before the 3.3 V regulator shuts down. 3.7.5 Power-up inrush current profile Figure 8 shows the power up inrush current profile of the ballast transistor under the worst possible startup condition (fastest PVT and fastest power ramp time). Figure 8. Power-up inrush current profile VDDREG HV supply 2.7 V VDDREG HV POR (internal) 1.2 V regulator output Soft startup (approx. 200 s) VDD IO HV supply (3–5.5 V) > 1.5 V Time to discharge 40 F Capacitance depends on load 1.2 V supply Base control Current profile 3–5.5 V |
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