Tool/software:
I’m working on a project that involves powering up 13 different LDOs in a specific sequence. I plan to use the LM3880 for power sequencing, but I have a few questions:
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Output Flags: I understand the LM3880 has three flag outputs (Flag1, Flag2, Flag3). Given my requirement to enable 13 LDOs in sequence, how can I effectively utilize these flags? Is it possible to cascade multiple LM3880s to achieve more flags, or is there a better approach?
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Driving Multiple Enable Pins: I need to provide the same enable signal to 9 of the LDOs. Can the output flags from the LM3880 be buffered to achieve this? If so, what would be the recommended buffer IC for driving multiple LDO enable pins simultaneously?
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Recommendations for Flag Sequencing: Given my power-up sequence (1.8V → 2.5V → 1.2V → 3.3V → all others), what is the best way to configure the LM3880 and any additional components to ensure proper sequencing and enable signaling?
Any insights or recommendations would be greatly appreciated!