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Original question:
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:
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?
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?
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!
Thank you for your prompt response sir,
I have attached the block diagram for your reference. Could you please evaluate the feasibility of the proposed method? Your suggestions on this matter would be greatly appreciated.
