On Tuesday, January 31, 2023 at 1:08:04 PM UTC-4, mkr5000 wrote:
> Seems to me it would be a credible part these days with momentary switches being so popular? Something in a small case with Vcc in and out, ground and switch input. Crazy price on that Maxim part.
Most designs don't need a power supply switch chip. They have an MCU which can implement the same thing, or more accurately, don't ever turn off, because their power is so slow when idle. The CPU senses that the button is pushed, and either puts itself into its lowest power state or actually turns off a pass transistor on the power rail. When the user pushes the button again, it either triggers a "wakeup" input on the MCU, or enables the pass transistor directly.
Not many circuits can't handle a couple of uA drain when "off".
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