Guru
Joined: 05/10/2019
Location: United KingdomPosts: 8830
| Posted: 04:13pm 23 Jun 2025 |
No. It means that you have a safety device to help limit maximum dissipation of the chip. If you drive a pin into current limit the dissipated power has to go somewhere - heat. You shouldn't ever rely on it for anything else.
Also, the "noisy reg" can be a necessity. It's better to design the rest of your system so that it can be used. It dissipates far less heat than a linear. It will let you run a Pico from a 3V7 lithium cell with no issues (the cell protection will cut in before the Pico stops working). That's not possible even using a LDO reg.
3V3 wanted. Dropout voltage 200mV at best. Vfwd of a Schottky diode to isolate from VBUS is about 300mV at best so you need 3.3+0.2+0.3 = 3V8 absolute minimum from the battery.
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Edited 2025-06-24 02:22 by Mixtel90