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Showing results for tags 'LDO'.
Can we power the MSP430F5510 from USB without needing an external LDO regulator to provide 3.3v on the Vcc? Here is what I see: 1. If I plug the MSP430F5510 to a USB port, and without any power is applied to the MSP430 VCC pins, I see the pin VUSB provides a 3.3v. This is said as LDO output on the datasheet. 2. If I have 3.3v from an external power source to power the MSP430 then the chip would come alive and enumeration happens. So naturally I think I should be able to connect the VUSB to the VCC pin and should have the MSP430 powered by this VUSB power. 3. But when I do this,