3.3V DC to DC Single Output Power Supply
Referenzdesign von: Analog Devices
![3.3V DC to DC Single Output Power Supply](/_next/image?url=https%3A%2F%2Fdownload.datasheets.com%2Fpdfs%2F2011%2F4%2F28%2F1%2F55%2F12%2F469%2Fmax_%2Fmanual%2Fan2018_fig.1.jpg&w=1920&q=75)
Input Stage Shows How the Circuit Accomplishes Seamless Switching Between USB Port and the Adapter. As Voltage on the USB Supply Line Drops, the FET Connects the +5V Adapter to the Battery Charger. Under a Load of 250mA, this Connection Occurs When the USB Voltage Drops to +4.3V