Extending the current & voltage capability on the ST7265 VDDF supply
This application note provides solutions for extending the current and voltage capabilities of the VDDF pin on the ST7265 microcontroller. It addresses scenarios where the embedded programmable regulator cannot meet specific application needs, such as driving Microdrive storage media.
| Output Voltage | 3.3V |
|---|---|
| Output Current | 500mA |
| Low Power Mode Consumption | 50uA |
The VDDF pin serves as a selectable 2.4 to 3.6V power supply to external devices and to supply some of the ST7265 I/Os.
A cost-effective solution involves using a voltage follower referenced on the VDDF output from the internal regulator.