The PN8015 is a chip that integrates multiple functional modules, including DC-DC converter, low-voltage differential linear regulator, power management controller, etc. The pin functions of the chip are as follows:
1. VIN: Power input pin of the chip, connected to the positive terminal of the external power supply.
2. GND: The power grounding pin of the chip is connected to the negative terminal of the external power supply.
3. VDD: Power supply pin inside the chip, connected to the internal DC-DC converter and low-voltage differential linear regulator.
4. LDO_IN: The low-voltage differential linear regulator input pin of the chip is connected to the external power supply that needs to be stabilized.
5. LDO_OUT: The low-voltage differential linear regulator output pin of the chip is connected to the load that needs to be stabilized.
6. SW: The DC-DC converter switch pin of the chip is used to control the switch of the internal DC-DC converter.
7. EN: The enable pin of the chip, used to control the switch of the internal power management controller.
8. FB: Feedback pin for feedback control of internal control loop.
9. VSEL: Power selection pin used to select the output voltage of the internal DC-DC converter.
10. VDET: Power supply voltage detection pin, used to detect the voltage of the external power supply.
It should be noted that the PN8015 chip pin function may vary slightly due to different packages and versions, the above is only a general introduction to the pin function, the specific should be subject to the chip specification.