Add a 0.1µF capacitor between the EN pin and GND, plus a 10kΩ resistor from EN to VIN. This creates an RC delay, preventing input inrush current.

Read the top marking. If it says "4015" → it is an XL4015. If "2596" → LM2596. If "5430" → TPS5430.

Assuming the common case of a (YP-05 as a PCB assembly), here’s what to look for on the schematic:

Yp-05 Schematic - [verified]

Add a 0.1µF capacitor between the EN pin and GND, plus a 10kΩ resistor from EN to VIN. This creates an RC delay, preventing input inrush current.

Read the top marking. If it says "4015" → it is an XL4015. If "2596" → LM2596. If "5430" → TPS5430. Yp-05 Schematic

Assuming the common case of a (YP-05 as a PCB assembly), here’s what to look for on the schematic: Add a 0