| Pin Number | Name | Function Description | |------------|-------------|-----------------------------------------------------------| | 1 | | Bootstrap. Connects a capacitor to the switch node (LX). | | 2 | GND | Ground. | | 3 | FB | Feedback. Monitors output voltage via a resistor divider.| | 4 | EN | Enable. High = ON (often connected to VIN via a resistor).| | 5 | IN | Input voltage (typically 4.5V to 24V). | | 6 | LX (SW) | Switching node. Connects to the inductor. |

In the world of electronics repair, reverse engineering, and DIY hardware modification, few things are as frustrating as hunting for a datasheet. You have a mysterious chip on a board—labeled "ME745"—and you cannot proceed without knowing which pin does what. Paywalls, broken links, and blurry forum images often block the way.

Disclaimer: Pinouts are based on community reverse engineering. Always verify with your specific board and component markings.

Remember: always double-check ground, measure resistance between pins before applying power, and cross-reference with equivalent ICs like the RT8059. With this guide, you no longer need to pay for a PDF or guess blindly.