The ME4057ASPG-N is a Primary Side Regulation (PSR), which is a battery management solution manufactured by Micro One. This package includes a PMIC (Power Management Integrated Circuit) in an ESOP8 RoHS package (Greenpeak). The ME4057ASPG-N features High-Voltage Start-up, Temperature Compensation, Low Startup Current, Advanced Protection, and CPM Synchronous Rectification Technology to provide higher efficiency and smaller size. It is primarily used in battery charging applications. The PMIC features a hardware circuit protection and on/off control, reducing the external component count. The device supports up to 0.5A, with over-voltage/under-voltage protection, reverse current protection, short-circuit protection, over-temperature protection, and over-charge/discharge protection. The ME4057ASPG-N supports NiCd, NiMH, and Lithium battery types. The device is also compliant with RoHS directives, making it suitable for industrial and automotive applications.