Use SP4521
SP4533 is a single chip solution designed for synchronous voltage boost for mobile phones, which integrates linear charge management module, synchronous discharge management module, power detection and LED indicator module, and protection module.
It can be replaced with FM9603BL ESOp-8 5V1A booster mobile power chip.
The booster chip is used in electronic products and is an essential electronic component. As the name suggests, the booster chip is mainly used to increase voltage.