BUY DS2501 https://www.utsource.net/itm/p/112814.html
1A VERY LOW DROPOUT VOLTAGE REGULATORS
Description: The DS2501 is a 1-Wire 8-bit electrically programmable read-only memory (EPROM) device. It is a low-cost, low-power memory device that is ideal for applications requiring a small amount of nonvolatile memory. Features: 8-bit EPROM Memory 1-Wire Interface Low Power Consumption Low Cost Read/Write Protection High Reliability Low Voltage Operation High Speed Data Transfer Applications: Automotive Industrial Home Automation Security Systems Medical Devices Wearable Devices (For reference only)