It is a linear power management chip, whose core function is to convert unstable DC voltage into stable, clean, and low-noise output voltage.

Function:
1. Simple circuit with few peripheral components
2. Extremely small output ripple and low noise
3. Fast transient response
4. Low cost and small size
5.  ❌  Relatively low efficiency, significant heating occurs when the pressure difference is large
6.  ❌  Can only reduce voltage, cannot increase voltage

Typical Applications:
1. MCU, FPGA core, IO power supply
2. RF module RF, WiFi, Bluetooth
3. Audio amplifier, operational amplifier, analog circuit
4. Sensor, ADC/DAC reference power supply
5. Portable devices such as mobile phones, watches, TWS earphones, etc
6. Automotive electronics: small signal power supply for instruments, cameras, and car infotainment systems