The AP133 is a 300mA, adjustable output voltage, low dropout linear regulator with low dropout voltage and low quiescent current, it is suitable for battery powered devices.
The AP133 is a 300 mA, adjustable output, low‑dropout linear regulator designed for low‑power applications. It features a very low quiescent current of 40 µA, a wide input voltage range of 2 V–6 V, adjustable output of 1 V–5 V, low dropout of 350 mV at full load, and fast 25 µs start‑up time. Built‑in protections include current‑limit, short‑circuit and thermal shutdown.
Typical applications include cellular phones, Bluetooth headsets, MP3/MP4 players and other battery‑powered devices. The device is offered in SOT25 and DFN2020‑6 packages and complies with RoHS and lead‑free requirements.
| Input voltage range | 2 V – 6 V |
|---|---|
| Output voltage range (adjustable) | 1 V – 5 V |
| Quiescent current | 40 µA |
| Dropout voltage at 300 mA | 350 mV |
| Start‑up time | 25 µs |
| Power Supply Rejection Ratio (PSRR) | 65 dB at 1 kHz |
| Maximum power dissipation (SOT25) | 740 mW |
| Thermal shutdown threshold | 145 °C |
The AP133 draws about 40 µA of quiescent current from zero to maximum load.
It includes current‑limit protection, short‑circuit protection, and thermal shutdown protection.
The regulator starts up in approximately 25 µs.