anyCAP® 100 mA Low Dropout Linear Regulator ADP3309 Rev. C is a low dropout linear regulator with ±1.2% accuracy and a typical dropout voltage of 120 mV at 100 mA. The device requires only COUT = 0.47 μF for stability and can be used with all types of capacitors (including MLCC). It also features current and thermal limiting, low noise, low shutdown current, a temperature range of -20°C to +85°C, an input voltage range of 2.8 V to 12 V, and multiple fixed voltage options. It is available in a small 5-lead SOT-23 package.
The ADP3309 is a precision low‑dropout (LDO) linear regulator offering ±1.2 % accuracy, ultra‑low dropout voltage (120 mV typical at 100 mA) and operation over a 2.8 V‑12 V input range. It requires only a 0.47 µF output capacitor for stability and works with any capacitor type, including MLCCs.
Typical applications include cellular phones, notebook computers, battery‑powered systems, PCMCIA regulators, bar‑code scanners, and camcorders. The document provides functional block diagrams, pin descriptions, performance curves, thermal protection details, PCB layout recommendations, and example circuits for higher current or dual‑output configurations.
| Output Voltage Accuracy | ±1.2 % typical |
|---|---|
| Ground Current (typical) | 0.8 mA – 2.0 mA |
| Shutdown Threshold | On 2.0 V, Off 0.3 V |
| Shutdown Pin Input Current (0‑5 V) | 1 µA |
Only a 0.47 µF output capacitor is needed for stable operation.