The ADP2140 is a 3 MHz, 600mA low quiescent current buck with a 300mA LDO regulator from Analog Devices. It features low quiescent current, low dropout voltage, and high PSRR, and is suitable for applications such as mobile phones, personal media players, digital cameras, and audio devices.
The ADP2140 is a high‑efficiency, low‑quiescent buck regulator that delivers up to 600 mA, combined with a 300 mA low‑dropout linear regulator in a compact 10‑lead LFCSP package. It operates from 2.3 V to 5.5 V input and includes features such as power‑good indication, soft‑start, and multiple protection circuits.
Typical applications include mobile phones, portable media players, digital cameras and other battery‑powered equipment. The device offers a variable‑frequency power‑saving mode, low shutdown current, and can be implemented with only a few external components, making it suitable for space‑constrained designs.
| Input voltage range | 2.3 V to 5.5 V |
|---|---|
| Buck output current | 600 mA |
| LDO output current | 300 mA |
| LDO quiescent current | 22 µA (zero load) |
| Shutdown current | <0.3 µA |
The buck regulator operates from 2.3 V to 5.5 V input.
The buck section can deliver up to 600 mA of output current.
It is supplied in a 10‑lead 0.75 mm × 3 mm × 3 mm LFCSP package.