This document is the ADP3331 datasheet, which introduces the features and characteristics of the product.
The ADP3331 is a precision low‑dropout (LDO) regulator from Analog Devices. It operates from 2.6 V to 12 V input and provides an adjustable output from 1.5 V to 11.75 V, delivering up to 200 mA with typical 140 mV dropout at full load. The device is stable with a single 0.47 µF output capacitor and is tolerant of any capacitor ESR, thanks to its patented anyCAP technology.
The datasheet includes detailed specifications, typical performance graphs, theory of operation, and design guidelines such as capacitor selection, noise reduction, thermal management, and PCB layout. It also describes protection features like current limiting, thermal shutdown, and an error‑flag output for pre‑emptive regulation loss detection.
| Input Supply Voltage Range | 2.6 V to 12 V |
|---|---|
| Adjustable Output Voltage Range | 1.5 V to 11.75 V |
| Maximum Output Current | 200 mA |
| Typical Dropout Voltage (200 mA) | 140 mV |
| Shutdown Current (typical) | 10 nA |
The typical dropout voltage is 140 mV when delivering 200 mA.
Only a 0.47 µF output capacitor is needed for stability; larger values can be used if higher current surges are expected.
The device can supply up to 200 mA continuously and is short‑circuit protected up to about 300 mA.
It includes current limiting, thermal overload protection, a shutdown pin, and an error‑flag output that warns before regulation loss.