Datasheet for the Sipex SPX5205 low‑noise, low‑dropout 150 mA LDO regulator with battery‑protection and multiple fixed outputs.
The SPX5205 is a low‑noise, low‑dropout linear regulator designed for battery‑powered devices such as cellular phones, portable computers and handheld instruments. It offers a wide range of fixed output voltages, very low quiescent current, and built‑in reverse‑battery, thermal and current limiting protection.
The document provides absolute maximum ratings, electrical characteristics, typical application circuits, package dimensions, and ordering information for the 5‑pin SOT‑23 version of the device.
| Fixed Output Voltages | 1.8 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V, 4.0 V, 4.5 V, 5.0 V |
|---|---|
| Dropout Voltage (150 mA) | 210 mV |
| Output Voltage Tolerance | < 1 % |
| Package | 5‑pin SOT‑23 |
The dropout voltage is 210 mV when the device is delivering 150 mA.
It provides reverse‑battery protection, thermal shutdown, and current limiting, plus zero off‑mode current.
A high‑quality 2.2 µF aluminum electrolytic capacitor is recommended for general applications.
The EN pin must be pulled high above 2.0 V to enable the regulator and below 0.6 V to disable it.