The LM2931 series are very low drop regulators. The very low drop voltage and the low quiescent current make them particular suitable for low noise, low power applications and in battery powered systems.
The LM2931 series are very low‑dropout linear regulators offering a typical dropout of 0.15 V at 10 mA load and low quiescent current (2.5 mA typical at 100 mA load). They provide up to 100 mA output current and include an inhibit (shutdown) input for power‑saving standby operation, making them suitable for battery‑powered and automotive applications.
The devices are offered in multiple fixed‑output versions (3.3 V, 5 V) and an adjustable version, and are available in TO‑92, DPAK, TO‑220 and SO‑8 packages. Detailed absolute‑maximum ratings, thermal data, ordering codes, and electrical characteristics are listed in the tables throughout the document.
| Typical dropout voltage (10 mA load) | 0.15 V |
|---|---|
| Typical quiescent current (100 mA load) | 2.5 mA |
| Maximum output current | 100 mA |
| Operating temperature range | -40 °C to 125 °C |
| Available packages | TO‑92, DPAK, TO‑220, SO‑8 |
| Maximum input voltage (absolute max) | 40 V |
| Reverse input voltage (absolute max) | -15 V |
| Load dump protection voltage | 60 V |
The typical dropout voltage is 0.15 V at a 10 mA load.
The LM2931 is available in TO‑92, DPAK, TO‑220, and SO‑8 packages.
The quiescent current is typically 2.5 mA at 100 mA output.
The absolute maximum positive input voltage is 40 V, with a typical limit of 26 V.