The LM2941 positive voltage regulator is capable of sourcing 1A of output current with a typical dropout voltage of 0.5V and a maximum of 1V over the entire temperature range. It includes a quiescent current reduction circuit that reduces the ground pin current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is only 30mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN - VOUT ≤ 3V). The LM2941 and all regulated circuitry are protected from reverse battery installations or two-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. Familiar regulator features such as short circuit and thermal overload protection are also provided.
The LM2941/LM2941C is a 1 A low‑dropout adjustable positive voltage regulator with features such as short‑circuit protection, reverse‑battery protection, and a quiescent‑current reduction circuit. It is designed for automotive and other demanding applications and offers an output voltage range of 5 V to 20 V.
The document provides electrical characteristics, typical performance curves, thermal data for various packages, and application notes. It also defines key terms such as dropout voltage, line regulation, and ripple rejection, and lists ordering information for the TO‑220, TO‑263, and LLP packages.
| Output voltage range | 5 V to 20 V |
|---|---|
| Maximum output current | greater than 1 A |
| Quiescent current (1 A load, 5 V diff) | ≈30 mA |
| Reverse battery protection | Included |
| Internal short‑circuit current limit | Included |
| Thermal resistance (TO‑220) | 3 °C/W |
The regulator can be adjusted to provide an output voltage between 5 V and 20 V.
It draws about 30 mA of quiescent current under those conditions.
Yes, the device includes reverse battery protection.