LP2981 Micropower 100 mA Ultra Low-Dropout Regulator
The LP2981 Micropower 100 mA Ultra Low‑Dropout Regulator is designed for battery‑powered applications. It offers a very low dropout voltage, precise output, and minimal quiescent current, making it suitable for cellular phones, PDAs, camcorders and other portable devices.
Key features include a typical 200 mV dropout at 100 mA load, ground‑pin current of 600 µA at full load, sleep‑mode current below 1 µA, and eleven fixed output‑voltage options from 2.5 V to 5.0 V. The device operates from 2.1 V to 16 V supply, tolerates −40 °C to +125 °C junction temperature, and provides a guaranteed 100 mA output current.
| Dropout Voltage (typical) | 200 mV @ 100 mA load |
|---|---|
| Ground Pin Current (typical) | 600 µA @ 100 mA load |
| Sleep‑mode Quiescent Current | < 1 µA |
| Output Voltage Tolerance | ±0.75 % |
| Input Supply Voltage (operating) | 2.1 V to 16 V |
| Operating Junction Temperature Range | −40 °C to +125 °C |
| Maximum Output Current | 100 mA (guaranteed) |
| Available Output Voltages | 2.5 V – 5.0 V (eleven options) |
The typical dropout voltage is 200 mV at a 100 mA load.
In sleep mode the device draws less than 1 µA when the ON/OFF pin is pulled low.
Eleven fixed output‑voltage options ranging from 2.5 V to 5.0 V are offered.
The regulator guarantees a continuous output current of 100 mA.