The LP2985 is a 150 mA, fixed-output voltage regulator designed to provide ultra low dropout and low noise in battery powered applications.
The LP2985 is a 150 mA fixed‑output voltage regulator designed for ultra low‑dropout and low noise in battery‑powered applications. It features a typical dropout of 300 mV at full load, ground pin current as low as 850 pA, and a sleep‑mode quiescent current below 1 pA when the ON/OFF pin is pulled low. The device is stable with output capacitor ESR as low as 5 mΩ, allowing the use of ceramic capacitors, and provides 1 % output voltage accuracy (A‑grade).
The regulator is offered in SOT‑23 and micro SMD packages, minimizing board space. Multiple output voltage options from 2.5 V to 5.0 V are available, and the part includes over‑temperature and over‑current protection. Typical applications include cellular phones, palmtop/laptop computers, PDAs, camcorders, and other portable electronics. Ordering information and package markings are detailed in the datasheet.
| Dropout Voltage | Typically 300 mV @ 150 mA load, 7 mV @ 1 mA load |
|---|---|
| Ground Pin Current | Typically 850 pA @ 150 mA load, 75 yA @ 1 mA load |
| Sleep‑Mode Quiescent Current | < 1 pA when ON/OFF pin is pulled low |
| Output Noise | 30 pV (typical) with 10 nF bypass capacitor |
| Output Voltage Accuracy | 1 % tolerance (A‑grade) |
| Supply Voltage Range | Up to 16 V |
| Operating Junction Temperature | -40 °C to +125 °C |
| Package Types | SOT‑23 and micro SMD packages |
The typical dropout voltage is 300 mV at a 150 mA load.
It draws typically 850 pA of ground pin current at a 150 mA load.
The sleep‑mode quiescent current is less than 1 pA when the ON/OFF pin is pulled low.
The device offers 1 % tolerance output voltage (A‑grade).