The MIC5255 is a high-precision low-noise CMOS voltage regulator optimized for ultra-low-noise applications. It offers 1% initial accuracy, extremely-low dropout voltage (135mV at 150mA) and low ground current (typically 90µA). The MIC5255 provides a very-low-noise output, ideal for RF applications where a clean voltage source is required.
The MIC5255 is an efficient, precise CMOS voltage regulator optimized for ultra‑low‑noise applications. It operates from 2.7 V to 6.0 V input and delivers up to 150 mA with an ultra‑low dropout of 135 mV. The device includes a TTL‑logic‑compatible enable pin and a noise‑bypass pin for further noise reduction.
Key features include ultra‑low output noise (30 µV rms), low quiescent current (90 µA), thermal shutdown at 150 °C, and protection functions such as current limit and thermal shutdown. The regulator is supplied in 5‑pin SOT‑23‑5, thin‑SOT, and 6‑pin 2 × 2 mm MLF packages, and is intended for handheld, battery‑powered and RF applications.
| Input voltage range | 2.7 V to 6.0 V |
|---|---|
| Dropout voltage | 135 mV @ 150 mA |
| Output noise | 30 µV (rms) |
| Quiescent current | 90 µA |
| Output voltage accuracy | -1 % initial, -2 % over temperature |
| Thermal shutdown temperature | 150 °C |
Pulling the enable pin low disables the regulator and puts it into a zero off‑mode current state.