The LP2954/LP2954A is a 5V micropower voltage regulator with very low quiescent current (90 µA typical at 1 mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250 mA load current). The quiescent current increases only slightly at dropout (120 µA typical), which prolongs battery life. The LP2954 with a fixed 5V output is available in the three- lead TO-220 and TO-263 packages. The adjustable LP2954 is provided in an 8-lead surface mount, small outline pack- age. The adjustable version also provides a resistor network which can be pin strapped to set the output to 5V. Reverse battery protection is provided. The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference. Output accuracy is guaranteed at both room temperature and over the entire operating temperature range.
The LP2954 series provides a 5 V micropower voltage regulator with ultra‑low quiescent current (90 pA typical at 1 mA load) and very low dropout voltage (typically 60 mV at light loads). The fixed‑output version is offered in TO‑220 and TO‑263 packages, while the adjustable version comes in an 8‑lead SO‑8 package and includes a resistor network for setting the output.
Key features include reverse‑battery protection, tight line and load regulation (0.04 % typical), low temperature coefficient, and built‑in current and thermal limiting. The device is suitable for high‑efficiency linear regulation and battery‑powered applications, with an operating temperature range of –40 °C to +125 °C.
| Quiescent current | 90 pA typical at 1 mA load |
|---|---|
| Dropout voltage (light load) | 60 mV typical |
| Dropout voltage (250 mA load) | 470 mV typical |
| Maximum output current | 250 mA guaranteed |
| Fixed output voltage | 5 V |
| Adjustable output voltage range | 1.23 V to 29 V |
| Operating temperature range | -40 °C to +125 °C |
| Temperature coefficient | 20 ppm/°C |
The LP2954 has a quiescent current of 90 pA typical at a 1 mA load.
The dropout voltage is typically 60 mV at light loads.
The fixed‑output version is available in TO‑220 and TO‑263 3‑lead plastic packages.
The device operates from –40 °C to +125 °C.