The LP3879 is a 800 mA fixed-output voltage regulator designed to provide high performance and low noise in applications requiring output voltages between 1.0V and 1.2V.
The LP3879 micropower regulator provides 800 mA fixed‑output voltage with very low noise (18 pV RMS) and a ground‑pin current as low as 5.5 mA. It is offered in 8‑lead PSOP and LLP surface‑mount packages and supports input voltages from 2.5 V to 6 V.
Typical applications include ASIC power supplies, graphics cards, set‑top boxes, printers, DSP/FPGA supplies, SMPS post‑regulators and medical instrumentation. The device includes a shutdown pin that can reduce quiescent current to less than 10 pA when pulled low.
| Output Voltage (standard) | 1.00 V, 1.20 V |
|---|---|
| Maximum Output Current | 800 mA |
| Ground Pin Current (typical) | 5.5 mA @ 800 mA load |
| Shutdown Quiescent Current | <10 pA |
| Input Voltage Range | 2.5 V to 6 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Output Noise (typical) | 18 pV RMS (10 nF bypass) |
The LP3879 is available with fixed output voltages of 1.00 V or 1.20 V, with custom options in 50 mV steps between 1.0 V and 1.2 V.
When the shutdown pin is pulled low, the LP3879 draws less than 10 pA of quiescent current.
At an 800 mA load the ground‑pin current is typically 5.5 mA.