The LP3990 regulator is designed to meet the requirements of portable, battery-powered systems providing an accurate output voltage, low noise, and low quiescent current. The LP3990 will provide a 0.8V output from the low input voltage of 2V at up to 150mA load current. When switched into shut- down mode via a logic signal at the enable pin, the power consumption is reduced to virtually zero. The LP3990 is designed to be stable with space saving ceramic capacitors as small as 1.0µF. Performance is specified for a -40°C to 125°C junction temperature range. For output voltages other than 0.8V, 1.2, 1.35V, 1.5V, 1.8V, 2.5V, 2.8V, or 3.3V please contact your local NSC sales office.
The LP3990 linear regulator is intended for portable, battery‑powered systems that require an accurate output voltage, low noise, and very low quiescent current. It operates from an input voltage as low as 2 V and can deliver up to 150 mA. The device includes logic‑controlled enable, thermal‑overload and short‑circuit protection, and can be shut down to virtually zero power consumption.
The regulator is stable with 1 µF ceramic capacitors, supports multiple fixed output voltages (0.8 V to 3.3 V), and is available in 4‑pin micro SMD and 6‑pin LLP (SOT‑23) packages. It is rated for a -40 °C to 125 °C junction temperature range and includes recommended specifications for output capacitors.