Performance of the LP3981 device is optimized for battery-powered systems to deliver
ultra-low-noise, extremely low dropout voltage, and low quiescent current. Regulator ground current
increases only slightly in dropout, further prolonging the battery life.
Power supply rejection is better than 60 dB at low frequencies. This high power supply
rejection is maintained down to lower input voltage levels common to battery-operated
The device is ideal for mobile phone and similar battery-powered wireless applications.
It provides up to 300 mA, from a 2.5-V to 6-V input, consuming less than 1 µA in disable mode.
The LP3981 is available in 8-pin VSSOP-8 and 6-pin WSON packages. Performance is
specified for −40°C to +125°C temperature range. The device available in the following output
voltages: 2.5 V, 2.7 V, 2.8 V, 2.83 V, 3 V, 3.03 V and 3.3 V as standard. Other output options can
be made available; contact your local TI sales office for more information.