The LP3988 is a 150mA low dropout regulator designed specially to meet requirements of
Portable battery-applications. The LP3988 is designed to work with a space saving, small 1µF
ceramic capacitor. The LP3988 features an Error Flag output that indicates a faulty output
The LP3988's performance is optimized for battery powered systems to deliver 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 and starts to roll off at
10 kHz. High power supply rejection is maintained down to lower input voltage levels common to
battery operated circuits.
The device is ideal for mobile phone and similar battery powered wireless applications.
It provides up to 150 mA, from a 2.5V to 6V input, consuming less than 1 µA in disable mode and has
fast turn-on time less than 200µs.
The LP3988 is available 5 pin SOT-23 package and 5 bump thin DSBGA package. Performance
is specified for −40°C to +125°C temperature range and is available in 1.85, 2.5, 2.6, 2.85, 3.0
and 3.3V output voltages.