LP3981 Overview
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.
LP3981 Key Features
- 1 2.5-V to 6-V Input Range
- 300-mA Output Current
- 60-dB PSRR at 1 kHz
- Fast Turnon Time: 120 μs (typical) with CBYPASS =
- 132-mV Typical Dropout with 300-mA Load
- 35-μVrms Output Noise Over 10 Hz to 100 kHz
- Logic Controlled Enable
- Stable With Ceramic and High-Quality Tantalum
- Thermal Shutdown and Short-Circuit Current Limit
