LP3991TLX-1.3 Description
Operating from a minimum input voltage of 1.65 V, the LP3991 LDO has been designed to provide fixed stable output voltages for load currents up to 300 mA. This device is suitable where accurate low voltages are required from low input voltage sources and are therefore suitable for the post-regulation of switched-mode regulators. In such applications, significant improvements in performance and EMI can be realized, with little reduction in overall efficiency. The LP3991 provides fixed outputs as low as 1.2 V from a wide input range from 1.65 V to 4 V Using the enable (EN) pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn.
LP3991TLX-1.3 Features
Input Voltage From 1.65 V to 4 V
Output Voltage From 0.8 V to 3 V
1% Accuracy at Room Temperature
125-mV Dropout at 300-mA Load
50-μA Quiescent Current at 1-mA Load
Inrush Current Controlled to 600 mA
PSRR 65 dB at 1 kHz
100-μs Start-Up Time for 1.5-V VOUT
Stable With Ceramic Capacitors as Small as 0402
Thermal-Overload and Short-Circuit Protection
