LP3991

www.DataSheet4U.com LP3991 300mA Linear Voltage Regulator for Digital Applications January 2007 LP3991 300mA Linear Voltage Regulator for Digital Applications General Description Operating from a minimum input voltage of 1.65V, the LP3991 regulator has been designed to provide fixed stable output voltages for load currents up to 300mA. This device is suitable where accurate, low voltages are required from low input voltage sources and is therefore suitable for 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 will provide fixed outputs as low as 1.2V from a wide input range of 1.65V to 3.6V Using the enable pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn. The LP3991 is designed to be stable with space saving ceramic capacitors as small as 0402 case size. Performance is specified for a -40°C to 125°C junction temperature range. For output voltage options please contact your local NSC sales office. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Operation from 1.65V to 3.6V Input 1% accuracy at room temperature Output Voltage from 1.2V to 2.8V 125mV Dropout at 300mA load 50µA Quiescent Current at 1mA Load Inrush Current controlled to 600mA PSRR 65dB at 1kHz 100µs Start-Up time for 1.5V VOUT Stable with Ceramic Capacitors as small as 0402 Thermal-Overload and Short-Circuit Protection Package 4 pin m...