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LP3995ILDX-2.8 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LP3995ILDX-2.8 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 14 page  LP3995 Micropower 150mA CMOS Voltage Regulator with Active Shutdown General Description The LP3995 linear regulator is designed to meet the require- ments of portable battery-powered applications and will pro- vide an accurate output voltage with low noise and low quiescent current. Ideally suited for powering RF/Analog devices, this device will also be used to meet more general circuit needs in which a fast turn-off is essential. For battery powered applications the low dropout and low ground current provided by the device allows the lifetime of the battery to be maximized. The Enable(/Disable) control allows the system to further extend the battery lifetime by reducing the power consumption to virtually zero. The Enable(/Disable) function on the device incorporates an active discharge circuit on the output for faster device shut- down. Where the fast turn-off is not required the LP3999 linear regulator is recommended. The LP3995 also features internal protection against short- circuit currents and over-temperature conditions. The LP3995 is designed to be stable with small 1.0 µF ceramic capacitors. The small outline of the LP3995 micro SMD package with the required ceramic capacitors can realize a system application within minimal board area. Performance is specified for a −40˚C to +125˚C temperature range. The device is available in micro SMD package and LLP package. For other package options contact your local NSC sales office. The device is available in fixed output voltages in the ranges 1.5V to 3.3V. For availability, please contact your local NSC sales office. Key Specifications n 2.5V to 6.0V Input Range n Accurate Output Voltage; ±75mV / 2% n 60 mV Typical Dropout with 150 mA Load n Virtually Zero Quiescent Current when Disabled n Low Output Voltage Noise n Stable witha1µF Output Capacitor n Guaranteed 150 mA Output Current n Fast Turn-on; 30 µs (Typ.) n Fast Turn-off; 175 µs (Typ.) Features n 5 pin micro SMD Package n 6 pin LLP Package n Stable with Ceramic Capacitor n Logic Controlled Enable n Fast Turn-on n Active Disable for Fast Turn-off. n Thermal-overload and Short-circuit Protection n −40 to +125˚C Junction Temperature Range for Operation Applications n GSM Portable Phones n CDMA Cellular Handsets n Wideband CDMA Cellular Handsets n Bluetooth Devices n Portable Information Appliances Typical Application Circuit 20034901 August 2004 © 2004 National Semiconductor Corporation DS200349 www.national.com |
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