LP3988 Datasheet | National Semiconductor

Description The LP3988 is a 150m A low dropout regulator designed specially to meet requirements of Portable batteryapplications. 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 condition. 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 d B at low frequencies and starts to roll off at 10 k Hz. High power supply rejection is maintained down to lower input voltage levels mon to battery operated circuits. The device is ideal for mobile phone and similar battery powered wireless applications. It provides up to 150 m A, 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 micro SMD 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. n n n n n n 40d B PSRR at 10k Hz ≤1 µA quiescent current when shut down Fast Turn-On time: 100 µs (typ.) 80 m V typ dropout with 150m A load - 40 to +125˚C junction temperature range for operation 1.85V, 2.5V, 2.6V, 2.85V, 3.0V, and 3.3V Features n n n n n n n 5 bump thin micro SMD package SOT-23-5 package Power-good flag output Logic controlled enable Stable with ceramic and high quality tantalum capacitors Fast turn-on Thermal shutdown and short-circuit current limit Applications n n n n n CDMA cellular handsets Wideband CDMA cellular handsets GSM cellular handsets Portable information appliances Tiny 3.3V ± 5% to 2.85V, 150m A converter Key Specifications n 2.5 to 6.0V input range n 150m A guaranteed output Typical Application Circuit © 2004 National Semiconductor Corporation DS200205 .national...