LP2989 Datasheet | National Semiconductor

Description The LP2989 is a fixed-output 500 m A precision LDO regulator designed for use with ceramic output capacitors. Output noise can be reduced to 18µV (typical) by connecting an external 10 n F capacitor to the bypass pin. Using an optimized VIP™ (Vertically Integrated PNP) process, the LP2989 delivers superior performance: Dropout Voltage: Typically 310 m V @ 500 m A load, and 1 m V @ 100 µA load. Ground Pin Current: Typically 3 m A @ 500 m A load, and 110 µA @ 100 µA load. Sleep Mode: The LP2989 draws less than 0.8 µA quiescent current when shutdown pin is pulled low. Error Flag: The built-in error flag goes low when the output drops approximately 5% below nominal. Precision Output: Guaranteed output voltage accuracy is 0.75% (“A” grade) and 1.25% (standard grade) at room temperature. Features n n n n n n n n n n n Ultra low dropout voltage Guaranteed 500 m A continuous output current Very low output noise with external capacitor SO-8 surface mount package < 0.8 µA quiescent current when shutdown Low ground pin current at all loads 0.75% output voltage accuracy (“A” grade) High peak current capability (800 m A typical) Wide supply voltage range (16V max) Overtemperature/overcurrent protection - 40˚C to +125˚C junction temperature range Applications n n n n Notebook/Desktop PC PDA/Palmtop puter Wireless munication Terminals SMPS Post-Regulator Block Diagram DS101339-1 VIP™ is a trademark of National Semiconductor Corporation. © 2000 National Semiconductor Corporation DS101339 .national. Connection Diagram Surface Mount Packages: SO-8 Package Type M: See NS Package Drawing Number M08A DS101339-2 Ordering Information TABLE 1. Package Marking and Ordering Information for SO-8 (M) Devices Output Voltage 2.5 2.5 2.5 2.5 Grade A A STD STD Order Information LP2989AIMX-2.5 LP2989AIM-2.5 LP2989IMX-2.5 LP2989IM-2.5 Package Marking 2989AIM2.5 2989AIM2.5 2989IM2.5 2989IM2.5 Supplied as: 2500 Units on Tape and Reel Shipped in Anti-Static Rails 2500 Units on...