• 2.1-V to 16-V Input Voltage Range
• 2.5-V to 5-V Fixed Output Voltage Options
• Ultra-Low Dropout Voltage
• 500-mA Continuous Output Current
• Very Low Output Noise With External Capacitor
• < 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-mA typical)
• Overtemperature and Overcurrent Protection
• −40°C to 125°C Junction Temperature Range

• Notebooks and Desktop PCs
• PDAs and Palmtop Computers
• Wireless Communication Pins
• SMPS Post-Regulators

The LP2989 is a fixed-output 500-mA precision LDO regulator designed for use with ceramic output capacitors.

Output noise can be reduced to 18 μV (typical) by connecting an external 10-nF capacitor to the bypass pin.

Using an optimized Vertically Integrated PNP (VIP) process, the LP2989 delivers superior performance:

• Dropout Voltage: Typically 310 mV at 500-mA load, and 1 mV at 100-µA load.
• Ground Pin Current: Typically 3 mA at 500-mA load, and 110 µA at 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: Output voltage accuracy is 0.75% (A grade) and 1.25% (standard grade) at room temperature.

For output voltages < 2 V, see LP2989LV (SNVS086) data sheet.