LP2989IMX-1.8SLASHNOPB.B中文资料德州仪器数据手册PDF规格书

1 Features

1• 2.1-V to 16-V Input Voltage Range

• Ultra-Low Dropout Voltage

• 500-mA Continuous Output Current

• Very Low Output Noise With External Capacitor

• < 0.8-μA Quiescent Current When Shut Down

• 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

2 Applications

• Notebooks and Desktop PCs

• PDAs and Palmtop Computers

• Wireless Communication Pins

• SMPS Post-Regulators

3 Description

The LP2989LV 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 LP2989LV delivers superior

performance:

Ground Pin Current: Typically 3 mA at 500-mA load,

and 110 μA at 100-μA load.

Sleep Mode: The LP2989LV 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 greater than or equal to 2 V, see

the LP2989 (SNVS083) data sheet.