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LP2989

SNVS083O – FEBRUARY 2005 – REVISED MARCH 2015

LP2989 Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With

Ceramic Output Capacitors

1 Features

3 Description

The LP2989 is a fixed-output 500-mA precision LDO

1

•

2.1-V to 16-V Input Voltage Range

regulator designed for use with ceramic output

•

2.5-V to 5-V Fixed Output Voltage Options

capacitors.

•

Ultra-Low Dropout Voltage

Output noise can be reduced to 18

μV (typical) by

•

500-mA Continuous Output Current

connecting an external 10-nF capacitor to the bypass

•

Very Low Output Noise With External Capacitor

pin.

•

< 0.8-µA Quiescent Current When Shutdown

Using an optimized Vertically Integrated PNP (VIP)

•

Low Ground Pin Current at All Loads

process, the LP2989 delivers superior performance:

•

Dropout Voltage: Typically 310 mV at 500-mA

•

0.75% Output Voltage Accuracy (A Grade)

load, and 1 mV at 100-µA load.

•

High Peak Current Capability (800-mA typical)

•

Ground Pin Current: Typically 3 mA at 500-mA

•

Overtemperature and Overcurrent Protection

load, and 110 µA at 100-µA load.

•

−40°C to 125°C Junction Temperature Range

•

Sleep Mode: The LP2989 draws less than 0.8-µA

quiescent current when SHUTDOWN pin is pulled

2 Applications

low.

•

Notebooks and Desktop PCs

•

Error Flag: The built-in error flag goes low when

the

output

drops

approximately

5%

below

•

PDAs and Palmtop Computers

nominal.

•

Wireless Communication Pins

•

Precision Output: Output voltage accuracy is

•

SMPS Post-Regulators

0.75% (A grade) and 1.25% (standard grade) at

room temperature.

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

data sheet.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

WSON (8)

4.00 mm x 4.00 mm

LP2989

SOIC (8)

4.90 mm x 3.91 mm

VSSOP (8)

3.00 mm x 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Typical Application

*Capacitance values shown are minimum required to assure stability, but may be increased without limit. Larger

output capacitor provides improved dynamic response. See the Output Capacitor section.

**Shutdown must be actively terminated (see the Shutdown Input Operation section). Tie to IN (pin 4) if not use.

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.