LP2989_15 Datasheet, PDF (1/34 Pages) Texas Instruments – LP2989 Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output Capacitors

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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
•1 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
2 Applications
• Notebooks and Desktop PCs
• PDAs and Palmtop Computers
• Wireless Communication Pins
• SMPS Post-Regulators
3 Description
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.
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.