LP2989

ACTIVE

Texas Instruments LP2989 Product Info

1 April 2026 0

Rating	Catalog
Vin (max) (V)	16
Vin (min) (V)	2.1
Iout (max) (A)	0.5
Output options	Fixed Output
Vout (max) (V)	5
Vout (min) (V)	2.5
Fixed output options (V)	2.5, 2.8, 3, 3.3, 5
Noise (µVrms)	18
PSRR at 100 KHz (dB)	32
Iq (typ) (mA)	0.11
Features	Enable, Power good
Thermal resistance θJA (°C/W)	35, 114, 156
Load capacitance (min) (µF)	4.7
Regulated outputs (#)	1
Accuracy (%)	2
Dropout voltage (Vdo) (typ) (mV)	310
Operating temperature range (°C)	-40 to 125

SOIC (D)-8-29.4 mm² 4.9 x 6

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.

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.

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