LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator | TI.com

LP2989
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator

 

Recommended alternative parts

  • TPS7A26  -  An 18-V, 500-mA LDO regulator with power-good and ultra-low IQ (2.5 μA)
  • LP2989LV  -  For output voltages less than or equal to 2.3 V
  • LP38691  -  Higher load capability & lower ground current
  • LP38691-Q1  -  Higher load capability & lower ground current
  • LP38693  -  Higher load capability & lower ground current
  • LP38693-Q1  -  Higher load capability & lower ground current
  • LP3878-ADJ  -  Improved output current

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.

Features

  • 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

WEBENCH® Designer LP2989

  Min   Max Range
Vin  V 2.81 to 16.0V
Product Option
Vout  V
Iout  A ≤ 0.5A
Ambient Temp  °C -40.0 to 125.0°C

Parametrics

Compare all products in Linear regulators (LDO) Email Download to Excel
Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Fixed output options (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LP2989 Order now Fixed Output     0.5     16     2.1     5     2.5     2.5
2.8
3
3.3
3.8
5    
SOIC | 8
VSSOP | 8
WSON | 8    
Enable
Power Good    
1     -40 to 125     35     18     1.01 | 1ku     Catalog     32     2     310     0.11     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
8WSON: 16 mm2: 4 x 4 (WSON | 8)    
LP2986 Order now Adjustable Output
Fixed Output    
0.2     16     2.1     5     1.23     3
3.3
5    
SOIC | 8
VSSOP | 8
WSON | 8    
Enable
Power Good    
1     -40 to 125     38     160     0.68 | 1ku     Catalog     42     3     180     0.1     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
8WSON: 16 mm2: 4 x 4 (WSON | 8)    
LP2987 Order now Fixed Output     0.2     16     2.1     5     3     3
3.3
5    
SOIC | 8
VSSOP | 8
WSON | 8    
Enable
Power Good    
1     -40 to 125     160     100     0.76 | 1ku     Catalog     42     2     180     0.1     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
8WSON: 16 mm2: 4 x 4 (WSON | 8)    
LP2988 Order now Fixed Output     0.2     16     2.1     5     2.7     2.7
2.8
3
3.3
3.8
5    
SOIC | 8
VSSOP | 8
WSON | 8    
Enable
Power Good    
1     -40 to 125     160     20     0.82 | 1ku     Catalog     28     2.4     180     0.1     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
8WSON: 16 mm2: 4 x 4 (WSON | 8)    
LP2989LV Samples not available