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

LP2989 (ACTIVE)

Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator

 

Recommended alternative parts

  • LP2989LV  -  For Output Voltages <= 2.3V
  • 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

View more

Parametrics Compare all products in Linear regulators (LDO)

 
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
Output capacitor type
PSRR @ 100 KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package size: mm2:W x L (PKG)
LP2989 LP2986 LP2987 LP2988 LP2989LV
Fixed Output     Adjustable Output
Fixed Output    
Fixed Output     Fixed Output     Fixed Output    
0.5     0.2     0.2     0.2     0.5    
16     16     16     16     16    
2.1     2.1     2.1     2.1     2.1    
5     5     5     5     1.8    
2.5     1.23     3     2.7     1.8    
2.5
2.8
3
3.3
3.8
5    
3
3.3
5    
3
3.3
5    
2.7
2.8
3
3.3
3.8
5    
1.8    
SOIC | 8
VSSOP | 8
WSON | 8    
SOIC | 8
VSSOP | 8
WSON | 8    
SOIC | 8
VSSOP | 8
WSON | 8    
SOIC | 8
VSSOP | 8
WSON | 8    
SOIC | 8    
Enable
Power Good    
Enable
Power Good    
Enable
Power Good    
Enable
Power Good    
Enable
Power Good    
1     1     1     1     1    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
35     38     160     160     35    
18     160     100     20     18    
1.01 | 1ku     0.68 | 1ku     0.76 | 1ku     0.82 | 1ku     1.02 | 1ku    
Catalog     Catalog     Catalog     Catalog     Catalog    
Ceramic     Non-Ceramic     Non-Ceramic     Non-Ceramic     Ceramic    
32     42     42     28      
2     3     2     2.4     1.6    
310     180     180     180     160    
0.11     0.1     0.1     0.1     0.11    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)    

Design tool

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