LP2981 100-mA Ultra-Low Dropout Regulator With Shutdown, 1.25% Tolerance | TI.com

LP2981 (ACTIVE)

100-mA Ultra-Low Dropout Regulator With Shutdown, 1.25% Tolerance

 

Description

The LP2981 and LP2981A families of fixed-output, low-dropout regulators offer exceptional, cost-effective performance for both portable and non-portable applications. Available in fixed voltages of 2.8 V, 3 V, 3.3 V, and 5 V, the family has an output tolerance of 0.75% for the A-grade devices (1.25% for the standard grade) and is capable of delivering 100-mA continuous load current. Standard regulator features, such as overcurrent and overtemperature protection, are included.

The LP2981 and LP2981A have features that make the regulators ideal candidates for a variety of portable applications:

  • Low dropout: A PNP pass element allows a typical dropout of 200 mV at 100-mA load current and 7 mV at 1-mA load.
  • Low quiescent current: The use of a vertical PNP process allows for quiescent currents that are considerably lower than those associated with traditional lateral PNP regulators.
  • Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01 µA when the ON/OFF pin is pulled low.

Features

  • Output Tolerance of
    • 0.75% (A Grade)
    • 1.25% (Standard Grade)
  • Ultra-Low Dropout Typically:
    • 200 mV at Full Load of 100 mA
    • 7 mV at 1 mA
  • Low IQ: 600 µA Typical at Full Load of 100 mA
  • Shutdown Current: 0.01 µA Typical
  • Fast Transient Response to Line and Load
  • Overcurrent and Thermal Protection
  • High Peak Current Capability
  • Low ZOUT Over Wide Frequency Range
  • –40°C to 125°C 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)
LP2981 LP2981A LP2985 LP2985A
Fixed Output     Fixed Output     Fixed Output     Fixed Output    
0.1     0.1     0.15     0.15    
16     16     16     16    
2.2     2.2     2.2     2.2    
5     5     10     10    
2.8     2.8     1.8     1.8    
2.8
2.9
3
3.3
5    
2.8
2.9
3
3.3
5    
1.8
2.5
2.8
2.9
3
3.3
5
10    
1.8
2.5
2.8
2.9
3
3.3
5
10    
SOT-23 | 5     SOT-23 | 5     SOT-23 | 5     SOT-23 | 5    
Enable     Enable     Enable     N/A    
1     1     1     1    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
205     205     206     206    
160     160     30     30    
0.19 | 1ku     0.21 | 1ku     0.18 | 1ku     0.22 | 1ku    
Catalog     Catalog     Catalog     Catalog    
Non-Ceramic     Non-Ceramic     Ceramic     Ceramic
Non-Ceramic    
    40     40    
6     2     5     3    
200     200     280     280    
0.065     0.065     0.065     0.065    
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)     5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)     5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)     5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)