Series of Fixed Micropower Voltage Regulators - LP2950-N

LP2950-N (ACTIVE)

Series of Fixed Micropower Voltage Regulators

Recommended alternative parts

  • LP2980-N  -  Improved Input Voltage, Output Current And Dropout Voltage.
  • LP2981-N  -  Improved Input Voltage, Dropout Voltage And Quiescent Current.
  • 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
  • LP5900  -  Wide Selection Of Voltage Options

Description

The LP2950-N and LP2951-N are micropower voltage regulators with very low quiescent current (75 µA typical) and very low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP2950-N/LP2951-N increases only slightly in dropout, prolonging battery life.

Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (0.5% typ.), extremely good load and line regulation (.05% typ.) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.

One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5-V, 3-V, or 3.3-V output (depending on the version), or programmed from 1.24 V to 29 V with an external pair of resistors.

The LP2950-N is available in the surface-mount TO-252 package and in the popular 3-pin TO-92 package for pin-compatibility with older 5-V regulators. The 8-lead LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.

Features

  • Input Voltage Range: 2.3 V to 30 V
  • 5-V, 3-V, and 3.3-V Output Voltage Versions
    Available
  • High Accuracy Output Voltage
  • Ensured 100-mA Output Current
  • Extremely Low Quiescent Current
  • Low Dropout Voltage
  • Extremely Tight Load and Line Regulation
  • Very Low Temperature Coefficient
  • Use as Regulator or Reference
  • Needs Minimum Capacitance for Stability
  • Current and Thermal Limiting
  • Stable With Low-ESR Output Capacitors
    (10 mΩ to 6 Ω)
  • LP2951-N Versions Only:
    • Error Flag Warns of Output Dropout
    • Logic-Controlled Electronic Shutdown
    • Output Programmable From 1.24 V to 29 V

View more

Parametrics Compare all products in Single Channel LDO

 
Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Fixed Output Options (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
Noise (uVrms)
PSRR @ 100KHz (dB)
Output Capacitor Type
Additional Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LP2950-N LP2980-N LP2981-N LP38691 LP38691-Q1 LP38693 LP38693-Q1 LP3878-ADJ LP5900
0.1     0.05     0.1     0.5     0.5     0.5     0.5     0.8     0.15    
Fixed Output     Fixed Output     Fixed Output     Fixed Output     Fixed Output     Fixed Output     Fixed Output     Adjustable Output     Fixed Output    
  2.1     2.7     2.7     2.7     2.7     2.7     2.5     2.5    
30     16     16     10     10     10     10     16     5.5    
3
3.3
5    
2.5
3
3.3
3.8
4.7
5    
2.5
3
3.3
3.6
5    
1.8
2.5
3.3
5    
1.8
2.5
3.3
5    
1.8
2.5
3.3
5    
1.8
2.5
3.3
5    
  1.5
2.8
3.3
4.5    
3     2.5     2.5     1.8     1.8     1.8     1.8     1     1.5    
5     5     5     5     5     5     5     5.5     4.5    
0.075     0.065     0.065     0.055     0.055     0.055     0.055     5.5     0.025    
380     120     200     250
330
430    
250
330
430    
250
330
430    
250
330
430    
475     80    
      4     4     4     4     3     2    
                6.5    
      50     50     50     50     35     40    
Ceramic     Ceramic       Ceramic       Ceramic       Ceramic     Ceramic    
Overcurrent Protection
Thermal Shutdown    
Enable
Overcurrent Protection
Thermal Shutdown    
Enable
Overcurrent Protection
Thermal Shutdown    
Enable
Overcurrent Protection
Thermal Shutdown
Foldback Overcurrent Protection    
Enable
Overcurrent Protection
Thermal Shutdown
Foldback Overcurrent Protection    
Enable
Overcurrent Protection
Thermal Shutdown
Foldback Overcurrent Protection    
Enable
Overcurrent Protection
Thermal Shutdown
Foldback Overcurrent Protection    
Enable
Overcurrent Protection
Thermal Shutdown    
Enable
Overcurrent Protection
Thermal Shutdown    
Catalog     Catalog     Catalog     Catalog     Automotive     Catalog     Automotive     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125       -40 to 125    
3TO-252
3TO-92    
5SOT-23     5SOT-23     3TO-252
6WSON    
6WSON     5SOT-223
6WSON    
6WSON     8SO PowerPAD
8WSON    
4DSBGA
6WSON    
0.25 | 1ku     0.22 | 1ku     0.34 | 1ku     0.50 | 1ku     0.65 | 1ku     0.50 | 1ku     0.62 | 1ku     0.80 | 1ku     0.20 | 1ku    

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