Series of Adjustable Micropower Voltage Regulators - LP2950-N

LP2950-N (ACTIVE)

Series of Adjustable 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 (75μA typ.) and very low dropout voltage (typ. 40mV at light loads and 380mV at 100mA). 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.

The LP2950-N-5.0 is available in the surface-mount PFM package, and in the popular 3-pin TO-92 package for pin-compatibility with older 5V regulators. The 8-lead LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.

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 5V, 3V, or 3.3V output (depending on the version), or programmed from 1.24V to 29V with an external pair of resistors.

Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (.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.

Features

  • 5V, 3V, and 3.3V Versions Available
  • High Accuracy Output Voltage
  • Ensured 100mA 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 (10mΩ to 6Ω)

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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    
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-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    

Related end equipment

  • Error Flag Warns of Output Dropout
  • Logic-Controlled Electronic Shutdown
  • Output Programmable From 1.24 to 29V

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