Single Output LDO, 100mA, Adjustable, Wide Vin Range, RESET Flag - LP2951


Single Output LDO, 100mA, Adjustable, Wide Vin Range, RESET Flag


The LP2950 and LP2951 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 outputs a fixed 5 V, 3.3 V, or 3 V (depending on the version). Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.


  • Wide Input Range: Up to 30 V
  • Rated Output Current of 100 mA
  • Low Dropout: 380 mV (Typ) at 100 mA
  • Low Quiescent Current: 75 µA (Typ)
  • Tight Line Regulation: 0.03% (Typ)
  • Tight Load Regulation: 0.04% (Typ)
  • High VO Accuracy
    • 1.4% at 25°C
    • 2% Over Temperature
  • Can Be Used as a Regulator or Reference
  • Stable With Low ESR (>12 mΩ) Capacitors
  • Current- and Thermal-Limiting Features
  • LP2950 Only (3-Pin)
    • Fixed-Output Voltages of 5 V, 3.3 V, and 3 V
  • LP2951 Only (8-Pin Package)
    • Fixed- or Adjustable-Output Voltages:
      5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ
    • Low-Voltage Error Signal on Falling Output
    • Shutdown Capability
    • Remote Sense Capability for Optimal Output
      Regulation and Accuracy

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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
Operating Temperature Range (C)
Approx. Price (US$)
LP2951 LP2951-30 LP2951-33 LP2951-50
0.1     0.1     0.1     0.1    
Adjustable Output     Fixed Output     Fixed Output     Fixed Output    
2     3.4     3.7     5.4    
30     30     30     30    
  3     3.3     5    
1.2     3     3.3     5    
29     3     3.3     5    
0.075     0.075     0.075     0.075    
380     380     380     380    
2     2     2     2    
160     160     160     160    
53     53     53     53    
Non-Ceramic     Non-Ceramic     Non-Ceramic     Non-Ceramic    
Overcurrent Protection
Thermal Shutdown    
Overcurrent Protection
Thermal Shutdown    
Overcurrent Protection
Thermal Shutdown    
Overcurrent Protection
Thermal Shutdown    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
0.18 | 1ku     0.18 | 1ku     0.18 | 1ku     0.18 | 1ku    
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    Min   Max   Range  
  Vin V 2.3 to 30.0V  
  Vout V 1.23 to 29.0V  
  Iout A ≤ 0.1A  
  Ambient Temp °C -40 to 125°C  
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