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


Functional diagram


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


Iout (Max) (A) 0.1    
Output Options Adjustable Output    
Vin (Min) (V) 2    
Vin (Max) (V) 30    
Fixed Output Options (V)  
Vout (Min) (V) 1.2    
Vout (Max) (V) 29    
Iq (Typ) (mA) 0.075    
Vdo (Typ) (mV) 380    
Accuracy (%) 2    
Noise (uVrms) 160    
PSRR @ 100KHz (dB) 53    
Output Capacitor Type Non-Ceramic    
Additional Features Overcurrent Protection^Thermal Shutdown    
Rating Catalog    
Operating Temperature Range (C) -40 to 125    
Pin/Package 8SOIC    
Approx. Price (US$) 0.18 | 1ku    

Companion Products

Technical Documents

Datasheet (1)

Application notes (27)

Selection guides (2)

Solution guides (2)

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