1A Low Dropout Adjustable Regulator



The LM2941 positive voltage regulator features the ability to source 1 A of output current with a typical dropout voltage of 0.5 V and a maximum of 1 V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground pin current when the differential between the input voltage and the output voltage exceeds approximately 3 V. The quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3 V).

Designed also for vehicular applications, the LM2941 and all regulated circuitry are protected from reverse battery installations or two-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. Familiar regulator features such as short circuit and thermal overload protection are also provided.


  • Operating VIN Range: 6 V to 26 V
  • Output Voltage Adjustable From 5 V to 20 V
  • Dropout Voltage Typically 0.5 V at IOUT = 1 A
  • Output Current in Excess of 1 A
  • Trimmed Reference Voltage
  • Reverse Battery Protection
  • Internal Short-Circuit Current Limit
  • Mirror Image Insertion Protection
  • P+ Product Enhancement Tested
  • TTL, CMOS Compatible ON/OFF Switch
  • WSON Space-Saving Package

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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
Operating Temperature Range (C)
Noise (uVrms)
Output Capacitor Type
PSRR @ 100KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package Size: mm2:W x L (PKG)
LM2941 LP38692
Adjustable Output    Fixed Output   
1    1   
26    10   
6    2.7   
20    5   
5    1.8   
-40 to 125    -40 to 125   
600    80   
Catalog    Catalog   
67    50   
5    1.4   
500    450   
10    0.055   
5DDPAK/TO-263: 155 mm2: 15.24 x 10.16(DDPAK/TO-263)
See datasheet (TO-220)
See datasheet (WSON)   
5SOT-223: 45 mm2: 6.96 x 6.5(SOT-223)
See datasheet (WSON)   
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WEBENCH® Designer LM2941

  Min   Max Range
Vin  V 6.0 to 26.0V
Vout  V 5.0 to 20.0V
Iout  A ≤ 1A
Ambient Temp  °C -40 to 125°C

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