1A Low Dropout Adjustable Regulator - LM2941

LM2941 (ACTIVE)

1A Low Dropout Adjustable Regulator

Description

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.

Features

  • 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 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 (%)
PSRR @ 100KHz (dB)
Output Capacitor Type
Additional Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LM2941 LP38690 LP38692
1     1     1    
Adjustable Output     Fixed Output     Fixed Output    
-15     2.7     2.7    
26     10     10    
  1.8
2.5
3.3
5    
1.8
2.5
3.3
5    
5     1.8     1.8    
20     5     5    
10     0.055     0.055    
500     450
650
800
950    
450
650
800
950    
5     5     5    
67     50     50    
  Ceramic     Ceramic    
Enable
Overcurrent Protection
Thermal Shutdown    
Enable
Overcurrent Protection
Thermal Shutdown
Foldback Overcurrent Protection    
Enable
Overcurrent Protection
Thermal Shutdown
Foldback Overcurrent Protection    
Military     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125    
5DDPAK/TO-263
5TO-220
8WSON    
3TO-252
6WSON    
5SOT-223
6WSON    
  0.53 | 1ku     0.53 | 1ku    

Related end equipment

  • Industrial
  • Automotive

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Featured tools and software

WEBENCH® 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  
Footprint BOM Cost Efficiency
 
   
 
 
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