LMV431 (ACTIVE)

Low-Voltage (1.24V) Adjustable Precision Shunt Regulators

Low-Voltage (1.24V) Adjustable Precision Shunt Regulators - LMV431
 

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  • LM4050-N  -  Better Temperature Coefficient and Initial Accuracy

Description

The LMV431, LMV431A and LMV431B are precision 1.24 V shunt regulators capable of adjustment to 30 V. Negative feedback from the cathode to the adjust pin controls the cathode voltage, much like a non-inverting op amp configuration (Refer to Symbol and Functional Diagrams). A two-resistor voltage divider terminated at the adjust pin controls the gain of a 1.24 V band-gap reference. Shorting the cathode to the adjust pin (voltage follower) provides a cathode voltage of a 1.24 V.

The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1%, and 0.5%, and functionally lend themselves to several applications that require zener diode type performance at low voltages. Applications include a 3 V to 2.7 V low drop-out regulator, an error amplifier in a 3 V off-line switching regulator and even as a voltage detector. These parts are typically stable with capacitive loads greater than 10 nF and less than 50 pF.

The LMV431, LMV431A and LMV431B provide performance at a competitive price.

Features

  • Low-Voltage Operation/Wide Adjust Range
    (1.24 V/30 V)
  • 0.5% Initial Tolerance (LMV431B)
  • Temperature Compensated for Industrial
    Temperature Range (39 PPM/°C for
    the LMV431AI)
  • Low Operation Current (55 µA)
  • Low Output Impedance (0.25 Ω)
  • Fast Turn-On Response
  • Low Cost

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Parametrics Compare all products in Shunt Voltage Reference

 
Reference Voltage
VO (V)
VO Adj (Min) (V)
VO Adj (Max) (V)
Initial Accuracy (Max) (%)
Temp Coeff (Max) (ppm/ degree C)
Rating
Operating Temperature Range (C)
Iz for Regulation (Min) (uA)
Iout/Iz (Max) (mA)
Package Group
LMV431 ATL431 LM431 TL431 TL431A TL431B
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
1.24    2.5    2.5    2.495    2.495    2.495   
1.24    2.5    2.5    2.495    2.495    2.495   
30    36    36    36    36    36   
1.5    0.5
1   
0.5
1
2   
2    1    0.5   
129
138   
92    97    92    92    92   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85
0 to 70   
-40 to 125
-40 to 85   
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
80    20    400    400    400    400   
15    100    100    100    100    100   
SOT-23
TO-92   
SOT-23    SOIC
SOT-23
TO-92   
PDIP
SC70
SO
SOIC
SOT-23
SOT-23
SOT-89
TO-92
TSSOP   
PDIP
SC70
SO
SOIC
SOT-23
SOT-23
SOT-89
TO-92
TSSOP   
PDIP
SC70
SO
SOIC
SOT-23
SOT-23
SOT-89
TO-92
TSSOP