LMV431 低电压 (1.24V) 可调节精密并联稳压器 | 德州仪器 TI.com.cn

LMV431 (正在供货)

低电压 (1.24V) 可调节精密并联稳压器

低电压 (1.24V) 可调节精密并联稳压器 - LMV431
数据表
 

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描述

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.

特性

  • 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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参数 与其它产品相比 并联电压基准

 
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