ATL431LI High-bandwidth low-Iq programmable shunt regulator | TI.com

ATL431LI (ACTIVE)

High-bandwidth low-Iq programmable shunt regulator

 

Description

The ATL43xLI device is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.3 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the TL431LI and TL432LI, with lower minimum operating current to help reduce system power consumption. The ATL432LI device has exactly the same functionality and electrical specifications as the ATL431LI device, but has a different pinout for the DBZ package.

The ATL431LI device is offered in two grades, with initial tolerances (at 25°C) of 0.5%, and 1%, for the B and A grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.

The ATL43xLIxQ devices are characterized for operation from –40°C to +125°C.

Features

  • Reference Voltage Tolerance at 25°C
    • 0.5% (B Grade)
    • 1% (A Grade)
  • Minimum Typical Output Voltage: 2.5 V
  • Adjustable Output Voltage: Vref to 36 V
  • Operation From −40°C to +125°C (Q temp)
  • Maximum Temperature Drift
    • 17 mV (I Temp)
    • 27 mV (Q Temp)
  • 0.3-Ω Typical Output Impedance
  • Sink-Current Capability
    • Imin = 0.1 mA (max)
    • IKA = 15 mA (max)
  • Reference Input Current IREF: 0.4 µA (max)
  • Deviation of Reference Input Current over Temperature, II(dev): 0.3 µA (max)

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Parametrics Compare all products in Shunt voltage references

 
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
Iref (uA)
I I(dev) (uA)
ATL431LI ATL431 ATL432 ATL432LI TL431 TL431LI TL432 TL432LI
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
2.5     2.5     2.5     2.5     2.495     2.495     2.495     2.495    
2.5     2.5     2.5     2.5     2.495     2.495     2.495     2.495    
36     36     36     36     36     36     36     36    
0.5
1    
0.5
1    
0.5
1    
0.5
1    
0.5
1
2    
0.5
1    
0.5
1
2    
0.5
1    
92     92     92     92     92     63     92     63    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125
-40 to 85    
-40 to 125
-40 to 85    
-40 to 125     -40 to 85
-40 to 125    
-40 to 85
-40 to 125
0 to 70    
-40 to 125
-40 to 85
0 to 70    
-40 to 125
-40 to 85
0 to 70    
-40 to 85
-40 to 125
0 to 70    
80     20     20     80     400     400     400     400    
15     100     100     15     100     15     100     15    
SOT-23 | 3     SOT-23 | 3     SOT-23 | 3     SOT-23 | 3     PDIP | 8
SC70 | 6
SOIC | 8
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
SO | 8
TO-92 | 3
TSSOP | 8    
SOT-23 | 3     SOT-23 | 3
SOT-23 | 5
SOT-89 | 3    
SOT-23 | 3    
0.8     0.15     0.15     0.8     4     0.8     4     0.8    
0.4     0.05     0.05     0.4     2.5     0.4     2.5     0.4