ATL432LI High-bandwidth low-IQ programmable shunt regulator | TI.com

ATL432LI (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

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Part number Order 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)
ATL432LI Order now Adjustable     2.5     2.5     36     0.5
1    
66     Catalog     -40 to 85
-40 to 125    
80     15     SOT-23 | 3     0.4     0.3    
ATL431 Order now Adjustable     2.5     2.5     36     0.5
1    
92     Catalog     -40 to 125
-40 to 85    
20     100     SOT-23 | 3     0.15     0.05    
ATL431LI Order now Adjustable     2.5     2.5     36     0.5
1    
66     Catalog     -40 to 125
-40 to 85    
80     15     SOT-23 | 3     0.4     0.3    
ATL432 Order now Adjustable     2.5     2.5     36     0.5
1    
92     Catalog     -40 to 125
-40 to 85    
20     100     SOT-23 | 3     0.15     0.05    
TL431 Order now Adjustable     2.495     2.495     36     0.5
1
2    
92     Catalog     -40 to 85
-40 to 125
0 to 70    
400     100     PDIP | 8
SC70 | 6
SOIC | 8
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
SO | 8
TO-92 | 3
TSSOP | 8    
4     2.5    
TL431LI Order now Adjustable     2.495     2.495     36     0.5
1    
63     Catalog     -40 to 125
-40 to 85
0 to 70    
400     15     SOT-23 | 3     0.4     0.3    
TL432 Order now Adjustable     2.495     2.495     36     0.5
1
2    
92     Catalog     -40 to 125
-40 to 85
0 to 70    
400     100     SOT-23 | 3
SOT-23 | 5
SOT-89 | 3    
4     2.5