TL431LI-Q1 Automotive adjustable precision shunt regulator with optimized reference current (pin layout: KRA) | TI.com

TL431LI-Q1
This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation
Automotive adjustable precision shunt regulator with optimized reference current (pin layout: KRA)

 

Sample availability

Preproduction samples are available (PTL431LIAQDBZRQ1 and PTL431LIBQDBZRQ1). Order now

Description

The TL431LI-Q1 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 2.495 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.65 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 industry standard TL431, with optimized Iref and IIdev performance. The lower Iref and IIdev values enable designers to achieve higher system accuracy and lower leakage current. The TL432LI-Q1 device has exactly the same functionality and electrical specifications as the TL431LI-Q1 device, but has a different pinout for the DBZ package.

The TL431LI-Q1 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 TL43xLI-Q1 devices are characterized for operation from –40°C to 125°C.

Features

  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
  • Minimum typical output voltage: 2.495 V
  • Adjustable output voltage: Vref to 36 V
  • Operation from −40°C to +125°C
  • Grade 0 option from -40°C to +150°C
  • 27 mV maximum temperature drift
  • 0.65-Ω typical output impedance
  • Sink-current capability
    • Imin = 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)
TL431LI-Q1 Order now Adjustable     2.495     2.495     36     0.5
1    
63     Automotive     -40 to 125     400     15     SOT-23 | 3     0.4     0.3    
ATL431LI-Q1 Order now Adjustable     2.5     2.5     36     0.5
1    
66     Automotive     -40 to 125     80     15     SOT-23 | 3     0.4     0.3    
ATL432LI-Q1 Order now Adjustable     2.5     2.5     36     0.5
1    
66     Automotive     -40 to 125     80     15     SOT-23 | 3     0.4     0.3    
TL431-Q1 Order now Adjustable     2.495     2.495     36     0.5
1    
92     Automotive     -40 to 125     400     100     SOT-23 | 3
SOT-23 | 5    
4     2.5    
TL432-Q1 Order now Adjustable     2.495     2.495     36     0.5
1    
92     Automotive     -40 to 125     400     100     SOT-23 | 3     4     2.5    
TL432LI-Q1 Order now Adjustable     2.495     2.495     36     0.5
1    
63     Automotive     -40 to 125     400     15     SOT-23 | 3     0.4     0.3    
TLV431A-Q1 Samples not available Adjustable     1.24     1.24     6     1     161     Automotive     -40 to 125     55     15     SOT-23 | 5