Adjustable precision shunt regulator (reverse pinout)
Same functionality and pinout but is not an equivalent to the compared device:
Product details
Parameters
Package | Pins | Size
Features
- Reference Voltage Tolerance at 25°C
- 0.5% (B Grade)
- 1% (A Grade)
- 2% (Standard Grade)
- Adjustable Output Voltage: Vref to 36 V
- Operation From −40°C to 125°C
- Typical Temperature Drift (TL43xB)
- 6 mV (C Temp)
- 14 mV (I Temp, Q Temp)
- Low Output Noise
- 0.2-Ω Typical Output Impedance
- Sink-Current Capability: 1 mA to 100 mA
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Description
The TL431LI / TL432LI are pin-to-pin alternatives to TL431 / TL432. TL43xLI offers better stability, lower temperature drift (VI(dev)), and lower reference current (Iref) for improved system accuracy.
The TL431 and TL432 devices are three-terminal adjustable shunt regulators, 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 0.2 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. The TL432 device has exactly the same functionality and electrical specifications as the TL431 device, but has different pinouts for the DBV, DBZ, and PK packages.
Both the TL431 and TL432 devices are offered in three grades, with initial tolerances (at 25°C) of 0.5%, 1%, and 2%, for the B, A, and standard grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.
The TL43xxC devices are characterized for operation from 0°C to 70°C, the TL43xxI devices are characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TL431 / TL432 Precision Programmable Reference datasheet (Rev. P) | Nov. 14, 2018 |
Application note | Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) | Dec. 11, 2019 | |
Selection guide | 431 Device Nomenclature (Rev. B) | Sep. 18, 2019 | |
Application note | Designing With the Improved TL431LI (Rev. A) | Jun. 28, 2019 | |
E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | Jun. 28, 2019 | |
E-book | Tips and tricks for designing with voltage references | May 30, 2017 | |
Technical article | Designing for isolated DC/DC converter shunt safety | Aug. 29, 2015 | |
Application note | Understanding stability boundary conditions charts in TL431, TL432 Data sheet (Rev. A) | Jan. 16, 2014 | |
Application note | Setting the shunt voltage on an adjustable shunt regulator | Sep. 01, 2011 | |
More literature | SLL Precision Reference Product Clip | Feb. 23, 2006 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download PMP21697 BOM.pdf (101KB) -
download PMP21697 Assembly Drawing.pdf (215KB) -
download PMP21697 PCB.pdf (1952KB) -
download PMP21697 CAD Files.zip (947KB) -
download PMP21697 Gerber.zip (638KB)
Design files
-
download PMP10737 BOM.pdf (84KB) -
download PMP10737 Gerber.zip (36KB)
Design files
-
download PMP10202 BOM.pdf (83KB) -
download PMP10202 PCB.pdf (732KB) -
download PMP10202 CAD Files.zip (570KB) -
download PMP10202 Gerber.zip (48KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOT-23 (DBV) | 5 | View options |
SOT-23 (DBZ) | 3 | View options |
SOT-89 (PK) | 3 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
TI E2E™ forums with technical support from TI engineers
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