Adjustable precision shunt regulator
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.
Same functionality and pinout but is not an equivalent to the compared device:
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The ATL431EVM-001 evaluation module (EVM) features the functionality and adjustability of the ATL431 by letting you program the cathode voltage with various resistor values. You can also set the cathode current using the various resistors in series with the supply (...)
Features
- Adjustable regulated output from 2.5 V to 36 V
- Very-low operating current: IKA(min) = 35 µA (max) and IREF = 150 nA (max)
- Extended cathode current range from 35 µA to 100 mA
- Low output impedance of 0.3 Ω (max)
- Small form factor
- Ease of use
- Multiple gain setting options
- Stability test availability
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
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| PDIP (P) | 8 | View options |
| SC70 (DCK) | 6 | View options |
| SO (PS) | 8 | View options |
| SOIC (D) | 8 | View options |
| SOT-23 (DBV) | 5 | View options |
| SOT-23 (DBZ) | 3 | View options |
| SOT-89 (PK) | 3 | View options |
| TO-92 (LP) | 3 | View options |
| TSSOP (PW) | 8 | View options |