TL431LI
- 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 (Q Temp)
- Maximum Temperature Drift
- 10 mV (C Temp)
- 17 mV (I Temp)
- 27 mV (Q Temp)
- 0.3-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)
The TL431LI 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 0.3 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 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 device has exactly the same functionality and electrical specifications as the TL431LI device, but has a different pinout for the DBZ package.
The TL431LI 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 TL43xLIxQ devices are characterized for operation from –40°C to 125°C.
기술 자료
설계 및 개발
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ATL431EVM-001 — ATL431 조정 가능 션트 레귤레이터 평가 모듈
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. (...)
SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator
많은 TI 레퍼런스 설계에는 TL431LI이(가) 포함됩니다.
레퍼런스 디자인 선택 툴을 사용하여 애플리케이션 및 매개 변수에 가장 적합한 설계를 검토하고 식별할 수 있습니다.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| SOT-23 (DBZ) | 3 | Ultra Librarian |