Datasheet TL431 (Nexperia) - 4

Nexperia TL431 family Adjustable precision shunt regulators 8. Functional diagram
The TL431 family comprises a range of 3-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive and commercial temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V with two external resistors (see Figure 8). 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 like on-board regulation, adjustable power supplies and switching power supplies. CATHODE REF Vref ANODE 006aab569
Fig. 1. Functional diagram
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Product data sheet Rev. 7 — 30 April 2024 4 / 19
Document Outline 1. General description 2. Features and benefits 3. Applications 4. Quick reference data 5. Pinning information 6. Ordering information 7. Marking 8. Functional diagram 9. Limiting values 10. Recommended operating conditions 11. Thermal characteristics 12. Characteristics 13. Application information 14. Test information 15. Package outline 16. Soldering 17. Revision history 18. Legal information Contents