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TL431IZT Datasheet(PDF) 6 Page - STMicroelectronics |
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TL431IZT Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 21 page Electrical characteristics TL431, TL432 6/21 Doc ID 4467 Rev 11 Table 4. TL431I/TL432I (Tamb = 25°C unless otherwise specified) Symbol Parameter TL431I/TL432I TL431AI/TL432AI Unit Min. Typ. Max. Min. Typ. Max. Vref Reference input voltage VKA = Vref, Ik = 10 mA, Tamb = 25° C Tmin ≤ Tamb ≤ Tmax 2.44 2.41 2.495 2.55 2.58 2.47 2.44 2.495 2.52 2.55 V ΔVref Reference input voltage deviation over temperature range (1) VKA = Vref, Ik =10 mA, Tmin≤ Tamb≤ Tmax 730 7 30 mV Ratio of change in reference input voltage to change in cathode to anode voltage Ik = 10 mA, ΔVKA = 10 V to Vref ΔVKA = 36 V to 10 V -2.7 -2 -1.4 -1 -2.7 -2 -1.4 -1 mV/V Iref Reference input current Ik = 10 mA, R1 = 10 kΩ, R2 = ∞ Tamb = 25° C Tmin ≤ Tamb ≤ Tmax 1.8 4 6.5 1.8 4 6.5 µA ΔIref Reference input current deviation over temperature range Ik = 10 mA, R1 = 10 kΩ, R2 = ∞ Tmin ≤ Tamb ≤ Tmax 0.8 2.5 0.8 1.2 µA Imin Minimum cathode current for regulation VKA = Vref 0.5 1 0.5 0.7 mA Ioff Off-state cathode current 2.6 1000 2.6 1000 nA ⏐ZKA⏐ Dynamic impedance (2) VKA = Vref, Δ Ik = 1 to 100 mA, f ≤ 1kHZ 0.22 0.5 0.22 0.5 Ω 1. See definition of Section 3.1: Reference input voltage deviation over temperature range below. 2. The dynamic impedance is defined as |ZKA| = ΔVref ΔVka ------------ ΔV KA I k Δ ---------------- |
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