Datasheet TL431, TL431A, TL432, TL432A (Texas Instruments) - 7

SLVS005V − JULY 1978 − REVISED NOVEMBER 2003
electrical characteristics over recommended operating conditions, TA = 25
°
C (unless otherwise noted) TEST TL431I, TL432I TEST PARAMETER P TEST CONDITIONS UNIT CIRCUIT MIN TYP MAX
Vref Reference voltage 2 VKA = Vref, IKA = 10 mA 2440 2495 2550 mV Deviation of reference voltage V V KA = Vref, IKA = 10 mA, I(dev) over full temperature range 2 5 50 mV T (see Figure 1) A = −40°C to 85°C DV Ratio of change in reference voltage ∆VKA = 10 V − Vref −1.4 −2.7 ref 3 I mV KA I = 10 mA D KA V to the change in cathode voltage ∆V V KA KA = 36 V − 10 V −1 −2 Iref Reference current 3 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ 2 4 µA Deviation of reference current I I KA = 10 mA, R1 = 10 kΩ, R2 = ∞, I(dev) over full temperature range 3 0.8 2.5 µA T (see Figure 1) A = −40°C to 85°C Minimum cathode current for Imin 2 V regulation KA = Vref 0.4 1 mA Ioff Off-state cathode current 4 VKA = 36 V, Vref = 0 0.1 1 µA I |z KA = 1 mA to 100 mA, VKA = Vref, KA| Dynamic impedance (see Figure 1) 2 0.2 0.5 Ω f ≤ 1 kHz POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7