Datasheet

TL1431 Electrical characteristics
Doc ID 5286 Rev 5 5/18
3 Electrical characteristics
T
amb
= 25 °C (unless otherwise specified).
Table 3. Electrical characteristics for TL1431C, TL1431AC
Symbol Parameter
TL1431C TL1431AC
Unit
Min. Typ. Max. Min. Typ. Max.
V
ref
Reference input voltage - see Figure 4
V
KA
= V
ref
, I
k
= 10 mA
2.490 2.500 2.510 2.493 2.500 2.507 V
ΔV
ref
Reference input voltage deviation over
temperature range
(1)
- see Figure 4
V
KA
= V
ref
, I
k
= 10 mA, T
min
≤ T
amb
≤ T
max
320 320mV
Temperature coefficient of reference input
voltage
(2)
V
KA
= V
ref
, I
k
= 10 mA, T
min
≤ T
amb
≤ T
max
±13 ±90 ±13 ±90 ppm/°C
Ratio of change in reference input voltage to
change in cathode to anode voltage - see
Figure 5
I
k
= 10mA - ΔV
KA
= 36V to 3V
-2 -1.1 -2 -1.1 mV/V
I
ref
Reference input current
I
k
= 10mA, R1 = 10kΩ, R2 = ∞
T
min
≤ T
amb
≤ T
max
1.5 2.5
3
1.5 2.5
3
µA
ΔI
ref
Reference input current deviation over
temperature range
I
k
= 10mA, R1 = 10kΩ, R2 =∞, T
min
≤ T
amb
≤
T
max
0.2 1.2 0.2 1.2 µA
I
min
Minimum cathode current for regulation - Figure 4
V
KA
= V
ref
0.5 1 0.5 0.6 mA
I
off
Off-state cathode current - see Figure 6 180 500 180 500 nA
⏐Z
KA
⏐
Dynamic impedance
(3)
V
KA
= V
ref
, ΔI
k
= 1 to100mA, f ≤ 1kHz
0.2 0.5 0.2 0.5 Ω
1. See Reference input voltage deviation over temperature range in Section 4: Parameter definitions on page 11 .
2. See
Temperature coefficient of reference input voltage in Section 4: Parameter definitions on page 11 .
3. See
Dynamic impedance in Section 4: Parameter definitions on page 11 .
ΔVref
ΔT
----------------
ΔVref
ΔVka
----------------