TL431B Datasheet, PDF (13/40 Pages) Texas Instruments – ADJUSTABLE PRECISION SHUNT REGULATORS

TL431, TL431A, TL431B, TL432, TL432A, TL432B
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS543A – AUGUST 2004 − REVISED AUGUST 2004
electrical characteristics over recommended operating conditions, T_A = 25°C (unless otherwise
noted)
Vref
VI(dev)
DV_ref
DV_KA
Iref
II(dev)
Imin
Ioff
|zKA|
PARAMETER
TEST
CIRCUIT
TEST CONDITIONS
Reference voltage
Deviation of reference voltage
over full temperature range
(see Figure 1)
2
VKA = Vref,
IKA = 10 mA
2
VKA = Vref, IKA = 10 mA,
TA = −40°C to 125°C
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
∆VKA = 10 V − Vref
∆VKA = 36 V − 10 V
Reference current
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞,
TA = −40°C to 125°C
Minimum cathode current
for regulation
2
VKA = Vref
Off-state cathode current
Dynamic impedance (see Figure 1)
4
VKA = 36 V,
Vref = 0
2
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
TL431AQ, TL432AQ
MIN TYP MAX
2470 2495 2520
UNIT
mV
14
34 mV
−1.4 −2.7 _mV
−1
−2 V
2
4 µA
0.8 2.5 µA
0.4 0.7 mA
0.1 0.5 µA
0.2 0.5 Ω
electrical characteristics over recommended operating conditions, T_A = 25°C (unless otherwise
noted)
Vref
VI(dev)
DV_ref
DV_KA
Iref
II(dev)
Imin
Ioff
|zKA|
PARAMETER
TEST
CIRCUIT
TEST CONDITIONS
Reference voltage
Deviation of reference voltage
over full temperature range
(see Figure 1)
2
VKA = Vref,
IKA = 10 mA
2
VKA = Vref, IKA = 10 mA,
TA = 0°C to 70°C
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
∆VKA = 10 V − Vref
∆VKA = 36 V − 10 V
Reference current
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞,
TA = 0°C to 70°C
Minimum cathode current
for regulation
2
VKA = Vref
Off-state cathode current
Dynamic impedance (see Figure 1)
4
VKA = 36 V,
Vref = 0
1
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
TL431BC, TL432BC
MIN TYP MAX
2483 2495 2507
UNIT
mV
6
16 mV
−1.4 −2.7 _mV
−1
−2 V
2
4 µA
0.8 1.2 µA
0.4 0.6 mA
0.1 0.5 µA
0.2 0.5 Ω
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