TL431B Datasheet, PDF (14/40 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)
Ratio of change in reference voltage
to the change in cathode voltage
Reference current
Deviation of reference current
over full temperature range
(see Figure 1)
Minimum cathode current
for regulation
2
VKA = Vref,
IKA = 10 mA
2
VKA = Vref, IKA = 10 mA,
TA = −40°C to 85°C
3
IKA = 10 mA
∆VKA = 10 V − Vref
∆VKA = 36 V − 10 V
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞,
TA = −40°C to 85°C
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
TL431BI, TL432BI
MIN TYP MAX
2483 2495 2507
14
34
−1.4 −2.7
−1
−2
2
4
0.8 2.5
0.4 0.7
0.1 0.5
0.2 0.5
UNIT
mV
mV
mV
V
µA
µA
mA
µA
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 = −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
1
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
TL431BQ, TL432BQ
MIN TYP MAX
2483 2495 2507
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
14
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