TL431B Datasheet, PDF (11/40 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)
PARAMETER
Vref Reference voltage
Deviation of reference voltage
VI(dev) over full temperature range
(see Figure 1)
DV_ref
DV_KA
Iref
II(dev)
Imin
Ioff
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
Off-state cathode current
|zKA| Dynamic impedance (see Figure 1)
TEST
CIRCUIT
TEST CONDITIONS
2
VKA = Vref,
IKA = 10 mA
VKA = Vref,
2
IKA = 10 mA,
SOT23-3 and TL432
devices
TA = −40°C to 85°C _{All other devices}
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
4
VKA = 36 V,
Vref = 0
2
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
TL431I, TL432I
MIN TYP MAX
2440 2495 2550
14
34
5
50
−1.4 −2.7
−1
−2
2
4
0.8 2.5
0.4
1
0.1
1
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
2
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
TL431Q, TL432Q
MIN TYP MAX
2440 2495 2550
UNIT
mV
14
34 mV
−1.4 −2.7 _mV
−1
−2 V
2
4 µA
0.8 2.5 µA
0.4
1 mA
0.1
1 µA
0.2 0.5 Ω
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