TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
electrical characteristics over recommended operating conditions, T
A
= 25°C (unless otherwise
noted)
PARAMETER
Vref
VI(dev)
Reference voltage
Deviation of reference voltage
over full temperature range
(see Figure 1)
Ratio of change in reference voltage
g
g
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
Dynamic impedance (see Figure 1)
TEST
CIRCUIT
2
2
TEST CONDITIONS
VKA = Vref,
IKA = 10 mA
TL431I
MIN
2440
TYP
2495
5
–1.4
–1
2
0.8
MAX
2550
50
–2.7
–2
4
2.5
UNIT
mV
mV
VKA = Vref, IKA = 10 mA,
TA = full range†
IKA = 10 mA
∆V
KA = 10 V – Vref
∆V
KA = 36 V – 10 V
D
V
ref
D
V
KA
Iref
II(dev)
Imin
Ioff
|zKA|
3
3
3
mV
V
µA
µA
IKA = 10 mA, R1 = 10 kΩ, R2 =
∞
IKA = 10 mA, R1 = 10 kΩ, R2 =
∞,
TA = full range†
VKA = Vref
VKA = 36 V,
Vref = 0
IKA = 1 mA to 100 mA, VKA = Vref,
f
≤
1 kHz
2
4
2
0.4
0.1
0.2
1
1
0.5
mA
µA
Ω
† Full range is –40°C to 85°C for the TL431I.
electrical characteristics over recommended operating conditions, T
A
= 25°C (unless otherwise
noted)
PARAMETER
Vref
VI(dev)
Reference voltage
Deviation of reference voltage
over full temperature range
(see Figure 1)
Ratio of change in reference voltage
g
g
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
Dynamic impedance (see Figure 1)
TEST
CIRCUIT
2
2
TEST CONDITIONS
VKA = Vref,
IKA = 10 mA
TL431AC
MIN
2470
TYP
2495
4
–1.4
–1
2
0.8
MAX
2520
25
–2.7
–2
4
1.2
UNIT
mV
mV
VKA = Vref, IKA = 10 mA,
TA = full range†
IKA = 10 mA
∆V
KA = 10 V – Vref
∆V
KA = 36 V – 10 V
D
V
ref
D
V
KA
Iref
II(dev)
Imin
Ioff
|zKA|
3
3
3
mV
V
µA
µA
IKA = 10 mA, R1 = 10 kΩ, R2 =
∞
IKA = 10 mA, R1 = 10 kΩ, R2 =
∞,
TA = full range‡
VKA = Vref
VKA = 36 V,
Vref = 0
IKA = 1 mA to 100 mA, VKA = Vref,
f
≤
1 kHz
2
4
1
0.4
0.1
0.2
0.6
0.5
0.5
mA
µA
Ω
‡ Full range is 0°C to 70°C for the TL431AC.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
5
TI [ TEXAS INSTRUMENTS ]
