Philips Semiconductors
Product specification
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
Adjustable precision shunt regulators
DC ELECTRICAL CHARACTERISTICS
25°C free-air temperature, unless otherwise stated.
LIMITS
TEST
TL431AC
TYP MAX
2470 2495 2520 2440 2495 2550
TL431C/LM431AC
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
CKT
Fig. 3
Fig. 3
MIN
MIN TYP MAX
V
REF
Reference input voltage
V
V
= V
= V
, I = 10mA
REF K
mV
mV
KA
Deviation of reference input
voltage over full
, I = 10mA,
KA
REF
K
V
4
15
4
17
REF(dev)
2
T
amb
= full range
3
temperature range
Ratio of change in reference
input voltage to the change
in cathode voltage
∆V = 10V – V
–1.4
–2.7
–1.4
–2.7
KA
REF
DVREF
DVKA
Fig. 4
Fig. 4
Fig. 4
I
= 10mA
mV/V
µA
K
∆V = 36V – 10V
–1
2
–2
4
–1
2
–2
4
KA
I
Reference input current
I
I
= 10mA, R = 10kΩ, R = ∞
1 2
REF
K
Deviation of reference input
current over full temperature
= 10mA, R = 10kΩ, R = ∞,
K
1
2
I
0.8
1.2
0.4
1.2
µA
REF(dev)
2
T
= full range
3
amb
range
Minimum cathode current
for regulation
I
Fig. 3
Fig. 5
Fig. 3
V
= V
REF
0.4
0.1
0.2
0.6
0.5
0.5
0.4
0.1
0.2
1
1
mA
µA
Ω
MIN
KA
I
Off-state cathode current
V
V
= 36V, V
= 0
REF
OFF
KA
= V , I = 1mA to 100mA,
KA
REF
K
4
| Z
|
Dynamic impedance
0.5
KA
f ≤ 1kHz
25°C free-air temperature, unless otherwise stated.
LIMITS
TEST
TL431AI
TL431I
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
CKT
Fig. 3
Fig. 3
MIN
TYP MAX
MIN
TYP MAX
V
REF
Reference input voltage
V
V
= V
= V
, I = 10mA
REF K
2470 2495 2520 2440 2495 2550
mV
mV
KA
Deviation of reference input
voltage over full
, I = 10mA,
KA
REF
K
V
5
25
5
30
REF(dev)
2
T
amb
= full range
3
temperature range
Ratio of change in reference
input voltage to the change
in cathode voltage
∆V = 10V – V
–1.4
–2.7
–1.4
–2.7
KA
REF
DVREF
DVKA
Fig. 4
Fig. 4
Fig. 4
I
= 10mA
mV/V
µA
K
∆V = 36V – 10V
–1
2
–2
4
–1
2
–2
4
KA
I
Reference input current
I
I
= 10mA, R = 10kΩ, R = ∞
1 2
REF
K
Deviation of reference input
current over full temperature
= 10mA, R = 10kΩ, R = ∞,
K
1
2
I
0.8
2.5
0.8
2.5
µA
REF(dev)
2
T
= full range
3
amb
range
Minimum cathode current
for regulation
I
Fig. 3
Fig. 5
Fig. 3
V
= V
REF
0.4
0.1
0.2
0.7
0.5
0.5
0.4
0.1
0.2
1
1
µA
µA
Ω
MIN
KA
I
Off-state cathode current
V
V
= 36V, V
= 0
REF
OFF
KA
= V , I = 1mA to 100mA,
KA
REF
K
4
| Z
|
Dynamic impedance
0.5
KA
f ≤ 1kHz
NOTES:
2. Full temperature range is –40°C to +85°C for the TL431I and TL431AI, and 0°C to +70°C for the TL431C and TL431AC.
3. The deviation parameters V and I are defined as the differences between the maximum and minimum values obtained over
REF(dev)
REF(dev)
the rated termperature range. The average full-range temperature coefficient of the reference input voltage, αV
, is defined as:
REF
V
Max V
REF
REF(dev)
6
ǒ
Ǔ@ 10
o
V
at 25
C
REF
ppm
V
| ǒ Ǔ +
degC
| aVREF
REF(dev)
DTamb
Min V
REF
∆T
amb
where ∆T
is the rated operating free-air temperature range of the device.
amb
4
1997 Feb 25