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