Philips Semiconductors
Product specification
Adjustable precision shunt regulators
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
V ref – REFERENCE INPUT VOLTAGE – (mV)
2600
2580
2560
2540
2520
2500
2480
2460
2440
2420
2400
–50
–25
0
25
50
75
100
125
V
ref
= 2440mV
V
ref
= 2495mV
V
ref
= 2550mV
Iref – REFERENCE INPUT CURRENT – (
µ
A)
V
KA
= V
ref
I
K
= 10mA
3.0
2.5
2.0
1.5
1.0
0.5
0
–75
R1 = 10kΩ
R2 =
∞
I
K
= 10mA
–50
T
amb
– TEMPERATURE – (°C)
–25
0
25
50
75
T
amb
– TEMPERATURE – (°C)
100
125
SL01170
SL01168
Figure 6. Reference Input Voltage vs. Temperature
Figure 9. Reference Input Current vs. Temperature
150
125
CATHODE CURRENT – (mA)
100
75
50
25
0
–25
–50
–75
–100
–2
–1
0
1
2
3
CATHODE VOLTAGE – (V)
V
KA
= V
ref
T
amb
= 25°C
Ioff – OFF-STATE CATHODE CURRENT – (nA)
90
80
70
60
50
40
30
20
10
0
–75
–50
–25
0
25
50
75
100
125
V
KA
= 36V
V
ref
= 0V
T
amb
– TEMPERATURE – (°C)
SL01171
SL01169
Figure 7. Cathode Current vs. Cathode Voltage
Figure 10. Off-State Cathode Current vs. Temperature
800
I K – CATHODE CURRENT – (
µ
A)
V
KA
= V
ref
T
amb
= 25°C
600
d(Vref)/d(Vka) – (mV/V)
I
min
400
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
V
KA
= 3V TO 36V
200
0
–200
–1
0
1
2
3
V
KA
– CATHODE VOLTAGE – (V)
–1
–75
–50
–25
0
25
50
75
100
125
T
amb
– TEMPERATURE – (°C)
SL01172
SL01173
Figure 8. Cathode Current vs. Cathode Voltage
Figure 11. Ratio of Delta Reference Voltage to
Delta Cathode Voltage over Temperature
1997 Feb 25
6
PHILIPS [ NXP SEMICONDUCTORS ]
