TL431C Datasheet, PDF (4/16 Pages) NXP Semiconductors – Adjustable precision shunt regulators

Philips Semiconductors
Adjustable precision shunt regulators
Product specification
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
DC ELECTRICAL CHARACTERISTICS
25°C free-air temperature, unless otherwise stated.
SYMBOL
PARAMETER
TEST
CKT
TEST CONDITIONS
V_REF
V_REF(dev)
Reference input voltage
Deviation of reference input
voltage over full
temperature range³
Fig. 3 V_KA = V_REF, I_K = 10mA
Fig. 3
V_KA = V_REF, I_K = 10mA,
T_amb = full range²
LIMITS
TL431AC
TL431C/LM431AC
MIN TYP MAX MIN TYP MAX
2470 2495 2520 2440 2495 2550
UNIT
mV
4
15
4
17 mV
DV_REF
DV_KA
I_REF
I_REF(dev)
Ratio of change in reference
input voltage to the change
in cathode voltage
Reference input current
Deviation of reference input
current over full temperature
range³
Fig. 4
Fig. 4
∆V_KA = 10V – V_REF
I_K = 10mA
∆V_KA = 36V – 10V
I_K = 10mA, R₁ = 10kΩ, R₂ = ∞
Fig. 4
I_K = 10mA, R₁ = 10kΩ, R₂ = ∞,
T_amb = full range²
–1.4 –2.7
–1 –2
2
4
0.8 1.2
–1.4 –2.7
mV/V
–1 –2
2
4
µA
0.4 1.2 µA
I_MIN
I_OFF
| Z_KA |
Minimum cathode current
for regulation
Off-state cathode current
Dynamic impedance⁴
Fig. 3 V_KA = V_REF
Fig. 5
Fig. 3
V_KA = 36V, V_REF = 0
V_KA = V_REF, I_K = 1mA to 100mA,
f ≤ 1kHz
0.4 0.6
0.1 0.5
0.2 0.5
0.4
1
mA
0.1
1
µA
0.2 0.5
Ω
25°C free-air temperature, unless otherwise stated.
SYMBOL
PARAMETER
TEST
CKT
TEST CONDITIONS
V_REF
V_REF(dev)
Reference input voltage
Deviation of reference input
voltage over full
temperature range³
Fig. 3 V_KA = V_REF, I_K = 10mA
Fig. 3
V_KA = V_REF, I_K = 10mA,
T_amb = full range²
LIMITS
TL431AI
TL431I
MIN TYP MAX MIN TYP MAX
2470 2495 2520 2440 2495 2550
UNIT
mV
5
25
5
30 mV
DV_REF
DV_KA
I_REF
I_REF(dev)
Ratio of change in reference
input voltage to the change
in cathode voltage
Reference input current
Deviation of reference input
current over full temperature
range³
Fig. 4
Fig. 4
∆V_KA = 10V – V_REF
I_K = 10mA
∆V_KA = 36V – 10V
I_K = 10mA, R₁ = 10kΩ, R₂ = ∞
Fig. 4
I_K = 10mA, R₁ = 10kΩ, R₂ = ∞,
T_amb = full range²
–1.4 –2.7
–1 –2
2
4
0.8 2.5
–1.4 –2.7
mV/V
–1 –2
2
4
µA
0.8 2.5 µA
I_MIN
I_OFF
| Z_KA |
Minimum cathode current
for regulation
Off-state cathode current
Dynamic impedance⁴
Fig. 3 V_KA = V_REF
Fig. 5
Fig. 3
V_KA = 36V, V_REF = 0
V_KA = V_REF, I_K = 1mA to 100mA,
f ≤ 1kHz
0.4 0.7
0.1 0.5
0.2 0.5
0.4
1
µA
0.1
1
µA
0.2 0.5
Ω
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:
ǒ Ǔ _ppm
VREF(dev)
VREF at 25oC
@ 10⁶
ǒ Ǔ | aV_REF | _{deg C} +
DT_amb
Max V_REF
V_REF(dev)
Min V_REF
∆T_amb
where ∆T_amb is the rated operating free-air temperature range of the device.
1997 Feb 25
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