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| TL431 Datasheet, PDF (6/23 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES | |||
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NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
11. Thermal characteristics
Table 9.
Symbol
Rth(j-a)
Thermal characteristics
Parameter
thermal resistance from
junction to ambient
Conditions
in free air
Rth(j-sp)
thermal resistance from
junction to solder point
Min Typ Max Unit
[1] -
-
360 K/W
[2] -
-
216 K/W
[3] -
-
132 K/W
[4] -
-
50
K/W
[1] Device mounted on an FR4 PCB, single-sided copper, tin-plated and standard footprint.
[2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for collector 1 cm2.
[3] Device mounted on a ceramic PCB, Al2O3, standard footprint.
[4] Soldering point at pin 3.
12. Characteristics
Table 10. Characteristics
Symbol Parameter
Conditions
Min
Typ
Standard-Grade (2 %): TL431CDBZR; TL431IDBZR; TL431QDBZR; TL431SDT; TL431MSDT
Vref
ÎVref
reference voltage
reference voltage variation
TL431CDBZR
TL431IDBZR
TL431QDBZR
TL431SDT
TL431MSDT
VKA = Vref; IK = 10 mA
VKA = Vref; IK = 10 mA
Tamb = 0 °C to 70 °C
Tamb = â40 °C to 85 °C
Tamb = â40 °C to 125 °C
2440
-
-
2495
6
14
ÎVref/ÎVKA reference voltage variation
to cathode-anode voltage
variation ratio
IK = 10 mA
ÎVKA = 10 V to Vref
ÎVKA = 36 V to 10 V
-
â1.4
-
â1
Iref
reference current
IK = 10 mA;
-
2
R1 = 10 kΩ; R2 = open
ÎIref
reference current variation IK = 10 mA;
R1 = 10 kΩ; R2 = open
TL431CDBZR
TL431IDBZR
TL431QDBZR
TL431SDT
TL431MSDT
Tamb = 0 °C to 70 °C
-
0.4
Tamb = â40 °C to 85 °C
-
0.8
Tamb = â40 °C to 125 °C
IK(min)
Ioff
ZKA
minimum cathode current
off-state current
dynamic cathode-anode
impedance
VKA = Vref
VKA = 36 V; Vref = 0
IK = 1 mA to 100 mA;
VKA = Vref; f < 1 kHz
-
0.4
-
0.1
-
0.2
Max
2550
16
34
â2.7
â2
4
1.2
2.5
1
1
0.5
Unit
mV
mV
mV
mV/V
mV/V
μA
μA
μA
mA
μA
Ω
TL431_FAM_2
Product data sheet
Rev. 02 â 20 January 2010
© NXP B.V. 2010. All rights reserved.
6 of 23
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