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TL1431IYDT
Programmable Voltage Reference
October 2014 DocID5286 Rev 6 1/19
TL1431Programmable voltage reference
Datasheet - production data
Features Adjustable output voltage: VREF to 36 V Sink current capability: 1 to 100 mA Typical output impedance: 0.22 Ω 0.4 % and 0.25 % voltage precision Automotive temp. range - 40 °C to +125 °C
DescriptionThe TL1431 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire operating temperature range.
The output voltage may be set to any value
between 2.5 V and 36 V with two external
resistors.
The TL1431 operates with a wide current range
from 1 to 100 mA with a typical dynamic
impedance of 0.2 Ω.
Contents TL14312/19 DocID5286 Rev 6
Contents Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Parameter definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.1 Reference input voltage deviation over temperature range . . . . . . . . . . . .11
4.2 Temperature coefficient of reference input voltage . . . . . . . . . . . . . . . . . .11
4.3 Dynamic impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DocID5286 Rev 6 3/19
TL1431 Schematic diagrams
1 Schematic diagrams
Figure 1. TO92 pin connections (top view)
Figure 2. SO-8 pin connections (top view)
Figure 3. TL1431 block diagram
Absolute maximum ratings and operating conditions TL1431
4/19 DocID5286 Rev 6 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings Calculated with Tj=+150°C and Tamb=+25°C with relative Rthja depending on the package. Human body model: A 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ resistor
between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating. Machine model: A 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the
device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of connected pin combinations
while the other pins are floating. Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly
to the ground through only one pin. This is done for all pins.
Table 2. Operating conditions
DocID5286 Rev 6 5/19
TL1431 Electrical characteristics
3 Electrical characteristics
Tamb = 25 °C (unless otherwise specified).
Table 3. Electrical characteristics for TL1431C, TL1431AC See Reference input voltage deviation over temperature range in Section 4: Parameter definitions on page11. See Temperature coefficient of reference input voltage in Section 4: Parameter definitions on page11. See Dynamic impedance in Section 4: Parameter definitions on page11.
Electrical characteristics TL1431
6/19 DocID5286 Rev 6
Tamb = 25 °C (unless otherwise specified).
Table 4. Electrical characteristics for TL1431I, TL1431AI See Reference input voltage deviation over temperature range in Section 4: Parameter definitions on page11. See Temperature coefficient of reference input voltage in Section 4: Parameter definitions on page11. See Dynamic impedance in Section 4: Parameter definitions on page11.
DocID5286 Rev 6 7/19
TL1431 Electrical characteristics
Tamb = 25 °C (unless otherwise specified).
Table 5. Electrical characteristics for TL1431IY, TL1431AIY See Reference input voltage deviation over temperature range in Section 4: Parameter definitions on page11. See Temperature coefficient of reference input voltage in Section 4: Parameter definitions on page11. See Dynamic impedance in Section 4: Parameter definitions on page11.
Electrical characteristics TL1431
TL1431 Electrical characteristics
Electrical characteristics TL1431
Figure 20. Pulse response for IK = 1 mA
