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TL431AIYDT-TL431IYDT-TL432
Programmable Voltage Reference
December 2012 Doc ID 4467 Rev 11 1/21
TL431
TL432Programmable voltage reference
Datasheet − production data
Features Adjustable output voltage: 2.5 to 36 V Sink current capability: 1 to 100 mA Typical output impedance: 0.22 Ω 1% and 2% voltage precision Automotive temp. range - 40 °C to +125 °C
Applications Power supply Industrial Automotive
DescriptionThe TL431 and TL432 are programmable shunt
voltage references with guaranteed temperature
stability over the entire operating temperature
range. The device temperature range is extended
for the automotive version from -40 °C up to
+125 °C. The output voltage can be set to any
value between 2.5 and 36 V with two external
resistors. The TL431 and TL432 operate with a
wide current range from 1 to 100 mA with a typical
dynamic impedance of 0.22 Ω.
Contents TL431, TL4322/21 Doc ID 4467 Rev 11
Contents Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.1 Reference input voltage deviation over temperature range . . . . . . . . . . . . 7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.1 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 TO-92 ammopack and tape and reel package information . . . . . . . . . . . 13
4.3 TO-92 (bulk) package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 SOT23-3 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5 SOT23-5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.6 SOT323-6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TL431, TL432 Schematic diagrams
Doc ID 4467 Rev 11 3/21
1 Schematic diagrams
Figure 1. TO-92 pin connections (top view)
Figure 2. SO-8 batwing pin connections (top view)
Figure 3. SOT23-5 and SOT23-3 pin connections (top view)
Figure 4. SOT323-6 pin connections (top view)
Figure 5. TL431 and TL432 block diagram
Absolute maximum ratings and operating conditions TL431, TL432
4/21 Doc ID 4467 Rev 11 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings Short-circuits can cause excessive heating. These values are typical. 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
TL431, TL432 Electrical characteristics
Doc ID 4467 Rev 11 5/21
3 Electrical characteristics
Table 3. TL431C (Tamb = 25° C unless otherwise specified) See definition of Section 3.1: Reference input voltage deviation over temperature range. The dynamic impedance is defined as |ZKA| = KAkΔ----------------
