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TL431
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TL431A
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TL431B
TL432
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TL432A
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TL432B
SLVS543O –AUGUST 2004–REVISED JANUARY 2015
TL43xx Precision Programmable Reference
1 Features 3 Description
The TL431 and TL432 devices are three-terminal
1
• Reference Voltage Tolerance at 25°C
adjustable shunt regulators, with specified thermal
– 0.5% (B Grade)
stability over applicable automotive, commercial, and
– 1% (A Grade)
military temperature ranges. The output voltage can
be set to any value between V
ref
(approximately
– 2% (Standard Grade)
2.5 V) and 36 V, with two external resistors. These
• Adjustable Output Voltage: V
ref
to 36 V
devices have a typical output impedance of 0.2 Ω.
• Operation From −40°C to 125°C
Active output circuitry provides a very sharp turn-on
characteristic, making these devices excellent
• Typical Temperature Drift (TL431B)
replacements for Zener diodes in many applications,
– 6 mV (C Temp)
such as onboard regulation, adjustable power
– 14 mV (I Temp, Q Temp)
supplies, and switching power supplies. The TL432
• Low Output Noise
device has exactly the same functionality and
electrical specifications as the TL431 device, but has
• 0.2-Ω Typical Output Impedance
different pinouts for the DBV, DBZ, and PK packages.
• Sink-Current Capability: 1 mA to 100 mA
Both the TL431 and TL432 devices are offered in
•
three grades, with initial tolerances (at 25° C) of 0.5%,
2 Applications
1%, and 2%, for the B, A, and standard grade,
• Adjustable Voltage and Current Referencing
respectively. In addition, low output drift versus
temperature ensures good stability over the entire
• Secondary Side Regulation in Flyback SMPSs
temperature range.
• Zener Replacement
The TL43xxC devices are characterized for operation
• Voltage Monitoring
from 0°C to 70°C, the TL43xxI devices are
• Comparator with Integrated Reference
characterized for operation from –40°C to 85°C, and
the TL43xxQ devices are characterized for operation
from –40°C to 125°C.
Device Information
(1)
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
SOT-23-3 (3) 2.90 mm x 1.30 mm
SOT-23-5 (5) 2.90 mm x 1.60 mm
TL43xx SOIC (8) 4.90 mm x 3.90 mm
PDIP (8) 9.50 mm x 6.35 mm
SOP (8) 6.20 mm x 5.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.