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V
ref
Input
V
KA
I
KA
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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.
TL1431
,
TL1431M
SLVS062N –DECEMBER 1991–REVISED OCTOBER 2016
TL1431 Precision Programmable Reference
1
1 Features
1
• 0.4% Initial Voltage Tolerance
• 0.2-Ω Typical Output Impedance
• Fast Turnon (500 ns)
• Sink Current Capability (1 mA to 100 mA)
• Low Reference Current (REF)
• Adjustable Output Voltage (V
I(ref)
to 36 V)
2 Applications
• Adjustable Voltage and Current Referencing
• Secondary Side Regulation in Flyback SMPSs
• Zener Replacement
• Voltage Monitoring
• Comparator With Integrated Reference
3 Description
The TL1431 device is a precision programmable
reference with specified thermal stability over
automotive, commercial, and military temperature
ranges. The output voltage can be set to any value
between V
I(ref)
(approximately 2.5 V) and 36 V with
two external resistors (see Figure 25). This device
has a typical output impedance of 0.2 Ω. Active
output circuitry provides a sharp turnon characteristic,
making the device an excellent replacement for Zener
diodes and other types of references in applications
such as onboard regulation, adjustable power
supplies, and switching power supplies.
The TL1431C is characterized for operation over the
commercial temperature range of 0°C to 70°C. The
TL1431Q is characterized for operation over the full
automotive temperature range of –40°C to 125°C.
The TL1431M is characterized for operation over the
full military temperature range of –55°C to 125°C.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
TL1431D SOIC (8) 3.90 mm × 4.90 mm
TL1431PW TSSOP (8) 4.40 mm × 3.00 mm
TL1431LP TO-92 (3) 4.83 mm × 3.68 mm
TL1431MJG CDIP (8) 9.58 mm x 6.67 mm
TL1431MFK LCCC (20) 8.89 mm x 8.89 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
页面指南
