The
TL431LI /TL432LI are pin-to-pin alternatives to TL431 / TL432.TL43xLI offers better
stability, lower temperature drift (VI(dev)), andlower reference
current (Iref) for improved systemaccuracy.
The TL431 and TL432 devices are three-terminal adjustable shunt
regulators, with specified thermal stability over applicable
automotive, commercial, and military temperatureranges. The output
voltage can be set to any value between Vref(approximately
2.5 V) and 36 V, with two external resistors. These devices have a
typical output impedanceof 0.2 Ω. Active output circuitry provides
a very sharp turn-on characteristic, making thesedevices excellent
replacements for Zener diodes in many applications, such as onboard
regulation,adjustable power supplies, and switching power supplies.
The TL432 device has exactly the samefunctionality and electrical
specifications as the TL431 device, but has different pinouts for
theDBV, DBZ, and PK packages.
Both the TL431 and TL432 devices are offered in three grades, with
initial tolerances (at25°C) of 0.5%, 1%, and 2%, for the B, A, and
standard grade, respectively. In addition, low outputdrift versus
temperature ensures good stability over the entire temperature
range.
The TL43xxC devices are characterized for operation from 0°C to
70°C, the TL43xxI devicesare characterized for operation from –40°C
to 85°C, and the TL43xxQ devices are characterized foroperation
from –40°C to 125°C.
Features
Reference Voltage Tolerance at 25°C
- 0.5% (BGrade)
- 1% (A Grade)
- 2% (StandardGrade)
Adjustable Output Voltage: Vref to 36 V
Operation From −40°C to 125°C
Typical Temperature Drift (TL43xB)
- 6 mV (CTemp)
- 14 mV (I Temp, Q Temp)
Low Output Noise
0.2-Ω Typical Output Impedance
Sink-Current Capability: 1 mA to 100 mA
APPLICATIONS
• Camera Phone Flash
• Handheld Computers and PDAs
• Digital Still and Video Cameras
• External Modems
• Small LCD Displays
• White LED Driver
Product Category: Power Management, Voltage Regulators, DC to DC Converters
