SNVSBA4A May 2019 – November 2019 TL431LI-Q1 , TL432LI-Q1
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parameter Measurement Information
- 9 Detailed Description
-
10Applications and Implementation
- 10.1 Application Information
- 10.2 Typical Applications
- 10.3 System Examples
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
- DBZ|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information
10.3 System Examples
R should provide cathode current ≥0.6 mA to the TL431LI-Q1 at minimum V(BATT).
Figure 27. Precision High-Current Series Regulator 
Figure 28. Output Control of a Three-Terminal Fixed Regulator 
Figure 29. High-Current Shunt Regulator 
Refer to the stability boundary conditions in Figure 12 to determine allowable values for C.
Figure 30. Crowbar Circuit 
Figure 31. Precision 5-V, 1.5-A Regulator 
Rb should provide cathode current ≥0.6 mA to the TL431LI-Q1.
Figure 32. Efficient 5-V Low-Dropout (LDO) Regulator Configuration 
Figure 33. PWM Converter With Reference 
Select R3 and R4 to provide the desired LED intensity and cathode current ≥0.6 mA to the TL431LI-Q1 at the available VI(BATT).
Figure 34. Voltage Monitor 
Figure 35. Delay Timer 
Figure 36. Precision Current Limiter 
Figure 37. Precision Constant-Current Sink