Datasheet

TL431−Q1

ADJUSTABLE PRECISION SHUNT REGULATOR

SGLS302D − MARCH 2005 − REVISED MARCH 2013

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Table 1. Graphs

FIGURE

Reference voltage vs Free-air temperature 5

Reference current vs Free-air temperature 6

Cathode current vs Cathode voltage 7, 8

OFF-state cathode current vs Free-air temperature 9

Ratio of delta reference voltage to delta cathode voltage vs Free-air temperature 10

Equivalent input noise voltage vs Frequency 11

Equivalent input noise voltage over a 10-s period 12

Small-signal voltage amplification vs Frequency 13

Reference impedance vs Frequency 14

Pulse response 15

Stability boundary conditions 16

Table 2. Application Circuits

FIGURE

Shunt regulator 17

Single-supply comparator with temperature-compensated threshold 18

Precision high-current series regulator 19

Output control of a three-terminal fixed regulator 20

High-current shunt regulator 21

Crowbar circuit 22

Precision 5-V 1.5-A regulator 23

Efficient 5-V precision regulator 24

PWM converter with reference 25

Voltage monitor 26

Delay timer 27

Precision current limiter 28

Precision constant-current sink 29