TL431Z Datasheet, PDF (11/15 Pages) List of Unclassifed Manufacturers – PROGRAMMABLE PRECISION SHUNT REGULATOR

PROGRAMMABLE PRECISION SHUNT REGULATOR TL431Z/AZ /CZ
APPLICATION INFORMATION
V_I(BATT)
R
(SEE NOTE A)
V_REF
R1
0.1%
R2
0.1%
V_O
TL431
V_O =（1+
R1
R2
）^VREF
RETURN
NOTE A : R Should provide cathode current≥1㎃ to the TL431 at minimum V_I(BATT)
Figure 15. Shunt Regulator
V_I(BATT)
TL431
INPUT
V_{IT ~~ 2.5V}
V_O
V_{ON ~~ 2.5V}
V_{OFF ~~ VI(BATT)}
GND
Figure 16. Single-Supply Comparator With Temperature-Compensated Threshold
V_I(BATT)
TL431
R
(SEE NOTE A)
2N222
30Ω
0.01㎌
R2
0.1%
R1
0.1%
4.7㏀
2N222
V_O =（1+
R1
R2
）^VREF
V_O
NOTE A : R Should provide cathode current≥1㎃ to the TL431 at minimum V_I(BATT)
Figure 17. Precision High-Current Series Regulator
Jan. 2007 - Rev 1.0
11
HTC