TL431 LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 4 of 7
www.unisonic.com.tw QW-R103-003,AC
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER SYMBOL RATINGS UNIT
Cathode Voltage VKA 37 V
Cathode Current Range(Continuous) IKA -100 ~ +150 mA
Reference Input Current Range IREF -0.05 ~ +10 mA
TO-92 770 mW
SOT-89 800 mW
Power Dissipation
SOT-23/SOT-23-3/SOT-25
PD
300 mW
Operating Junction TJ +150 °C
Operating Ambient TOPR -40 ~ +85 °C
Storage Temperature TSTG -65 ~ +150 °C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL MIN TYP MAX UNIT
Cathode Voltage VKA V
REF 36 V
Cathode Current IKA 1 100 mA
ELECTRICAL CHARACTERISTICS (TC= 25°C, unless otherwise specified.)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
TL431-A 2.483 2.495 2.507 V
TL431-1 2.470 2.495 2.520 V
TL431-2 2.520 - 2.545 V
Reference Input Voltage VREF V
KA=VREF,IKA=10mA
TL431-3 2.445 - 2.470 V
Deviation of reference Input Voltage Over
temperature ΔT
ΔVREF VKA=VREF,IKA=10mA
0°C ≤Ta≤70°C 4.5 17 mV
ΔVKA=10V~VREF -1.0 -2.7 mV/VRatio of Change in Reference Input
Voltage to the Change in Cathode Voltage KA
REF
ΔV
ΔVIKA=10mA ΔVKA=36V~10V -0.5 -2.0 mV/V
Reference Input Current IREF I
KA=10mA, R1=10kΩ, R2=∞ 1.5 4 µA
Deviation of Reference Input Current Over
Full Temperature Range ΔT
ΔIREF IKA=10mA, R1=10kΩ, R2=∞
Ta =full Temperature 0.4 1.2 µA
Minimum Cathode Current for Regulation IKA(MIN) VKA=VREF 0.3 0.5 mA
Off-State Cathode Current IKA(OFF) VKA=36V, VREF=0 0.05 1.0 µA
Dynamic Impedance ZKA VKA=VREF, IKA=1 to 100mA
f≤1.0kHz 0.15 0.5 Ω