Features

·Programmable Output Voltage to 37 Volts
·Low Dynamic Output Impedance 0.20 Typical
·Sink Current Capability of 1.0 to 100mA
·Equivalent Full-Range Temperature Coefficient
of 50ppm/℃Typical
·Temperature Compensated For Operation Over
Full Rated Operating Temperature Range
·Low Output Noise Voltage
·Fast Turn-on Response

 

Description

The TL431 is three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 37 volts with two external resistors These devices have a typical dynamic output impedance of 0.2W Active output circuitry provides a very sharp turn-on characteristic making these devices excel lent replacement for zener diodes in many applications
 

Absolute Maximum Ratings(Operating temperature range applies unless otherwise specified.)

Parameter	Symbol	Value	Unit
Cathode Voltage	VKA	37	V
CathodeCurrent Range(Continuous)	IKA	-10～+150	mA
Power Dissipation D.LP Suffix Package P Suffix Package	PD	800	mW
StorageTemperature Range	TSTG	-55～+150	℃

 

Recommended Operating Conditions

Parameter	Symbol	Min	Typ	Max	Unit
Cathode Voltage	VKA	VREF	-	37	V
Cathode Current	IKA	1.0	-	100	mA

 

 

Electrical Characteristics(TA=+25℃,unless otherwise specified)

Parameter	Symbol	Conditions	TL431			Unit
			Min	Typ	Max
Reference Input Voltage	VREF	VKA=VREF,IKA=10mA	2.485	2.495	2.507	V
Deviation of Reference Input Voltage Over- Temperature (Note 1)	△VREF/ △T	VKA=VREF，IKA=10mA 0℃≤TA≤70℃	-		17	mV
[[iffi          Ratio of Change in                 Reference Input Voltage                 to the Change in                 Cathode Voltage	△VREF/ △VKA	△VKA=10V- IKA        VREF =10mA  △VKA=36V- 10V	-   -		-2.7   -2.0	mV/V
Reference Input Current	IREF	IKA=10mA R1=10KΩ，R2=∞	-		4	μA
Deviation of Reference Input Current Over Full TemperatureRange	△IREF/△T	IKA=10m R1=10KΩ，R2=∞ 0℃≤TA≤70℃	-		1.2	μA
Minimum Cathode Cur- Rent for Regulation	IKA（MIN）	VKA=VREF	-		1.0	mA
Off-Stage Cathode Current	IKA（OFF）	VKA=36V, VREF=0	-		0．5	μA
Dynamic Impedance	ZKA                                          ZKA	VKA=VREF IKA=1 to 100Ma f≥1.0KHZ	-		0.5	Ω