TL431M3 Datasheet, PDF (2/6 Pages) Cystech Electonics Corp. – Adjustable Precision Shunt Regulators

CYStech Electronics Corp.
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 200712.24
Page No. : 2/6
Functional Block Diagram & Symbol
Functional Block Diagram :
Cathode
Reference
+
-
VREF
Anode
Symbol :
Cathode
Reference
Anode
Test Circuits
II
II
IN
VZ
IN
VZ
IN
VZ
IREF
IZ
VREF
R1 _IREF
IZ
R2 ^VREF
Fig1. Test Circuit for VZ=VREF
Fig 2. Test Circuit for VZ>VREF
Fig3. Test Circuit for Off-State
Note : VZ=VREF(1+R1/R2)+IREFxR1
Current
Electrical Characteristics ( Ta=25°C unless otherwise specified )
Characteristics
Symbol Test Conditions Min Typ Max Unit
Reference Input Voltage TL431A
2.483 2.495 2.507
TL431B
V_REF V_KA=V_REF, I_K=10mA 2.470 2.495 2.520 V
TL431C
2.445 2.495 2.545
Deviation of Reference Input Voltage
Over-Temperature (Note)
V_REF(dev)
V_KA=V_REF, I_K=10mA
T_min≤T_a≤T_max
-
4.5 17 mV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
ΔV_REF /
ΔV_KA
I_K=10mA,
ΔV_KA=10V~V_REF
I_K=10mA,
ΔK_KA=36V~10V
- -1.0 -2.7 _mV/
- -0.5 -2.0 ^V
Reference Input Current
I_REF
I_K=10mA, R₁=10kΩ,
R₂=∞
-
1.5
4 μA
Deviation of Reference Input Current
Over Full Temperature Range
I_REF(dev)
I_K=10mA, R₁=10kΩ,
R₂=∞, T_a=Full Range
-
0.4 1.2 μA
Minimum Cathode Current for
Regulation
I_K(min) V_KA=V_REF
- 0.45 1.0 mA
Off-State Cathode Current
I_K(off) V_KA=36V, V_REF=0
- 0.05 1.0 μA
Dynamic impedance
Note : Tmin=0℃, Tmax=70℃
|ZKA|
V_KA=V_REF, f≤1.0KHz
I_K=1 to 100mA
-
0.15 0.5 Ω
TL431M3
CYStek Product Specification