TL431XM3 Datasheet, PDF (2/5 Pages) Cystech Electonics Corp. – Adjustable Precision Shunt Regulators

CYStech Electronics Corp.
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 2005.04.20
Page No. : 2/5
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
2.445 2.495 2.545
TL431B
V_REF V_KA=V_REF, I_K=10mA 2.470 2.495 2.520 V
TL431C
2.480 2.495 2.510
Deviation of Reference Input Voltage
Over-Temperature
V_REF(dev)
V_KA=V_REF, I_K=10mA
T_min≤T_a≤T_max
-
4 17 mV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
∆V_REF /
∆V_KA
I_K=10mA,
∆V_KA=10V-V_REF
I_K=10mA,
∆K_KA=36V-10V
- -1.4 -2.7 mV
- -1.0 -2.0 V
Reference Input Current
I_REF
I_K=10mA, R₁=10kΩ,
R₂=∞
-
2
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
- 0.4 1.0 mA
Off-State Cathode Current
I_K(off) V_KA=36V, V_REF=0
- 0.1 1.0 µA
Dynamic impedance
Z_KA
V_KA=V_REF, f≤1.0KHz
I_K=1 to 100mA
-
0.2 0.5 Ω
TL431M3
CYStek Product Specification