TLV431 datasheet(4/19 Pages) ONSEMI

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TLV431, NCV431, SCV431

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ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)

Characteristic

Symbol

TLV431C

Unit

Min

Typ

Max

Reference Voltage (Figure 3)

(VKA = Vref, IK = 10 mA, TA = 25°C)

(TA = Tlow to Thigh, Note 5)

Vref

1.237

1.228

1.240

−

1.243

1.252

Reference Input Voltage Deviation Over Temperature (Figure 3)

(VKA = Vref, IK = 10 mA, TA = Tlow to Thigh, Notes 5, 6, 7)

DVref

−

7.2

Ration of Reference Input Voltage Change to Cathode Voltage Change (Figure 4)

(VKA = Vref to 16 V, IK = 10 mA)

DVref

DVKA

−

−0.6

−1.5

Reference Terminal Current (Figure 4)

(IK = 10 mA, R1 = 10 kW, R2 = open)

Iref

−

0.15

0.3

Reference Input Current Deviation Over Temperature (Figure 4)

(IK = 10 mA, R1 = 10 kW, R2 = open, Notes 5, 6, 7)

DIref

−

0.04

0.08

Minimum Cathode Current for Regulation (Figure 3)

IK(min)

−

Off−State Cathode Current (Figure 5)

(VKA = 6.0 V, Vref = 0)

(VKA = 16 V, Vref = 0)

IK(off)

−

0.01

0.012

0.04

0.05

Dynamic Impedance (Figure 3)

(VKA = Vref, IK = 0.1 mA to 20 mA, f ≤ 1.0 kHz, Note 8)

|ZKA|

−

0.25

0.4

5. Ambient temperature range: Tlow = *40°C, Thigh = 85°C.

6. Guaranteed but not tested.

7. The deviation parameters DVref and DIref are defined as the difference between the maximum value and minimum value obtained over the

full operating ambient temperature range that applied.

Vref Max

Vref Min

Ambient Temperature

DVref = Vref Max − Vref Min

DTA = T2 − T1

The average temperature coefficient of the reference input voltage, aVref is defined as:

αVref

ppm

°C +

(DVref)

Vref (TA+ 25°C)

106

DTA

aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature, refer to Figure 8.

Example: DVref = 7.2 mV and the slope is positive,

Example: Vref @ 25°C = 1.241 V

Example: DTA = 125°C

αVref

ppm

°C +

0.0072

1.241

125

+ 46 ppm °C

106

8. The dynamic impedance ZKA is defined as:

⏐ZKA⏐ +

DVKA

DIK

When the device is operating with two external resistors, R1 and R2, (refer to Figure 4) the total dynamic impedance of the circuit is given by:

⏐ZKA′⏐ + ⏐ZKA⏐

1 ) R1

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