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NCV431ASNT1G

Low Voltage Precision Adjustable Shunt Regulator

ON Semiconductor 

TL431, A, B Series, NCV431A

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

TL431AI / NCV431AI

TL431AC

TL431BI / TL431BV

Characteristic

Symbol Min Typ Max Min Typ Max Min Typ Max Unit

Reference Input Voltage (Figure 1)

VKA = Vref, IK = 10 mA

TA = 25°C

TA = Tlow to Thigh

Reference Input Voltage Deviation Over

Temperature Range (Figure 1, Notes 4, 5)

VKA= Vref, IK = 10 mA

Ratio of Change in Reference Input Voltage to

Change in Cathode to Anode Voltage

IK = 10 mA (Figure 2),

DVKA = 10 V to Vref

DVKA = 36 V to 10 V

Reference Input Current (Figure 2)

IK = 10 mA, R1 = 10 k, R2 = ∞

TA = 25°C

TA = Tlow to Thigh (Note 4)

Reference Input Current Deviation Over

Temperature Range (Figure 2, Note 4)

IK = 10 mA, R1 = 10 k, R2 = ∞

Minimum Cathode Current For Regulation

VKA = Vref (Figure 1)

Vref

DVref

V

2.47 2.495 2.52 2.47 2.495 2.52 2.483 2.495 2.507

2.44 − 2.55 2.453 − 2.537 2.475 2.495 2.515

− 7.0 30

− 3.0 17

−

3.0 17 mV

DVref

mV/V

DVKA

− −1.4 −2.7 − −1.4 −2.7 − −1.4 −2.7

− −1.0 −2.0 − −1.0 −2.0 − −1.0 −2.0

Iref

mA

−

1.8 4.0

−

1.8 4.0

−

1.1 2.0

−

− 6.5 −

−

5.2

−

− 4.0

DIref

− 0.8 2.5 − 0.4 1.2

−

0.8 2.5 mA

Imin

−

0.5 1.0

−

0.5 1.0

−

0.5 1.0 mA

Off−State Cathode Current (Figure 3)

VKA = 36 V, Vref = 0 V

Dynamic Impedance (Figure 1, Note 6)

VKA = Vref, DIK = 1.0 mA to 100 mA

f ≤ 1.0 kHz

Ioff

|ZKA|

−

20 1000 −

20 1000 − 0.23 500 nA

− 0.22 0.5

− 0.22 0.5

− 0.14 0.3 W

4. Tlow = −40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431BV, TL431AIDM, TL431IDM,

TL431BIDM, NCV431AIDMR2, NCV431AIDR2

= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,

TL431ACDM, TL431BCDM

Thigh = +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM

= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM,

TL431BCDM

= +125°C TL431BV, NCV431AIDMR2, NCV431AIDR2

5. The deviation parameter DVref is defined as the difference between the maximum and minimum values obtained over the full operating

ambient temperature range that applies.

Vref max

Vref min

DVref = Vref max

−Vref min

DTA = T2 − T1

T1

T2

Ambient Temperature

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

ǒ Ǔ Vref

ppm

_C

+

D Vref

Vref @ 25_C

D TA

X 106

+

D Vref x 106

D TA (Vref @ 25_C)

aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)

Example : DVref + 8.0 mV and slope is positive,

Vref @ 25_C + 2.495 V, DTA + 70_C

a

Vref

+

0.008 x 106

70 (2.495)

+

45.8

ppmń_C

6.

The

dynamic

impedance

ZKA

is

defined

as

|ZKA|

+

D VKA

D IK

When

the

device

is

programmed

with

two

external

resistors,

R1

and

R2,

(refer

ǒ Ǔ to Figure 2) the total dynamic impedance of the circuit is defined as: |ZKAȀ| [ |ZKA|

1

)

R1

R2

7. NCV431AIDMR2, NCV431AIDR2 Tlow = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications

requiring site and change control.

http://onsemi.com

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