Voltage References | NCP431

Voltage Reference, Low Cathode Current, Programmable, Shunt Regulator

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Overview

The NCP431 integrated circuits are three-terminal programmable shunt regulator diodes. They are a direct upgrade to the industry standard TL431A. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 V using two external resistors. These devices exhibit a wide operating current range of 40 µA to 100 mA with a typical dynamic impedance of 0.22Ω. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the NCP431 operates as a shunt regulator, it can be used as either a positive or negative voltage reference. Low minimum operating current makes this device an ideal choise for secondary regulators in SMPS adapters with extremely low no-load consumption.

The NCP432 has exactly the same functionality and electrical specifications as the NCP431, but has an alternate pin configuration.

  • Switchmode Power Supplies
  • Instrumentation

  • Adapters
  • Flat TVs

  • Low Minimum Operating Current: 40 uA, Typ @ 25C
  • Voltage Reference Tolerance: 1%, Typ @ 25C
  • Programmable Output Voltage to 36 V
  • Low Dynamic Output Impedance, 0.22ohm Typical
  • Temperature Compensated for Operation over Full Rated Operating
    Temperature Range
  • Equivalent FullRange Temperature Coefficient of 50 ppm/C
    Typical
  • NCP431 is pin compatible to the TL432
  • NCP432 is pin compatible to the TL431

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NCP431ACDR2G

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Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Adjustable

2.5

1

0.04

0.04

36

0

70

Price N/A

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NCP431ACLPRAG

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Pb

A

H

P

TO-92

29-10

NA

0

REEL

2000

N

Adjustable

2.5

1

0.04

0.04

36

0

70

Price N/A

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NCP431ACSNT1G

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A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

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3000

Y

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2.5

1

0.04

0.04

36

0

70

$0.1057

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NCP431AIDR2G

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A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

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2.5

1

0.04

0.04

36

-40

85

Price N/A

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NCP431AILPRAG

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Pb

A

H

P

TO-92

29-10

NA

0

REEL

2000

N

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2.5

1

0.04

0.04

36

-40

85

Price N/A

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NCP431AISNT1G

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A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

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2.5

1

0.04

0.04

36

-40

85

$0.106

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NCP431AVDR2G

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Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Adjustable

2.5

1

0.04

0.04

36

-40

125

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NCP431AVLPG

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A

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P

TO-92

29-10

NA

0

BLKBG

2000

N

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2.5

1

0.04

0.04

36

-40

125

Price N/A

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NCP431AVLPRAG

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CAD Model

Pb

A

H

P

TO-92

29-10

NA

0

REEL

2000

N

Adjustable

2.5

1

0.04

0.04

36

-40

125

Price N/A

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NCP431AVSNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

Adjustable

2.5

1

0.04

0.04

36

-40

125

$0.1057

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NCP431BCSNT1G

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Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

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2.5

0.5

0.04

0.04

36

0

70

$0.0963

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NCP431BISNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

Adjustable

2.5

0.5

0.04

0.04

36

-40

85

$0.1284

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NCP431BVSNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

Adjustable

2.5

0.5

0.04

0.04

36

-40

125

$0.079

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NCP432BCSNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

N

Adjustable

2.5

0.5

0.04

0.04

36

0

70

$0.1025

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NCP432BISNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

N

Adjustable

2.5

0.5

0.04

0.04

36

-40

85

$0.1025

More Details

NCP432BVSNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

N

Adjustable

2.5

0.5

0.04

0.04

36

-40

125

$0.1056

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SC431AVSNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

Adjustable

2.5

1

0.04

0.04

36

-40

125

$0.1867

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SC431BVSNT1G

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CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

Adjustable

2.5

0.5

0.04

0.04

36

-40

125

$0.2

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SC432BVSNT1G

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Active

CAD Model

Pb

A

H

P

SOT-23 (TO-236) 2.90x1.30x1.00, 1.90P

318

1

260

REEL

3000

Y

Adjustable

2.5

0.5

0.04

0.04

36

-40

125

$0.2

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Reliability Data

Die Related Summary Data

Device: NCP431ACDR2G

Equivalent to wafer fab process: BP STD LINEAR

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

BP STD LINEAR

10

12120914040

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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