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NCP431: Voltage Reference, Low Cathode Current, Programmable, Shunt Regulator

Datasheet: Programmable Precision References
Rev. 16 (418kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
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.
Features   Benefits
     
  • Low Minimum Operating Current: 40 uA, Typ @ 25C
 
  • Reduced power consumption
  • Voltage Reference Tolerance: 1%, Typ @ 25C
  
  • Accurate Reference Voltage
  • Programmable Output Voltage to 36 V
  
  • Allows for use in a broad range of applications
  • Low Dynamic Output Impedance, 0.22ohm Typical
  
  • High and stable gain even at very low cathode current operation
  • Temperature Compensated for Operation over Full Rated Operating
    Temperature Range
  
  • Accurate and reliable operation over the temperature range
  • Equivalent FullRange Temperature Coefficient of 50 ppm/C
    Typical
  
  • Accurate reference across temperature
  • NCP431 is pin compatible to the TL432
  
  • Easily upgrade performance with no board level change
  • NCP432 is pin compatible to the TL431
  
  • Alternate pin configuration
Applications   End Products
  • Switchmode Power Supplies
  • Instrumentation
  
  • Adapters
  • Flat TVs
Technical Documentation & Design Resources
Design Notes (5) Package Drawings (3)
Simulation Models (3) Videos (2)
Data Sheets (1) Evaluation Board Documents (13)
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP12510B65GEVB Active
Pb-free
65 W notebook adapter Evaluation Board
NCP1340UHDGEVB Active
Pb-free
High-Voltage, Quasi-Resonant Controller Featuring Valley Lock-Out Switching Evaluation Board
POE-GEVB Active
Pb-free
Power over Ethernet (PoE) Shield Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP431ACDR2G Active
Pb-free
Halide free
NCP431, 0°C to 70°C SOIC-8 751-07 1 260 Tape and Reel 2500 $0.1479
NCP431ACLPRAG Active
Pb-free
Halide free
NCP431, 0°C to 70°C TO-92 29-11 NA Tape and Reel 2000 Contact Sales Office
NCP431ACSNT1G Active
Pb-free
Halide free
NCP431, 0°C to 70°C SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.0933
NCP431AIDR2G Active
Pb-free
Halide free
NCP431, −40°C to 85°C SOIC-8 751-07 1 260 Tape and Reel 2500 Contact Sales Office
NCP431AILPRAG Active
Pb-free
Halide free
NCP431, −40°C to 85°C TO-92 29-11 NA Tape and Reel 2000 $0.154
NCP431AISNT1G Active
Pb-free
Halide free
NCP431, ?40�C to 85�C SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.0933
NCP431AVDR2G Active
Pb-free
Halide free
NCP431, −40°C to 125°C SOIC-8 751-07 1 260 Tape and Reel 2500 Contact Sales Office
NCP431AVLPG Last Shipments
Pb-free
Halide free
NCP431 TO-92 29-11 NA Bulk Bag 2000  
NCP431AVLPRAG Active
Pb-free
Halide free
NCP431, −40°C to 125°C TO-92 29-11 NA Tape and Reel 2000 Contact Sales Office
NCP431AVSNT1G Active
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.0933
NCP431BCSNT1G Active
Pb-free
Halide free
NCP431, 0°C to 70°C SOT-23-3 318-08 1 260 Tape and Reel 3000 Contact Sales Office
NCP431BISNT1G Active
Pb-free
Halide free
NCP431, −40°C to 85°C SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.104
NCP431BVSNT1G Active
Pb-free
Halide free
NCP431, −40°C to 125°C SOT-23-3 318-08 1 260 Tape and Reel 3000 Contact Sales Office
NCP432BCSNT1G Active
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.0885
NCP432BISNT1G Active
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.1067
NCP432BVSNT1G Active
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.1067
SC431AVSNT1G Active
AEC Qualified
PPAP Capable
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.1867
SC431BVSNT1G Active
AEC Qualified
PPAP Capable
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.2
SC432BVSNT1G Active
AEC Qualified
PPAP Capable
Pb-free
Halide free
NCP431 SOT-23-3 318-08 1 260 Tape and Reel 3000 $0.2
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 20,000
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 34,000
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 22,500
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 14,000
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 10,000
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 4,000
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
FutureElectronics   (2020-08-19 00:00) : >1K
Avnet   (2020-08-19 00:00) : >10K
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 33,000
Market Leadtime (weeks) : 4 to 8
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 51,000
Market Leadtime (weeks) : Contact Factory
Avnet   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
FutureElectronics   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : 8 to 12
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
Type
V(BR) Typ (V)
Tolerance (%)
IQ Typ (mA)
IR Min (mA)
VF Max (V)
TA Min (°C)
TA Max (°C)
Package Type
NCP431ACDR2G  
 NCP431, 0°C to 70°C 
 $0.1479 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
0
70
SOIC-8
NCP431ACLPRAG  
 NCP431, 0°C to 70°C 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
0
70
TO-92
NCP431ACSNT1G  
 NCP431, 0°C to 70°C 
 $0.0933 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
0
70
SOT-23-3
NCP431AIDR2G  
 NCP431, −40°C to 85°C 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
85
SOIC-8
NCP431AILPRAG  
 NCP431, −40°C to 85°C 
 $0.154 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
85
TO-92
NCP431AISNT1G  
 NCP431, ?40�C to 85�C 
 $0.0933 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
85
SOT-23-3
NCP431AVDR2G  
 NCP431, −40°C to 125°C 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
125
SOIC-8
NCP431AVLPRAG  
 NCP431, −40°C to 125°C 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
125
TO-92
NCP431AVSNT1G  
 NCP431 
 $0.0933 
Pb
H
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
125
SOT-23-3
NCP431BCSNT1G  
 NCP431, 0°C to 70°C 
Pb
H
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
0
70
SOT-23-3
NCP431BISNT1G  
 NCP431, −40°C to 85°C 
 $0.104 
Pb
H
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
-40
85
SOT-23-3
NCP431BVSNT1G  
 NCP431, −40°C to 125°C 
Pb
H
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
NCP432BCSNT1G  
 NCP431 
 $0.0885 
Pb
H
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
0
70
SOT-23-3
NCP432BISNT1G  
 NCP431 
 $0.1067 
Pb
H
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
-40
85
SOT-23-3
NCP432BVSNT1G  
 NCP431 
 $0.1067 
Pb
H
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
SC431AVSNT1G  
 NCP431 
 $0.1867 
Pb
A
H
P
 Active   
Adjustable
2.5
1
0.04
0.04
36
-40
125
SOT-23-3
SC431BVSNT1G  
 NCP431 
 $0.2 
Pb
A
H
P
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
SC432BVSNT1G  
 NCP431 
 $0.2 
Pb
A
H
P
 Active   
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
Case Outlines
751-07    29-11    318-08   
Packages
NCP431: Voltage Reference, Low Cathode Current, Programmable, Shunt Regulator
NCP431: Voltage Reference, Low Cathode Current, Programmable, Shunt Regulator
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