Product Overview

Product Overview
NCP431: Voltage Reference, Low Cathode Current, Programmable, Shunt
Regulator
For complete documentation, see the data sheet
Product Description
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
•
•
•
•
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
Applications
• Switchmode Power Supplies
• Instrumentation
Benefits
•
•
•
•
Reduced power consumption
Accurate Reference Voltage
Allows for use in a broad range of applications
High and stable gain even at very low cathode current
operation
• Accurate and reliable operation over the temperature range
• Accurate reference across temperature
• Easily upgrade performance with no board level change
• Alternate pin configuration
End Products
• Adapters
• Flat TVs
Part Electrical Specifications
Product
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
PPAP
Capable
Active
Adjustable
2.5
1
0.04
0.04
36
0
70
SOIC-8
Active
Adjustable
2.5
1
0.04
0.04
36
0
70
TO-92
Active
Adjustable
2.5
1
0.04
0.04
36
0
70
SOT-23-3
Active
Adjustable
2.5
1
0.04
0.04
36
-40
85
SOIC-8
Active
Adjustable
2.5
1
0.04
0.04
36
-40
85
TO-92
Active
Adjustable
2.5
1
0.04
0.04
36
-40
85
SOT-23-3
Active
Adjustable
2.5
1
0.04
0.04
36
-40
125
SOIC-8
Active
Adjustable
2.5
1
0.04
0.04
36
-40
125
TO-92
Active
Adjustable
2.5
1
0.04
0.04
36
-40
125
TO-92
Active
Adjustable
2.5
1
0.04
0.04
36
-40
125
SOT-23-3
Active
Adjustable
2.5
0.5
0.04
0.04
36
0
70
SOT-23-3
Active
Adjustable
2.5
0.5
0.04
0.04
36
-40
85
SOT-23-3
Active
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
Active
Adjustable
2.5
0.5
0.04
0.04
36
0
70
SOT-23-3
Active
Adjustable
2.5
0.5
0.04
0.04
36
-40
85
SOT-23-3
Active
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
Pb-free
Halide free
NCP431ACLPRAG
PPAP
Capable
Pb-free
Halide free
NCP431ACSNT1G
PPAP
Capable
Pb-free
Halide free
NCP431AIDR2G
PPAP
Capable
Pb-free
Halide free
NCP431AILPRAG
PPAP
Capable
Pb-free
Halide free
NCP431AISNT1G
PPAP
Capable
Pb-free
Halide free
NCP431AVDR2G
PPAP
Capable
Pb-free
Halide free
NCP431AVLPG
PPAP
Capable
Pb-free
Halide free
NCP431AVLPRAG
PPAP
Capable
Pb-free
Halide free
NCP431AVSNT1G
PPAP
Capable
Pb-free
Halide free
NCP431BCSNT1G
PPAP
Capable
Pb-free
Halide free
NCP431BISNT1G
PPAP
Capable
Pb-free
Halide free
NCP431BVSNT1G
PPAP
Capable
Pb-free
Halide free
NCP432BCSNT1G
PPAP
Capable
Pb-free
Halide free
NCP432BISNT1G
PPAP
Capable
Pb-free
Halide free
NCP432BVSNT1G
PPAP
Capable
Pb-free
Halide free
SC431AVSNT1G
AEC
Qualified
Active
Adjustable
2.5
1
0.04
0.04
36
-40
125
SOT-23-3
NEW
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
NEW
Adjustable
2.5
0.5
0.04
0.04
36
-40
125
SOT-23-3
PPAP
Capable
Pb-free
Halide free
SC431BVSNT1G
AEC
Qualified
PPAP
Capable
Pb-free
Halide free
SC432BVSNT1G
AEC
Qualified
PPAP
Capable
Pb-free
Halide free
Application Diagram
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016