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© Semiconductor Components Industries, LLC, 2011
April, 2021 − Rev. 17
1 Publication Order Number:
NCP431/D
Programmable Precision
References
NCP431A, SC431A,
NCP431B, SC431B,
NCP432B, SC432B Series
The NCP431/NCP432 integrated circuits are three−terminal
programmable shunt regulator diodes. 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 mA to 100 mA
with a typical dynamic impedance of 0.22 W. 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/
NCP432 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 choice for secondary regulators in
SMPS adapters with extremely low no−load consumption.
Features
• Programmable Output Voltage to 36 V
• Low Minimum Operating Current: 40 mA, Typ @ 25°C
• Voltage Reference Tolerance: ±0.5%, Typ @ 25°C
(NCP431B/NCP432B)
• Low Dynamic Output Impedance, 0.22 W Typical
• Sink Current Capability of 40 mA to 100 mA
• Equivalent Full−Range Temperature Coefficient of 50 ppm/°C
Typical
• Temperature Compensated for Operation over Full Rated Operating
Temperature Range
• SC Prefix for Automotive and Other Applications Requiring Unique
Site and Control Change Requirements; AEC−Q100 Qualified and
PPAP Capable
• These are Pb−Free Devices
Typical Applications
• Voltage Adapters
• Switching Power Supply
• Precision Voltage Reference
• Charger
• Instrumentation
SOIC−8 NB
D SUFFIX
CASE 751
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING AND MARKING INFORMATION
1
8
SOT−23
SN SUFFIX
CASE 318
1
2
3
NCP431/SC431
Pin 1. Reference
2. Cathode
3. Anode
Reference
Anode
Anode
NC
Cathode
Anode
Anode
NC
1
(Top View)
NCP432/SC432
Pin 1. Cathode
2. Reference
3. Anode
www.onsemi.com
TO−92
LP SUFFIX
CASE 29−10
BENT LEAD
TAPE & REEL
AMMO PACK
STRAIGHT LEAD
BULK PACK
TO−92
LPRA SUFFIX
CASE 29−10
Pin 1. Reference
2. Anode
3. Cathode
1
2
3
1
2
3
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