Document
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
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Pin 1. Reference
123
2. Anode 3. Cathode
STRAIGHT LEAD BULK PACK
1 2 3
BENT LEAD TAPE & REEL AMMO PACK
TO−92 LP SUFFIX CASE 29−10
TO−92 LPRA SUFFIX CASE 29−10
8 1
SOIC−8 NB D SUFFIX CASE 751
Cathode Anode Anode NC
1 (Top View)
Reference Anode Anode NC
3
1 2
SOT−23 SN SUFFIX CASE 318
NCP431/SC431 Pin 1. Reference
2. Cathode 3. Anode
NCP432/SC432 Pin 1. Cathode
2. Reference 3. Anode
ORDERING AND MARKING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
1
April, 2021 − Rev. 17
Publication Order Number: NCP431/D
NCP431A, SC431A, NCP431B, SC431B, NCP432B, SC432B Series
Cathode (K)
Reference (R)
Cathode (K)
Reference (R)
Anode (A)
Figure 1. Symbol
2.5 Vref
Anode (A)
Figure 2. Representative Block diagram
This device contains 20 active transistors
MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted)
Symbol
Rating
Value
Unit
VKA
Cathode to Anode Voltage
IK
Cathode Current Range, Continuous
Iref
Reference Input Current Range, Continuous
TJ
Operating Junction Temperature
TA
Operating Ambient Temperature Range
Tstg
Storage Temperature Range
PD
Total Power Dissipation @ TA = 25°C
Derate above 25°C Ambient Temperature
D, LP Suffix Plastic Package
SN1 Suffix Plastic Package
37
V
−100 to +150
mA
−5 to +10
mA
150
°C
−40 to +125
°C
−65 to +150
°C
W
0.70 0.52
PD
Total Power Dissipation @ TC = 25°C
Derate above 25°C Case Temperature
D, LP Suffix Plastic Package
1.5
W
HBM CDM
ESD Rating (Note 1) Human Body Model per JEDEC JESD22−A114F Charged Device Model per JEDEC JESD22−C101E
V >2000 >1000
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. This device contains latch−up protection and exceeds ±100 mA per JEDEC standard JESD78.
RECOMMENDED OPERATING CONDITIONS
Symbol
Condition
Min
Max
Unit
VKA
Cathode to Anode Voltage
Vref
36
V
IK
Cathode Current
0.04
100
mA
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability.
THERMAL CHARACTERISTICS
Symbol RQJA
RQJL
Characteristic
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Lead (Lead 3)
LP Suffix Package (50 mm2 x 35 mm Cu)
176
D Suffix Package (50 mm2 x 35 mm Cu)
210
SN Suffix Package (10 mm2 x 35 mm Cu)
255
Unit °C/W
75
68
80
°C/W
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NCP431A, SC431A, NCP431B, SC431B, NCP432B, SC432B Series
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.) NCP431AC
NCP431AI
NCP431AV/ SC431AV
Symbol
Characteristic
Min Typ Max Min Typ Max Min Typ Max Unit
Vref
DVrefT DVref DVKA
Reference Input Voltage VKA = Vref, IK = 1 mA TA = 25°C TA = Tlow to Thigh (Figure 3, Note 2)
V
2.475 2.500 2.525 2.475 2.500 2.525 2.475 2.500 2.525 2.475 2.500 2.525 2.465 2.500 2.525 2.460 2.500 2.525
Reference In.