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TL431CDR2G

Public Made by Adom

by adom

onsemi Voltage References, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TL431CDR2G

onsemi · Voltage References · SOIC-8

TL431CDR2G from onsemi, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Cathode passive Shunt regulator cathode, operating VKA from Vref to 36 V (37 V absolute max) with cathode current of 1.0 mA to 100 mA.
2 Anode passive Anode (lowest-potential terminal of the shunt regulator), electrically common to the die attach flag with pins 3, 6 and 7.
3 Anode passive Anode, electrically common to the die attach flag with pins 2, 6 and 7.
4 N/C unconnected No internal connection.
5 N/C unconnected No internal connection.
6 Anode passive Anode, electrically common to the die attach flag with pins 2, 3 and 7.
7 Anode passive Anode, electrically common to the die attach flag with pins 2, 3 and 6.
8 Reference input Reference input that sets the output via an external divider (VKA = Vref(1+R1/R2)+Iref*R1), with Vref of about 2.495 V and reference input current range of -0.05 to +10 mA.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-8
Category Power Management ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reference Input Voltage Vref 2.44 2.495 2.55 V VKA = Vref, IK = 10 mA, TA = 25°C 3
Reference Input Voltage over temperature Vref 2.423 2.567 V VKA = Vref, IK = 10 mA, TA = Tlow to Thigh (0°C to 70°C) 3
Reference Input Voltage Tolerance -2.2 2.2 % TL431CDR2G ordering table 13
Reference Input Voltage Deviation Over Temperature Range ΔVref 3 17 mV VKA = Vref, IK = 10 mA 3
Ratio of Change in Vref to Change in VKA ΔVref/ΔVKA -1.4 -2.7 mV/V IK = 10 mA, VKA = 10 V to Vref 3
Ratio of Change in Vref to Change in VKA ΔVref/ΔVKA -1 -2 mV/V IK = 10 mA, VKA = 36 V to 10 V 3
Reference Input Current Iref 1.8 4 µA IK = 10 mA, R1 = 10 k, R2 = ∞, TA = 25°C 3
Reference Input Current over temperature Iref 5.2 µA IK = 10 mA, R1 = 10 k, R2 = ∞, TA = Tlow to Thigh 3
Reference Input Current Deviation Over Temperature Range ΔIref 0.4 1.2 µA IK = 10 mA, R1 = 10 k, R2 = ∞ 3
Minimum Cathode Current For Regulation Imin 0.5 1 mA VKA = Vref 3
Off-State Cathode Current Ioff 20 1000 nA VKA = 36 V, Vref = 0 V 3
Dynamic Impedance /ZKA/ 0.22 0.5 Ω VKA = Vref, IK = 1.0 mA to 100 mA, f ≤ 1.0 kHz 3
Cathode to Anode Voltage (recommended) VKA 2.495 36 V Min printed as Vref 2
Cathode Current (recommended) IK 1 100 mA 2
Cathode to Anode Voltage (abs max) VKA 37 V 2
Cathode Current Range, Continuous IK -100 150 mA 2
Reference Input Current Range, Continuous Iref -0.05 10 mA 2
Operating Junction Temperature TJ 150 °C 2
Operating Ambient Temperature Range TA 0 70 °C TL431C 2
Storage Temperature Range Tstg -65 150 °C 2
Total Power Dissipation PD 0.7 W TA = 25°C, D suffix plastic package 2
Total Power Dissipation PD 1.5 W TC = 25°C, D suffix plastic package 2
ESD Human Body Model HBM 2000 V >2000, JESD22-A114F 2
ESD Machine Model MM 200 V >200, JESD22-A115C 2
ESD Charged Device Model CDM 500 V >500, JESD22-C101E 2
Thermal Resistance, Junction-to-Ambient RθJA 178 °C/W D, LP suffix package 3
Thermal Resistance, Junction-to-Case RθJC 83 °C/W D, LP suffix package 3
Equivalent Full-Range Temperature Coefficient 50 ppm/°C 1

CAD (KiCad official)

  • Symbol: TL431CDR2G
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: tl431cdr2g-etched.step / tl431cdr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431cdr2g.step / tl431cdr2g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (18 pp, sha256 922e22f14c14db6a, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF