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TLV431CSN1T1G
Public Made by Adomby adom
onsemi Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTLV431CSN1T1G
onsemi · Voltage Reference · SOT-23
TLV431CSN1T1G from onsemi, in a SOT-23. 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 | Reference | passive | Reference input of the shunt regulator; the device regulates so that Vref is 1.24 V typical at IK = 10 mA, and Iref is specified at 0.15 typical with a 0.3 maximum at 10 mA. |
| 2 | Anode | power_in | Common anode of the shunt regulator, which is the reference for the cathode voltage; the cathode-to-anode voltage must be at least Vref and no more than 16 V recommended (18 V absolute maximum). |
| 3 | Cathode | passive | Cathode of the shunt regulator, carrying a continuous cathode current of 0.1 mA to 20 mA recommended (−20 mA to 25 mA absolute range). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
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 Voltage, TA = 25°C | Vref | 1.237 | 1.24 | 1.243 | V | VKA = Vref, IK = 10 mA, TA = 25°C | 4 |
| Reference Voltage, TA = Tlow to Thigh | Vref | 1.228 | 1.252 | V | VKA = Vref, IK = 10 mA, TA = Tlow to Thigh (Note 5) | 4 | |
| Reference Input Voltage Deviation Over Temperature | Vref | 7.2 | 20 | mV | VKA = Vref, IK = 10 mA, TA = Tlow to Thigh (Notes 5, 6, 7) | 4 | |
| Ratio of Reference Input Voltage Change to Cathode Voltage Change | Vref/VKA | -0.6 | -1.5 | mV/V | VKA = Vref to 16 V, IK = 10 mA | 4 | |
| Reference Terminal Current | Iref | 0.15 | 0.3 | µA | IK = 10 mA, R1 = 10 k, R2 = open | 4 | |
| Reference Input Current Deviation Over Temperature | Iref | 0.04 | 0.08 | µA | IK = 10 mA, R1 = 10 k, R2 = open, Notes 5, 6, 7 | 4 | |
| Minimum Cathode Current for Regulation | IK(min) | 30 | 80 | µA | Figure 3 | 4 | |
| Off-State Cathode Current | IK(off) | 0.01 | 0.04 | µA | VKA = 6.0 V, Vref = 0 | 4 | |
| Off-State Cathode Current | IK(off) | 0.012 | 0.05 | µA | VKA = 16 V, Vref = 0 | 4 | |
| Dynamic Impedance | /ZKA/ | 0.25 | 0.4 | Ω | VKA = Vref, IK = 0.1 mA to 20 mA, f ≤ 1.0 kHz, Note 8 | 4 | |
| Cathode to Anode Voltage (recommended) | VKA | 16 | V | 2 | |||
| Cathode Current (recommended) | IK | 0.1 | 20 | mA | 2 | ||
| Cathode to Anode Voltage (maximum rating) | VKA | 18 | V | 2 | |||
| Cathode Current Range, Continuous | IK | -20 | 25 | mA | 2 | ||
| Reference Input Current Range, Continuous | Iref | 0.05 | 10 | mA | 2 | ||
| Operating Junction Temperature | TJ | 150 | °C | 2 | |||
| Operating Ambient Temperature Range (TLV431) | TA | -40 | 85 | °C | TLV431 (not NCV/SCV) | 2 | |
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Thermal Resistance, Junction-to-Ambient, SOT-23-3 (SN1 suffix) | RθJA | 491 | °C/W | SN1 Suffix Package, SOT-23-3 | 2 |
CAD (KiCad official)
- Symbol:
TLV431CSN1T1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
tlv431csn1t1g-etched.step/tlv431csn1t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tlv431csn1t1g.step/tlv431csn1t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (20 pp, sha256
0b54d1df8ad5d3df, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).