component
LM431SCCM3X
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
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLM431SCCM3X
onsemi · Voltage Reference · SOT-23
LM431SCCM3X 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 | Cathode | passive | Cathode is the regulated output; the datasheet limits VKA to 36 V recommended (37 V absolute maximum) and continuous IKA to 1 to 100 mA recommended (−100 to +150 mA absolute range). |
| 2 | Ref | input | Reference input sets the output voltage through two external resistors, with VREF about 2.5 V (2.482 V to 2.508 V for the LM431SC at IKA = 10 mA) and an absolute IREF range of −0.05 to +10 mA. |
| 3 | Anode | passive | Anode is the shunt-regulator return terminal; the datasheet gives no separate voltage or current rating for this pin beyond the cathode-to-anode conditions in the electrical characteristics. |
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 input voltage | VREF | 2.482 | 2.495 | 2.508 | V | VKA = VREF, IKA = 10 mA (LM431SC column) | 3 |
| Deviation of reference input voltage over temperature, SOT-23 | VREF / T | 6.6 | 24 | mV | VKA = VREF, IKA = 10 mA, TMIN ≤ TA ≤ TMAX | 3 | |
| Ratio of change in reference voltage to cathode voltage (VKA = 10 V − VREF) | VREF / VKA | -1 | -2.7 | mV/V | IKA = 10 mA, VKA = 10 V − VREF | 3 | |
| Ratio of change in reference voltage to cathode voltage (VKA = 36 V − 10 V) | VREF / VKA | -0.5 | -2 | mV/V | IKA = 10 mA, VKA = 36 V − 10 V | 3 | |
| Reference input current | IREF | 1.5 | 4 | μA | IKA = 10 mA, R1 = 10 K, R2 = ∞ | 3 | |
| Deviation of reference input current over full temperature range, SOT-23 | IREF / T | 0.8 | 2 | μA | IKA = 10 mA, R1 = 10 K, R2 = ∞, TA = Full Range | 3 | |
| Minimum cathode current for regulation | IKA(MIN) | 0.45 | 1 | mA | VKA = VREF | 3 | |
| Off-stage cathode current | IKA(OFF) | 0.05 | 1 | μA | VKA = 36 V, VREF = 0 | 3 | |
| Dynamic impedance | ZKA | 0.15 | 0.5 | Ω | VKA = VREF, IKA = 1 to 100 mA, f ≥ 1.0 kHz | 3 | |
| Cathode voltage | VKA | 37 | V | Absolute maximum rating | 2 | ||
| Cathode current range (continuous) | IKA | -100 | 150 | mA | Continuous | 2 | |
| Reference input current range | IREF | -0.05 | 10 | mA | 2 | ||
| Thermal resistance junction-air, SOT-23 (M3/M32 suffix) | RθJA | 400 | °C/W | Junction-air, notes 2 and 3 (no ambient airflow) | 2 | ||
| Power dissipation, SOT-23 (M3/M32 suffix) | PD | 310 | mW | Notes 4 and 5; ratings apply at TA = 25°C | 2 | ||
| Junction temperature | TJ | 150 | °C | 2 | |||
| Operating temperature range | TOPR | -25 | 85 | °C | All products except LM431SAIMFX, SBIMFX, SCIMFX | 2 | |
| Storage temperature range | TSTG | -65 | 150 | °C | 2 | ||
| Cathode voltage (recommended) | VKA | 36 | V | Minimum printed as VREF (no numeric minimum) | 2 | ||
| Cathode current (recommended) | IKA | 1 | 100 | mA | 2 |
CAD (KiCad official)
- Symbol:
LM431SCCM3X - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm431sccm3x-etched.step/lm431sccm3x-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm431sccm3x.step/lm431sccm3x.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (12 pp, sha256
a0a62baaf62b5629, retrieved 2026-10-18, 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).