component
LM2937IMPX-12
Public Made by Adomby adom
Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM2937IMPX-12
Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LM2937IMPX-12 from Texas Instruments, in a SOT-223-4. 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 | INPUT | input | Unregulated voltage input; the recommended input range is VOUT + 1 V to 26 V, with 60 V transient protection. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | OUTPUT | output | Regulated voltage output that requires an output capacitor to maintain stability, with ESR stable below 3 Ω. |
| 4 | TAB | power_in | Thermal and ground connection internally tied to device pin 2 (GND); connect to GND or leave floating and do not connect to any other potential. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage | VOUT | 11.64 | 12 | 12.36 | V | TA = TJ = 25°C, 5 mA ≤ IOUT ≤ IOUT(MAX) | 7 |
| Output voltage | VOUT | 11.4 | 12 | 12.6 | V | 5 mA ≤ IOUT ≤ IOUT(MAX) | 7 |
| Dropout voltage | VDROPOUT | 0.5 | 1 | V | IOUT = IOUT(MAX) | 7 | |
| Dropout voltage | VDROPOUT | 110 | 250 | mV | IOUT = 50 mA | 7 | |
| Line regulation | 36 | 120 | mV | (VOUT + 2V) ≤ VIN ≤ 26V, IOUT = 5 mA | 7 | ||
| Load regulation | 12 | 120 | mV | 5 mA ≤ IOUT ≤ IOUT(MAX) | 7 | ||
| Quiescent current | IQ | 2 | 10 | mA | (VOUT + 2V) ≤ VIN ≤ 26V, IOUT = 5 mA | 7 | |
| Quiescent current | IQ | 10 | 20 | mA | VIN = (VOUT + 5V), IOUT = IOUT(MAX) | 7 | |
| Short-circuit current | ISC | 0.6 | 1 | A | 7 | ||
| Peak line transient voltage | 60 | 75 | V | tf < 100 ms, RL = 100 Ω | 7 | ||
| Maximum operational input voltage | VIN | 26 | V | 7 | |||
| Reverse DC input voltage | VIN | -15 | -30 | V | VOUT ≥ -0.6 V, RL = 100 Ω | 7 | |
| Reverse transient input voltage | VIN | -50 | -75 | V | tr < 1 ms, RL = 100 Ω | 7 | |
| Junction temperature (LM2937IMP, DCY) | TJ | -40 | 85 | °C | Recommended operating free-air temperature range, DCY (SOT-223) package | 4 | |
| Input voltage | VIN | 26 | V | VOUT + 1 V ≤ VIN ≤ 26 V | 4 | ||
| Output capacitor | COUT | 10 | µF | Minimum capacitance over full expected operating temperature range | 13 | ||
| Input voltage continuous | VIN | 26 | V | Continuous | 4 | ||
| Input voltage transient | VIN | 60 | V | t ≤ 100 ms | 4 | ||
| Maximum junction temperature | TJ | 150 | °C | 4 | |||
| Junction-to-ambient thermal resistance | RθJA | 58.3 | °C/W | DCY (SOT-223), 4 pins | 4 | ||
| Junction-to-case (bottom) thermal resistance | RθJC(bot) | 22.5 | °C/W | DCY (SOT-223), 4 pins | 4 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 39.2 | °C/W | DCY (SOT-223), 4 pins | 4 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | is practical to the package. The ground connections for CIN and COUT should be back to the LM2937 ground pin using as wide, and as short, of a copper trace as is practical. | 18 |
CAD (KiCad official)
- Symbol:
LM2937IMPX-12 - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files:
lm2937impx-12-etched.step/lm2937impx-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2937impx-12.step/lm2937impx-12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (35 pp, sha256
de6b9175f075271f, retrieved 2026-11-06, tier: manufacturer) - 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).
# LM2937IMPX-12
**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LM2937IMPX-12 from Texas Instruments, in a SOT-223-4. 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 | INPUT | input | Unregulated voltage input; the recommended input range is VOUT + 1 V to 26 V, with 60 V transient protection. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | OUTPUT | output | Regulated voltage output that requires an output capacitor to maintain stability, with ESR stable below 3 Ω. |
| 4 | TAB | power_in | Thermal and ground connection internally tied to device pin 2 (GND); connect to GND or leave floating and do not connect to any other potential. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage | VOUT | 11.64 | 12 | 12.36 | V | TA = TJ = 25°C, 5 mA ≤ IOUT ≤ IOUT(MAX) | 7 |
| Output voltage | VOUT | 11.4 | 12 | 12.6 | V | 5 mA ≤ IOUT ≤ IOUT(MAX) | 7 |
| Dropout voltage | VDROPOUT | | 0.5 | 1 | V | IOUT = IOUT(MAX) | 7 |
| Dropout voltage | VDROPOUT | | 110 | 250 | mV | IOUT = 50 mA | 7 |
| Line regulation | | | 36 | 120 | mV | (VOUT + 2V) ≤ VIN ≤ 26V, IOUT = 5 mA | 7 |
| Load regulation | | | 12 | 120 | mV | 5 mA ≤ IOUT ≤ IOUT(MAX) | 7 |
| Quiescent current | IQ | | 2 | 10 | mA | (VOUT + 2V) ≤ VIN ≤ 26V, IOUT = 5 mA | 7 |
| Quiescent current | IQ | | 10 | 20 | mA | VIN = (VOUT + 5V), IOUT = IOUT(MAX) | 7 |
| Short-circuit current | ISC | | 0.6 | 1 | A | | 7 |
| Peak line transient voltage | | | 60 | 75 | V | tf < 100 ms, RL = 100 Ω | 7 |
| Maximum operational input voltage | VIN | | | 26 | V | | 7 |
| Reverse DC input voltage | VIN | | -15 | -30 | V | VOUT ≥ -0.6 V, RL = 100 Ω | 7 |
| Reverse transient input voltage | VIN | | -50 | -75 | V | tr < 1 ms, RL = 100 Ω | 7 |
| Junction temperature (LM2937IMP, DCY) | TJ | -40 | | 85 | °C | Recommended operating free-air temperature range, DCY (SOT-223) package | 4 |
| Input voltage | VIN | | | 26 | V | VOUT + 1 V ≤ VIN ≤ 26 V | 4 |
| Output capacitor | COUT | 10 | | | µF | Minimum capacitance over full expected operating temperature range | 13 |
| Input voltage continuous | VIN | | | 26 | V | Continuous | 4 |
| Input voltage transient | VIN | | | 60 | V | t ≤ 100 ms | 4 |
| Maximum junction temperature | TJ | | | 150 | °C | | 4 |
| Junction-to-ambient thermal resistance | RθJA | | 58.3 | | °C/W | DCY (SOT-223), 4 pins | 4 |
| Junction-to-case (bottom) thermal resistance | RθJC(bot) | | 22.5 | | °C/W | DCY (SOT-223), 4 pins | 4 |
| Junction-to-case (top) thermal resistance | RθJC(top) | | 39.2 | | °C/W | DCY (SOT-223), 4 pins | 4 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | | is practical to the package. The ground connections for CIN and COUT should be back to the LM2937 ground pin using as wide, and as short, of a copper trace as is practical. | 18 |
## CAD (KiCad official)
- Symbol: `LM2937IMPX-12`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `lm2937impx-12-etched.step` / `lm2937impx-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2937impx-12.step` / `lm2937impx-12.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm2937.pdf) (35 pp, sha256 `de6b9175f075271f`, retrieved 2026-11-06, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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](docs/lm2937impx-12-datasheet.pdf)