component
LM317AEMP
Public Made by Adomby adom
Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Datasheet-verified pinout, 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
markdownLM317AEMP
Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LM317AEMP from Texas Instruments, in a SOT-223-4. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ADJ | output | Adjustment pin for setting output voltage via external resistor network; regulator sources 50-100 μA bias current over operating temperature range. |
| 2 | VOUT | power_out | Regulated output voltage pin supplying 1.25-37 V adjustable output with 1.5 A output current capability. |
| 3 | VIN | power_in | Input voltage pin requiring 4.25-40 V supply with input-to-output differential from 3 V (minimum for regulation) to 40 V (maximum). |
| 4 | VOUT | power_out | Output voltage pin connected to Pin 2 and serves as thermal tab for heat dissipation reducing thermal resistance to 59.6 °C/W. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
CAD (KiCad official)
- Symbol:
LM317AEMP - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files:
lm317aemp-etched.step/lm317aemp-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317aemp.step/lm317aemp.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (45 pp, sha256
e52ccc9532460319, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).