component
LM2574MX-12
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOIC-14-300mil. 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
markdownLM2574MX-12
Texas Instruments · DC-DC Converters · SOIC-14-300mil
LM2574MX-12 from Texas Instruments, in a SOIC-14-300mil. 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 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 2 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 3 | FB | input | Feedback sense input; connect to the midpoint of the feedback divider to set VOUT for the ADJ version, or connect directly to the output capacitor for a fixed-output version such as the -12. |
| 4 | SIG_GND | power_in | Signal ground reference for internal references and logic; connect to system ground. |
| 5 | ON/OFF | input | Enable input where high = OFF and low = ON; connect to GND to enable the regulator and do not leave this pin floating. |
| 6 | PWR_GND | power_in | Power ground; connect to system ground and to the ground of CIN and COUT, with the path to CIN kept as short as possible. |
| 7 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 8 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 9 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 10 | VIN | power_in | Supply input to the collector of the high-side transistor; connect to the supply and input bypass capacitor CIN with a short path to PWR_GND, with the LM2574 supply rated up to 40 V (60 V for the HV version). |
| 11 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 12 | OUTPUT | output | Emitter of the power transistor and switching node; connect to the inductor and the cathode of the external diode. |
| 13 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
| 14 | NC | unconnected | No internal connection, but must be soldered to the PCB for best heat transfer. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14-300mil |
| Category | Power Supply Chip |
| Pins | 14 |
CAD (KiCad official)
- Symbol:
LM2574MX-12 - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14-300mil (KiCad packages3D, STEP)
- 3D model files:
lm2574mx-12-etched.step/lm2574mx-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2574mx-12.step/lm2574mx-12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (42 pp, sha256
61a9f44cec6689e8, retrieved 2026-10-12, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).