component
LM3409MYX
Public Made by Adomby adom
Texas Instruments LED Drivers, MSOP-10-EP. 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
markdownLM3409MYX
Texas Instruments · LED Drivers · MSOP-10-EP
LM3409MYX from Texas Instruments, in a MSOP-10-EP. 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 | UVLO | input | Undervoltage lockout input requiring resistor divider from VIN and GND with turn-on threshold of 1.24 V and hysteresis provided by 22 µA current source. |
| 2 | IADJ | input | Analog LED current adjust input accepting voltage 0-1.24 V, external resistor to GND, or open connection for programmable current sense threshold. |
| 3 | EN | input | Enable and PWM dimming input with rising threshold 1.74 V, falling threshold 0.5 V, and 420 mV hysteresis for low-power shutdown control. |
| 4 | COFF | input | Off-time programming input with external RC network (resistor from output voltage VO and capacitor to GND) setting switching frequency. |
| 5 | GND | power_in | System ground reference connection. |
| 6 | PGATE | output | P-channel MOSFET gate drive output with 2-Ω typical source and sink resistance at 50 mA. |
| 7 | CSN | input | Negative current sense input for high-side differential current measurement; connect to negative terminal of external sense resistor. |
| 8 | CSP | input | Positive current sense input for high-side differential current measurement; connect to positive terminal of sense resistor and VIN. |
| 9 | VCC | power_out | VIN-referenced linear regulator output providing 5.5-6.5 V (typical 6 V) for P-channel MOSFET gate drive; requires 1 µF minimum ceramic bypass capacitor to VIN. |
| 10 | VIN | power_in | Input supply voltage ranging 6 V to 42 V for LM3409 standard variant. |
| 11 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | MSOP-10-EP |
| Category | LED Drivers |
| Pins | 11 |
CAD (KiCad official)
- Symbol:
LM3409MYX - Footprint:
Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm - 3D model: MSOP-10-EP (KiCad packages3D, STEP)
- 3D model files:
lm3409myx-etched.step/lm3409myx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm3409myx.step/lm3409myx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (47 pp, sha256
7745578a43302ee7, retrieved 2026-09-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).