component
LM2840XQMK
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TSOT-23-6. 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
markdownLM2840XQMK
Texas Instruments · DC-DC Converters · TSOT-23-6
LM2840XQMK from Texas Instruments, in a TSOT-23-6. 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 | CB | input | SW FET gate bias voltage; the CBOOT capacitor (0.15 µF ceramic or larger recommended) connects between CB and SW. |
| 2 | GND | power_in | Ground connection; the feedback network ground should connect directly to this pin per the layout guidelines. |
| 3 | FB | input | Feedback pin with VFB = 0.765 V nominal; VOUT = VFB(1 + R1/R2), and the feedback resistors must be 100 Ω to 10 kΩ to avoid input bias errors. |
| 4 | SHDN | input | Logic-level shutdown input that disables the device when pulled to GND and enables it when pulled high; it must not float, and should be tied to VIN if the shutdown function is unused. |
| 5 | VIN | power_in | Power input voltage pin with a 4.5 V to 42 V normal operating range. |
| 6 | SW | output | Power FET output that connects to the inductor, the catch diode and the CBOOT capacitor; SW voltage is rated to 42 V in recommended operating conditions. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
LM2840XQMK - Footprint:
Package_TO_SOT_SMD:TSOT-23-6 - 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lm2840xqmk-etched.step/lm2840xqmk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2840xqmk.step/lm2840xqmk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (25 pp, sha256
9b519afa4d0599ef, retrieved 2026-10-08, 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).