component
LM34910SDX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, WSON-10-EP(4x4). 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
markdownLM34910SDX
Texas Instruments · DC-DC Converters · WSON-10-EP(4x4)
LM34910SDX from Texas Instruments, in a WSON-10-EP(4x4). 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 | SW | output | Switching node, internally connected to the buck switch source; connect to the external inductor, diode, and boost capacitor. |
| 2 | BST | passive | Boost pin for the bootstrap capacitor; connect a 0.022 µF capacitor from SW to this pin, which the internal diode charges during the off-time. |
| 3 | ISEN | input | Current sense input; the current sense resistor connects from this pin to SGND, and current limit is set at 1.25A. |
| 4 | SGND | power_in | Sense ground; re-circulating current flows into this pin to the current sense resistor. |
| 5 | RTN | power_in | Ground for all internal circuitry other than the current limit detection. |
| 6 | FB | input | Feedback input to the regulation and over-voltage comparators; the regulation level is 2.5V. |
| 7 | SS | passive | Soft-start pin; an internal 11.5 µA current source charges an external capacitor to 2.5V to provide the soft-start function. |
| 8 | RON/SD | input | An external resistor from VIN to this pin sets the buck switch on-time; grounding this pin shuts down the regulator. |
| 9 | VCC | power_out | Start-up regulator output, nominally regulated to 7.0V; an external 8V-14V auxiliary voltage can be connected to reduce internal dissipation. |
| 10 | VIN | power_in | Input supply voltage with a nominal range of 8.0V to 36V; an internal diode connects VCC to VIN. |
| 11 | EP | passive | Exposed thermal pad on the package bottom, internally connected to the IC substrate; it should be soldered to a ground plane with several vias for heat dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-10-EP(4x4) |
| Category | Power Management (PMIC) |
| Pins | 11 |
CAD (KiCad official)
- Symbol:
LM34910SDX - Footprint:
Package_SON:WSON-10-1EP_4x4mm_P0.8mm_EP2.6x3mm - 3D model: WSON-10-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
lm34910sdx-etched.step/lm34910sdx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm34910sdx.step/lm34910sdx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (20 pp, sha256
19b89eb15c3826bf, retrieved 2026-10-11, tier: lcsc) - 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).