LM5164DDAR
Public Unreviewedby Ray
Texas Instruments DC-DC Converters, SO-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownLM5164DDAR
Texas Instruments · DC-DC Converters · SO-8-EP
LM5164DDAR from Texas Instruments, in a SO-8-EP. 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 | GND | power_in | Ground connection for internal circuits. Solder the exposed pad (EP) to this pin and connect to a large copper plane to reduce thermal resistance. |
| 2 | VIN | power_in | Regulator supply input pin to the high-side power MOSFET and internal bias regulator. Operating range 6 V to 100 V (absolute max 100 V). Connect directly to the input supply of the buck converter with short, low-impedance paths. |
| 3 | EN/UVLO | input | Precision enable and undervoltage lockout (UVLO) programming pin. Below 1.1 V the converter is in shutdown with all functions disabled; between 1.1 V and 1.5 V it is in standby with internal VCC operational and no switching; above 1.5 V (typ) the start-up sequence begins. |
| 4 | RON | input | On-time programming pin. A resistor between this pin and GND sets the buck switch on-time (programmable range ~50 ns to 10000 ns). |
| 5 | FB | input | Feedback input of the voltage regulation comparator. Regulates to VREF = 1.2 V (typ) via an external resistor divider from VOUT. |
| 6 | PGOOD | output | Power good indicator, open-drain output. Connect to a source voltage through an external pull-up resistor between 10 kΩ and 100 kΩ. Internal pull-down resistance ~30 Ω. |
| 7 | BST | power_in | Bootstrap gate-drive supply. Requires a 2.2-nF 50-V X7R ceramic capacitor between BST and SW to bias the internal high-side gate driver. BST-to-SW absolute max is 5.5 V. |
| 8 | SW | passive | Switching node internally connected to the source of the high-side NMOS buck switch and the drain of the low-side NMOS synchronous rectifier. Connect to the switching node of the power inductor. High-side RDSON ~0.725 Ω, low-side RDSON ~0.34 Ω. |
| EP | EP | power_in | Exposed pad of the package. No internal electrical connection. Solder the EP to the GND pin and connect to a large copper plane to reduce thermal resistance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SO-8-EP |
| Category | PMIC |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
LM5164DDAR
CAD (KiCad official)
- Symbol:
LM5164DDAR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8-EP (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lm5164ddar.step |
122 KB | You want the bare part, or you mark your own boards. |
lm5164ddar-etched.step |
1.8 MB | You want the part with LM5164DDAR already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 473 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (35 pp, sha256
7fe36c48561a3b2c, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).