LMR33630ADDAR from Texas Instruments, in a ESOP-8. 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	PGND	power_in	Power ground terminal. Connect to system ground and AGND. Connect to bypass capacitor with short, wide traces to minimize input-loop inductance.
2	VIN	power_in	Input supply to the regulator, 3.8 V to 36 V (38 V abs max). Connect a high-quality bypass capacitor directly between this pin and PGND with short, wide traces.
3	EN	input	Enable input to the regulator. High = ON, low = OFF; precision-threshold input. Can be tied directly to VIN. Must not exceed VIN by more than 0.3 V. Do not float.
4	PG	output	Open-drain power-good flag output (22 V abs max, 18 V recommended). Connect to a suitable voltage supply through a current-limiting resistor. High = power OK, low = power bad. Flag pulls low when EN = low. May be left open when not used.
5	FB	input	Feedback input to the regulator. Connect to the tap point of the external feedback voltage divider that sets VOUT (1 V to 24 V). Internal reference is approximately 1 V. Do not float, do not ground.
6	VCC	power_out	Internal 5-V LDO output used as supply for internal control circuits. Do not connect to external loads. Can be used as logic supply for the power-good pull-up. Connect a high-quality 1-µF ceramic capacitor from this pin to GND.
7	BOOT	power_in	Boot-strap supply voltage for the internal high-side gate driver. Connect a high-quality 100-nF ceramic capacitor between this pin and the SW pin (BOOT-to-SW abs max 5.5 V).
8	SW	power_out	Regulator switch node. Connect to the power inductor. Also returns the bootstrap capacitor current. High-dV/dt node - keep the trace short and away from sensitive nodes.
9	AGND	power_in	Analog ground / thermal pad on the bottom of the HSOIC package. Ground reference for internal references and logic; all electrical parameters are measured with respect to this pin. Serves as both AGND connection and the primary thermal path - must be soldered to a ground plane for proper electrical and thermal performance.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	ESOP-8
Category	PMIC
Pins	9

Ordering variants

Same part, different packaging or reel option.

LMR33630ADDAR
LMR33630ADDARBDDA
LMR33630ADDARBDDAR
LMR33630ADDARCDDA
LMR33630ADDARCDDAR
LMR33630ADDARNX
LMR33630ADDARNXR
LMR33630ADDARBRNX
LMR33630ADDARBRNXR
LMR33630ADDARCRNX
LMR33630ADDARCRNXR

CAD (KiCad official)

Symbol: LMR33630ADDAR
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lmr33630addar.step`	193 KB	You want the bare part, or you mark your own boards.
`lmr33630addar-etched.step`	2.5 MB	You want the part with `LMR33630ADDAR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 615 faces against 63 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 (53 pp, sha256 63404cdc9372a289, retrieved 2026-08-17, tier: manufacturer)
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: 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).

Datasheet PDF