component
LMR33640ADDAR
Public Made by Adomby adom
Texas Instruments Global Sourcing Parts, ESOP-8. Datasheet-verified pinout, 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
markdownLMR33640ADDAR
Texas Instruments · Global Sourcing Parts · ESOP-8
LMR33640ADDAR 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 with short wide traces to the bypass capacitor. |
| 2 | VIN | power_in | Input supply to the regulator; connect a high-quality bypass capacitor directly from this pin to PGND. |
| 3 | EN | input | Enable input to the regulator; high = ON, low = OFF, can be tied directly to VIN but must not be left floating. |
| 4 | PG | output | Open-drain power-good flag output requiring an external pull-up resistor; high = power OK, low = power bad, and pulls low when EN is low; may be left open when unused. |
| 5 | FB | input | Feedback input to the regulator; connect to the tap point of the output feedback voltage divider and must not be left floating or grounded. |
| 6 | VCC | power_out | Internal 5-V LDO output used to supply internal control circuits; do not connect external loads, connect a high-quality 1-µF capacitor from this pin to PGND. |
| 7 | BOOT | passive | Bootstrap supply voltage for the internal high-side driver; connect a high-quality 100-nF capacitor from this pin to the SW pin. |
| 8 | SW | output | Regulator switch node; connect to the power inductor. |
| 9 | AGND | power_in | Analog ground/thermal pad on the bottom of the device; serves as the ground reference for internal references and logic and as the thermal connection to the PCB heat-sink ground plane; must be soldered to a ground plane for proper electrical and thermal performance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | ESOP-8 |
| Category | Global Sourcing Parts |
| Pins | 9 |
CAD (KiCad official)
- Symbol:
LMR33640ADDAR - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
lmr33640addar-etched.step/lmr33640addar-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmr33640addar.step/lmr33640addar.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (44 pp, sha256
6df39cb52faaed45, retrieved 2026-09-23, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).