component
LM4040B25QFTA
Public Made by Adomby adom
Diodes Incorporated Voltage Reference, SOT-23. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLM4040B25QFTA
Diodes Incorporated · Voltage Reference · SOT-23
LM4040B25QFTA from Diodes Incorporated, in a SOT-23. 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 | Cathode | passive | Cathode of the shunt reference, where the reverse breakdown voltage VREF (2.5V for the LM4040-25Q) is developed, operating over 60µA to 15mA reverse current. |
| 2 | Anode | passive | Anode of the shunt reference and the voltage reference point for the specified voltages; it is electrically contacted to pin 3. |
| 3 | NC/Anode | passive | Die-attach pin that is electrically connected to pin 2 and must be left floating or connected to pin 2. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 Weight: 0.009 grams (Approximate) | 14 |
CAD (KiCad official)
- Symbol:
LM4040B25QFTA - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040b25qfta-etched.step/lm4040b25qfta-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040b25qfta.step/lm4040b25qfta.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (15 pp, sha256
f8b26a9cc3c3a4b4, retrieved 2026-10-22, tier: lcsc) - 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).