LM4040D50FTA

Diodes Incorporated · Voltage Reference · SOT-23

LM4040D50FTA 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 5.0V reverse breakdown voltage appears relative to the Anode, operating over 60µA to 15mA reverse current.
2	Anode	passive	Anode of the shunt reference, the voltage reference point (GND) to which all device voltages are specified.
3	NC	unconnected	Pin 3 is attached to the die and electrically contacts pin 2, so it 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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Reverse Breakdown Voltage Tolerance		-50	10	50	mV	IR = 100µA, +25°C	2
Reverse Breakdown Voltage Tolerance		-125	60	125	mV	IR = 100µA, -40 to +125°C	2
Minimum Operating Current	IRMIN			85	µA	-40 to +85°C	2
Average Reverse Breakdown Voltage Temperature Coefficient	ΔVR/ΔT	-150	20	150	ppm/°C	IR = 1mA	2
Reverse Breakdown Change with Current	ΔVR/ΔIR			15	mV	1mA ≤ IR ≤ 15mA, -40 to +85°C	2
Reverse Current	IR	0.06		15	mA		2
Operating Ambient Temperature Range	TA	-40		125	°C		2
Continuous Reverse Current				20	mA		2
Continuous Forward Current				10	mA		2
Operating Junction Temperature	TJ	-40		150	°C		2
Storage Temperature	TSTG	-55		150	°C		2
Package Thermal Resistance, Junction to Ambient (SOT23)	θJA		380		°C/W		2
Package Power Dissipation (SOT23)	PDIS			330	mW	TA = +25°C, TJ = +125°C	2

CAD (KiCad official)

Symbol: LM4040D50FTA
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)
3D model files: lm4040d50fta-etched.step / lm4040d50fta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm4040d50fta.step / lm4040d50fta.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Diodes Incorporated datasheet (16 pp, sha256 273ea3e61e9ec2d9, retrieved 2026-10-18, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF

# LM4040D50FTA

**Diodes Incorporated** · Voltage Reference · SOT-23

LM4040D50FTA 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 5.0V reverse breakdown voltage appears relative to the Anode, operating over 60µA to 15mA reverse current. |
| 2 | Anode | passive | Anode of the shunt reference, the voltage reference point (GND) to which all device voltages are specified. |
| 3 | NC | unconnected | Pin 3 is attached to the die and electrically contacts pin 2, so it 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 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage Tolerance |  | -50 | 10 | 50 | mV | IR = 100µA, +25°C | 2 |
| Reverse Breakdown Voltage Tolerance |  | -125 | 60 | 125 | mV | IR = 100µA, -40 to +125°C | 2 |
| Minimum Operating Current | IRMIN |  |  | 85 | µA | -40 to +85°C | 2 |
| Average Reverse Breakdown Voltage Temperature Coefficient | ΔVR/ΔT | -150 | 20 | 150 | ppm/°C | IR = 1mA | 2 |
| Reverse Breakdown Change with Current | ΔVR/ΔIR |  |  | 15 | mV | 1mA ≤ IR ≤ 15mA, -40 to +85°C | 2 |
| Reverse Current | IR | 0.06 |  | 15 | mA |  | 2 |
| Operating Ambient Temperature Range | TA | -40 |  | 125 | °C |  | 2 |
| Continuous Reverse Current |  |  |  | 20 | mA |  | 2 |
| Continuous Forward Current |  |  |  | 10 | mA |  | 2 |
| Operating Junction Temperature | TJ | -40 |  | 150 | °C |  | 2 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 2 |
| Package Thermal Resistance, Junction to Ambient (SOT23) | θJA |  | 380 |  | °C/W |  | 2 |
| Package Power Dissipation (SOT23) | PDIS |  |  | 330 | mW | TA = +25°C, TJ = +125°C | 2 |

## CAD (KiCad official)

- Symbol: `LM4040D50FTA`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lm4040d50fta-etched.step` / `lm4040d50fta-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4040d50fta.step` / `lm4040d50fta.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560080656773234688) (16 pp, sha256 `273ea3e61e9ec2d9`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/lm4040d50fta-datasheet.pdf)