# LM4040C10IDBZR

**Texas Instruments** · Voltage Reference · SOT-23

LM4040C10IDBZR from Texas Instruments, in a SOT-23. 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 | CATHODE | output | Reference voltage output terminal; provides the regulated 10V reference with ±50mV tolerance at 25°C, operating range 15 to 15000 μA. |
| 2 | ANODE | power_in | Ground reference terminal, common return path for cathode current, typically connected to system ground. |
| 3 | NC | unconnected | Parasitic Schottky diode connection between pins 2 and 3 in SOT-23 package; must be left floating or connected to anode (pin 2). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| 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 (25°C) | ΔVZ | -50 |  | 50 | mV | IZ = 150μA, 25°C | 23 |
| Reverse breakdown voltage tolerance (full range) | ΔVZ | -115 |  | 115 | mV | IZ = 150μA, full range TA = -40°C to 85°C | 23 |
| Minimum cathode current (25°C) | IZ,min |  | 75 | 120 | μA | 25°C | 23 |
| Minimum cathode current (full range) | IZ,min |  |  | 125 | μA | full range TA = -40°C to 85°C | 23 |
| Average temperature coefficient of VZ | αVZ | -40 |  | 40 | ppm/°C | IZ = 10mA, 25°C | 23 |
| Average temperature coefficient of VZ | αVZ | -20 |  | 20 | ppm/°C | IZ = 1mA, 25°C | 23 |
| Average temperature coefficient of VZ | αVZ | -100 |  | 100 | ppm/°C | full range TA = -40°C to 125°C (C-grade column) | 23 |
| Change in VZ with cathode current | ΔVZ |  | 0.8 | 1.5 | mV | IZ,min < IZ < 1mA, 25°C | 23 |
| Change in VZ with cathode current (full range) | ΔVZ |  |  | 3.8 | mV | IZ,min < IZ < 1mA, full range | 23 |
| Change in VZ with cathode current | ΔVZ |  | 8 | 14 | mV | 1mA < IZ < 15mA, 25°C | 23 |
| Change in VZ with cathode current (full range) | ΔVZ |  |  | 24 | mV | 1mA < IZ < 15mA, full range | 23 |
| Reverse dynamic impedance | ZZ |  | 0.7 | 1.7 | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1IZ, 25°C | 23 |
| Reverse breakdown voltage | VZ |  | 10 |  | V | IZ = 150μA, 25°C | 23 |
| Wideband noise | eN |  | 180 |  | μVRMS | IZ = 150μA, 10Hz ≤ f ≤ 10kHz, 25°C | 23 |
| Long-term stability of reverse breakdown voltage |  |  | 120 |  | ppm | t = 1000 h, TA = 25°C ± 0.1°C, IZ = 150μA | 23 |
| Thermal hysteresis | VHYST |  | 0.08 |  | % | ΔTA = -40°C to 125°C | 23 |
| Continuous cathode current (recommended) | IZ |  |  | 15 | mA |  | 5 |
| Operating free-air temperature, LM4040xxxI | TA | -40 |  | 85 | °C | LM4040xxxI (industrial grade; this MPN) | 5 |
| Continuous cathode current | IZ | -10 |  | 25 | mA | Stresses beyond these may cause permanent damage | 5 |
| Operating virtual junction temperature | TJ |  |  | 150 | °C |  | 5 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 5 |
| ESD human body model (HBM) | V(ESD) | -2000 |  | 2000 | V | ANSI/ESDA/JEDEC JS-001, all pins | 5 |
| ESD charged device model (CDM) | V(ESD) | -500 |  | 500 | V | JEDEC JESD22-C101, all pins | 5 |
| Junction-to-ambient thermal resistance | RθJA |  | 206 |  | °C/W | DBZ (3-pin) package | 5 |

## CAD (KiCad official)

- Symbol: `LM4040C10IDBZR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lm4040c10idbzr-etched.step` / `lm4040c10idbzr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4040c10idbzr.step` / `lm4040c10idbzr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm4040) (62 pp, sha256 `68faec55d71e5cd5`, retrieved 2026-09-22, 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`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/lm4040c10idbzr-datasheet.pdf)