# LM4041CIDBZT

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

LM4041CIDBZT from Texas Instruments, 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 | FB | input | Feedback pin for setting the adjustable output voltage through an external resistor divider, with VZ = VREF(1 + R2/R1) and VREF of 1.225 V; the feedback pin is ESD-rated at 1 kV HBM, while the other pins are rated at 2 kV. |
| 2 | Cathode | bidirectional | Shunt current and output voltage pin; continuous cathode current is limited to -10 mA to 25 mA and continuous cathode voltage to 15 V (absolute maximum), with IZ kept below the recommended maximum of 12 mA. |
| 3 | Anode | power_in | Anode pin, normally grounded, which serves as the reference return for the shunt regulator. |

## 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 |
|---|---|---|---|---|---|---|---|
| Reference voltage | VREF |  | 1.233 |  | V | IZ = 100μA, VZ = 5V, 25°C | 9 |
| Reference voltage tolerance |  | -6.2 |  | 6.2 | mV | IZ = 100μA, VZ = 5V, 25°C | 9 |
| Reference voltage tolerance |  | -14 |  | 14 | mV | IZ = 100μA, VZ = 5V, full range (–40°C to 85°C) | 9 |
| Minimum cathode current | IZ,min |  | 45 | 75 | μA | 25°C | 9 |
| Minimum cathode current | IZ,min |  |  | 80 | μA | full range (–40°C to 85°C) | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  | 0.7 | 1.5 | mV | IZ,min < IZ < 1mA, 25°C | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  |  | 2 | mV | IZ,min < IZ < 1mA, full range | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  | 2 | 4 | mV | 1mA < IZ < 12mA, 25°C | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  |  | 6 | mV | 1mA < IZ < 12mA, full range | 9 |
| Reference voltage change with output voltage change | ΔVREF/ΔVKA |  | -1.55 | -2 | mV/V | IZ = 1mA, 25°C | 9 |
| Reference voltage change with output voltage change | ΔVREF/ΔVKA |  |  | -2.5 | mV/V | IZ = 1mA, full range | 9 |
| Feedback current | IFB |  | 60 | 100 | nA | 25°C | 9 |
| Feedback current | IFB |  |  | 120 | nA | full range | 9 |
| Average temperature coefficient of reference voltage | αVREF | -20 |  | 20 | ppm/°C | IZ = 10mA, VZ = 5V, 25°C | 9 |
| Average temperature coefficient of reference voltage | αVREF | -15 |  | 15 | ppm/°C | IZ = 1mA, VZ = 5V, 25°C | 9 |
| Average temperature coefficient of reference voltage | αVREF | -100 |  | 100 | ppm/°C | IZ = 1mA, VZ = 5V, full range | 9 |
| Reverse dynamic impedance | ZZ |  | 0.3 |  | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, VZ = VREF, 25°C | 9 |
| Reverse dynamic impedance | ZZ |  | 2 |  | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, VZ = 10V, 25°C | 9 |
| Wideband noise | eN |  | 20 |  | μVRMS | IZ = 100μA, VZ = VREF, 10Hz ≤ f ≤ 10kHz, 25°C | 9 |
| Long-term stability of reverse breakdown voltage |  |  | 120 |  | ppm | t = 1000 h, TA = 25°C ± 0.1°C, IZ = 100μA | 9 |
| Cathode current (recommended) | IZ |  |  | 12 | mA |  | 6 |
| Reverse breakdown voltage (adjustable version) | VZ |  |  | 10 | V | Adjustable version | 6 |
| Free-air temperature (LM4041 I temperature) | TA | -40 |  | 85 | °C | LM4041 (I temperature) | 6 |
| Continuous cathode voltage | VZ |  |  | 15 | V |  | 5 |
| Continuous cathode current | IZ | -10 |  | 25 | mA |  | 5 |
| Operating virtual junction temperature | TJ |  |  | 150 | °C |  | 5 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 5 |
| Package thermal impedance, DBZ package | θJA |  |  | 206 | °C/W | DBZ package (SOT-23-3) | 5 |

## CAD (KiCad official)

- Symbol: `LM4041CIDBZT`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lm4041cidbzt-etched.step` / `lm4041cidbzt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4041cidbzt.step` / `lm4041cidbzt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](http://www.ti.com/cn/lit/gpn/lm4041d) (39 pp, sha256 `efdac4618419c087`, retrieved 2026-10-11, 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 0.3`, 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/lm4041cidbzt-datasheet.pdf)