# LM4041BIDCKR

**Texas Instruments** · Voltage Reference · SC-70-5

LM4041BIDCKR from Texas Instruments, in a SC-70-5. 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 | NC | unconnected | No connect on the adjustable SC70 (DCK) package, per the ADJ pin table. |
| 2 | Anode | power_in | Anode pin, normally grounded; the datasheet lists its direction as O, but it functions as the common return. |
| 3 | Cathode | bidirectional | Shunt current and output voltage; the datasheet's absolute maximum continuous cathode current is -10 mA to 25 mA, with 12 mA as the maximum recommended current. |
| 4 | NC | unconnected | No connect on the adjustable SC70 (DCK) package, per the ADJ pin table. |
| 5 | FB | input | Feedback pin for setting the adjustable output voltage between 1.225 V and 10 V with an external divider; it is rated 1 kV HBM, lower than the 2 kV rating of the other pins. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SC-70-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Cathode current (continuous) recommended maximum | IZ |  |  | 12 | mA | Recommended operating conditions; see parametric tables | 6 |
| Reverse breakdown voltage (adjustable version) | VZ |  |  | 10 | V | Adjustable version | 6 |
| Free-air temperature | TA | -40 |  | 85 | °C | LM4041 (I temperature) | 6 |
| Continuous cathode current | IZ | -10 |  | 25 | mA | Free-air temperature range | 5 |
| Continuous cathode voltage | VZ |  |  | 15 | V | Free-air temperature range | 5 |
| Operating virtual junction temperature | TJ |  |  | 150 | °C |  | 5 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 5 |
| Package thermal impedance, DCK package (SC70-5) | θJA |  | 252 |  | °C/W | DCK package, per JESD 51-7 | 5 |
| Reference voltage tolerance |  | -2.5 |  | 2.5 | mV | IZ = 100μA, VZ = 5V, TA = 25°C | 9 |
| Reference voltage tolerance |  | -10.5 |  | 10.5 | mV | IZ = 100μA, VZ = 5V, full range TA = -40°C to 85°C | 9 |
| Minimum cathode current | IZ,min |  | 45 | 75 | μA | TA = 25°C | 9 |
| Minimum cathode current | IZ,min |  |  | 80 | μA | full range TA = -40°C to 85°C | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  | 0.7 | 1.5 | mV | IZ,min < IZ < 1mA, TA = 25°C | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  |  | 2 | mV | IZ,min < IZ < 1mA, full range TA = -40°C to 85°C | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  | 2 | 4 | mV | 1mA < IZ < 12mA, TA = 25°C | 9 |
| Reference voltage change with cathode current change | ΔVREF/ΔIZ |  |  | 6 | mV | 1mA < IZ < 12mA, full range TA = -40°C to 85°C | 9 |
| Reference voltage change with output voltage change | ΔVREF/ΔVKA |  | -1.55 | -2 | mV/V | IZ = 1mA, TA = 25°C | 9 |
| Reference voltage change with output voltage change | ΔVREF/ΔVKA |  |  | -2.5 | mV/V | IZ = 1mA, full range TA = -40°C to 85°C | 9 |
| Feedback current | IFB |  | 60 | 100 | nA | TA = 25°C | 9 |
| Feedback current | IFB |  |  | 120 | nA | full range TA = -40°C to 85°C | 9 |
| Average temperature coefficient of reference voltage | αVREF | -20 |  | 20 | ppm/°C | IZ = 10mA, VZ = 5V, TA = 25°C | 9 |
| Average temperature coefficient of reference voltage | αVREF | -15 |  | 15 | ppm/°C | IZ = 1mA, VZ = 5V, TA = 25°C | 9 |
| Average temperature coefficient of reference voltage | αVREF | -100 |  | 100 | ppm/°C | IZ = 1mA, VZ = 5V, full range TA = -40°C to 85°C | 9 |
| Reverse breakdown voltage (reference voltage) | VREF |  | 1.233 |  | V | IZ = 100μA, VZ = 5V, TA = 25°C | 9 |
| Reverse dynamic impedance | ZZ |  | 0.3 |  | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, VZ = VREF, TA = 25°C | 9 |
| Reverse dynamic impedance | ZZ |  | 2 |  | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, VZ = 10V, TA = 25°C | 9 |
| Wideband noise | eN |  | 20 |  | μVRMS | IZ = 100μA, VZ = VREF, 10Hz ≤ f ≤ 10kHz, TA = 25°C | 9 |
| Long-term stability of reverse breakdown voltage |  |  | 120 |  | ppm | t = 1000 h, TA = 25°C ± 0.1°C, IZ = 100μA | 9 |

## CAD (KiCad official)

- Symbol: `LM4041BIDCKR`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `lm4041bidckr-etched.step` / `lm4041bidckr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4041bidckr.step` / `lm4041bidckr.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/lm4041bidckr-datasheet.pdf)