component
TL4050A41QDBZR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-3. Pinout cross-checked by two models 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
markdownTL4050A41QDBZR
Texas Instruments · Voltage Reference · SOT-23-3
TL4050A41QDBZR from Texas Instruments, in a SOT-23-3. 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 4.096V shunt reference, connected to the supply through a series resistor RS, with cathode current IZ kept between the minimum (73 µA max over temperature for the Q grade ~78 µA) and 15 mA. |
| 2 | ANODE | passive | Anode of the shunt reference, normally connected to ground. |
| 3 | NC | unconnected | Pin 3 (marked *) must be left floating or connected to pin 2 (anode) because of a parasitic Schottky diode between pins 2 and 3; TI recommends tying it to the anode in high-EMI or high-frequency switching noise applications. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| 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 | -4.1 | 4.1 | mV | IZ = 100μA, 25°C | 8 | |
| Reverse breakdown voltage tolerance (full range) | ΔVZ | -25 | 25 | mV | IZ = 100μA, full range TA = -40°C to 125°C | 8 | |
| Minimum cathode current | IZ,min | 52 | 68 | μA | 25°C | 8 | |
| Minimum cathode current (full range) | IZ,min | 78 | μA | Full range TA = -40°C to 125°C | 8 | ||
| Average temperature coefficient of VZ | αVZ | -30 | 30 | ppm/°C | IZ = 10mA, 25°C | 8 | |
| Average temperature coefficient of VZ | αVZ | -20 | 20 | ppm/°C | IZ = 1mA, 25°C | 8 | |
| Average temperature coefficient of VZ | αVZ | -50 | 50 | ppm/°C | IZ = 100μA, full range TA = -40°C to 125°C | 8 | |
| Change in VZ with cathode current | VZ | 0.2 | 0.9 | mV | IZ,min < IZ < 1mA, 25°C | 8 | |
| Change in VZ with cathode current (full range) | VZ | 1.2 | mV | IZ,min < IZ < 1mA, full range TA = -40°C to 125°C | 8 | ||
| Change in VZ with cathode current | VZ | 2 | 7 | mV | 1mA < IZ < 15mA, 25°C | 8 | |
| Change in VZ with cathode current (full range) | VZ | 10 | mV | 1mA < IZ < 15mA, full range TA = -40°C to 125°C | 8 | ||
| Reverse breakdown voltage | VZ | 4.096 | V | IZ = 100μA, 25°C | 8 | ||
| Reverse dynamic impedance | ZZ | 0.5 | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, 25°C | 8 | ||
| Wideband noise | eN | 93 | μVRMS | IZ = 100μA, 10Hz ≤ f ≤ 10 kHz, 25°C | 8 | ||
| Long-term stability of reverse breakdown voltage | VZ | 120 | ppm | t = 1000 h, TA = 25°C ± 0.1°C, IZ = 100μA | 8 | ||
| Thermal hysteresis | VHYST | 1.148 | mV | ΔTA = -40°C to 125°C | 8 | ||
| Cathode current | IZ | 15 | mA | See parameter tables | 4 | ||
| Operating free-air temperature (Q) | TA | -40 | 125 | °C | Q temperature grade | 4 | |
| Continuous cathode current | IZ | -10 | 20 | mA | Measured over operating free-air temperature range, unless otherwise noted | 4 | |
| Operating virtual junction temperature | TJ | 150 | °C | 4 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 4 | ||
| Package thermal resistance, junction-to-ambient (DBZ) | θJA | 206 | °C/W | DBZ package, per JESD 51-7 | 4 |
CAD (KiCad official)
- Symbol:
TL4050A41QDBZR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl4050a41qdbzr-etched.step/tl4050a41qdbzr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl4050a41qdbzr.step/tl4050a41qdbzr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (41 pp, sha256
9518f91a68f71d48, 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).