component
TL4050B50IDBZR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-3. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTL4050B50IDBZR
Texas Instruments · Voltage Reference · SOT-23-3
TL4050B50IDBZR 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 (reference output) of the 5V shunt reference; operating cathode current IZ is 60µA (typ) to 15mA max, and no output capacitor is required for stability. |
| 2 | ANODE | passive | Anode of the shunt reference, connected to the low-side/ground return of the circuit. |
| 3 | * | passive | Connected through a parasitic Schottky diode to pin 2, so it must be left floating or connected to pin 2 (anode); connecting it to the anode is recommended 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 |
|---|---|---|---|---|---|---|---|
| Initial reverse breakdown voltage tolerance (25°C), B grade | ΔVZ | -10 | 10 | mV | IZ = 100μA, 25°C | 9 | |
| Reverse breakdown voltage tolerance over full range, B grade | ΔVZ | -27 | 27 | mV | IZ = 100μA, full range TA = -40°C to 85°C | 9 | |
| Minimum cathode current, B grade (25°C) | IZ,min | 56 | 74 | μA | 25°C | 9 | |
| Minimum cathode current, B grade (full range) | IZ,min | 80 | μA | full range TA = -40°C to 85°C | 9 | ||
| Average temperature coefficient, B grade | αVZ | -30 | 30 | ppm/°C | IZ = 10mA, 25°C | 9 | |
| Average temperature coefficient, B grade | αVZ | -20 | 20 | ppm/°C | IZ = 1mA, 25°C | 9 | |
| Average temperature coefficient, B grade | αVZ | -50 | 50 | ppm/°C | IZ = 100μA, full range TA = -40°C to 85°C | 9 | |
| Reverse breakdown voltage change with cathode current, B grade | VZ | 0.2 | 1 | mV | IZ,min < IZ < 1mA, 25°C | 9 | |
| Reverse breakdown voltage change with cathode current, B grade | VZ | 1.4 | mV | IZ,min < IZ < 1mA, full range TA = -40°C to 85°C | 9 | ||
| Reverse breakdown voltage change with cathode current, B grade | VZ | 12 | mV | 1mA < IZ < 15mA, full range TA = -40°C to 85°C | 9 | ||
| Reverse breakdown voltage | VZ | 5 | V | IZ = 100μA, 25°C | 9 | ||
| Reverse dynamic impedance | ZZ | 0.5 | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, 25°C | 9 | ||
| Broadband noise | eN | 93 | μVRMS | IZ = 100μA, 10Hz ≤ f ≤ 10 kHz, 25°C | 9 | ||
| Long-term stability of reverse breakdown voltage | 120 | ppm | t = 1000 h, TA = 25°C ± 0.1°C, IZ = 100μA | 9 | |||
| Thermal hysteresis | VHYST | 1.4 | mV | ΔTA = -40°C to 125°C | 9 | ||
| Continuous cathode current | IZ | -10 | 20 | mA | 4 | ||
| Package thermal resistance, junction-to-ambient (DBZ package) | θJA | 206 | °C/W | DBZ package | 4 | ||
| Operating virtual junction temperature | TJ | 150 | °C | 4 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 4 | ||
| Cathode current | IZ | 15 | mA | 4 | |||
| Free-air operating temperature, industrial (I) grade | TA | -40 | 85 | °C | I temperature grade | 4 |
CAD (KiCad official)
- Symbol:
TL4050B50IDBZR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl4050b50idbzr-etched.step/tl4050b50idbzr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl4050b50idbzr.step/tl4050b50idbzr.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 2026-10-21, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).