component
TL4051CQDBZR
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
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTL4051CQDBZR
Texas Instruments · Voltage Reference · SOT-23-3
TL4051CQDBZR 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 | FB | input | Feedback input of the adjustable version, connected to the external R1/R2 divider that sets VZ = VREF(1 + R2/R1), with VREF of 1.212 V typ and feedback current of 70 nA typ (130 nA max at 25°C). |
| 2 | CATHODE | passive | Cathode (shunt output) connected through series resistor RS to the supply, with recommended cathode current up to 12 mA, absolute maximum continuous cathode voltage 15 V, and adjustable VZ up to 10 V. |
| 3 | ANODE | power_in | Anode, the ground/return reference of the shunt reference. |
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 (C grade, Q, 25°C) | VREF tolerance | -6 | 6 | mV | IZ = 100μA, VZ = 5V, TA = 25°C | 8 | |
| Reference voltage tolerance (C grade, Q, full range) | VREF tolerance | -12.2 | 12.2 | mV | IZ = 100μA, VZ = 5V, full range (TA = -40°C to 125°C) | 8 | |
| Minimum cathode current (25°C) | IZ,min | 36 | 65 | μA | TA = 25°C | 8 | |
| Minimum cathode current (full range) | IZ,min | 75 | μA | full range (TA = -40°C to 125°C) | 8 | ||
| Reference voltage change with cathode current (IZ,min < IZ < 1mA, 25°C) | DVREF/DIZ | 0.3 | 1.1 | mV | IZ,min < IZ < 1mA, TA = 25°C | 8 | |
| Reference voltage change with cathode current (IZ,min < IZ < 1mA, full range) | DVREF/DIZ | 1.5 | mV | IZ,min < IZ < 1mA, full range | 8 | ||
| Reference voltage change with cathode current (1mA < IZ < 12mA, 25°C) | DVREF/DIZ | 0.6 | 6 | mV | 1mA < IZ < 12mA, TA = 25°C | 8 | |
| Reference voltage change with cathode current (1mA < IZ < 12mA, full range) | DVREF/DIZ | 8 | mV | 1mA < IZ < 12mA, full range | 8 | ||
| Reference voltage change with output voltage (line regulation, 25°C) | DVREF/DVKA | -2.8 | -1.69 | mV/V | IZ = 1mA, TA = 25°C | 8 | |
| Reference voltage change with output voltage (line regulation, full range) | DVREF/DVKA | -3.5 | mV/V | IZ = 1mA, full range | 8 | ||
| Feedback current (25°C) | IFB | 70 | 130 | nA | TA = 25°C | 8 | |
| Feedback current (full range) | IFB | 150 | nA | full range (TA = -40°C to 125°C) | 8 | ||
| Reference voltage temperature coefficient (IZ = 10mA) | αVREF | -20 | 20 | ppm/°C | IZ = 10mA, VZ = 2.5V, TA = 25°C | 8 | |
| Reference voltage temperature coefficient (IZ = 1mA) | αVREF | -15 | 15 | ppm/°C | IZ = 1mA, VZ = 2.5V, TA = 25°C | 8 | |
| Reference voltage temperature coefficient (IZ = 100μA, 25°C) | αVREF | -15 | 15 | ppm/°C | IZ = 100μA, VZ = 2.5V, TA = 25°C | 8 | |
| Reference voltage temperature coefficient (IZ = 100μA, full range) | αVREF | -50 | 50 | ppm/°C | IZ = 100μA, VZ = 2.5V, full range | 8 | |
| Continuous cathode voltage | VZ | 15 | V | 4 | |||
| Continuous cathode current | IZ | -10 | 20 | mA | 4 | ||
| Operating virtual junction temperature | TJ | 150 | °C | 4 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 4 | ||
| Cathode current (recommended) | IZ | 12 | mA | see electrical characteristics | 4 | ||
| Reverse breakdown voltage (adjustable version, recommended) | VZ | 10 | V | adjustable version | 4 | ||
| Operating ambient temperature (Q grade) | TA | -40 | 125 | °C | Q temperature grade (TL4051xQ), natural ventilation | 4 | |
| Reference voltage (adjustable version) | VREF | 1.212 | V | IZ = 100μA, VZ = 5V, TA = 25°C | 8 | ||
| Reverse dynamic impedance (VZ = VREF) | ZZ | 0.3 | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, VZ = VREF, TA = 25°C | 8 | ||
| Reverse dynamic impedance (VZ = 10V) | ZZ | 2 | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1 IZ, VZ = 10V, TA = 25°C | 8 | ||
| Wideband noise | eN | 20 | μVRMS | IZ = 100μA, VZ = VREF, 10Hz ≤ f ≤ 10kHz, TA = 25°C | 8 | ||
| Long-term stability | 120 | ppm | t = 1000h, TA = 25°C ± 0.1°C, IZ = 100μA | 8 | |||
| Thermal hysteresis | VHYST | 0.3 | mV/V | ΔTA = -40°C to 125°C | 8 | ||
| Package thermal resistance, junction to ambient (DBZ) | θJA | 206 | °C/W | DBZ package, JESD 51-7 | 4 |
CAD (KiCad official)
- Symbol:
TL4051CQDBZR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl4051cqdbzr-etched.step/tl4051cqdbzr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl4051cqdbzr.step/tl4051cqdbzr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (33 pp, sha256
739b8ac05dcb64a5, 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).