component
LM4040D20IDBZT
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23. 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
markdownLM4040D20IDBZT
Texas Instruments · Voltage Reference · SOT-23
LM4040D20IDBZT 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 | CATHODE | bidirectional | Parallel current/voltage input; the regulated reverse breakdown voltage (VZ = 2.048 V) is developed between cathode and anode, and cathode current IZ must stay within the datasheet range (IZ,min to 15 mA recommended, 25 mA absolute maximum). |
| 2 | ANODE | output | General-purpose pin, typically grounded, and the reference for the regulated voltage on the cathode. |
| 3 | * | input | Must be left floating or connected to the anode (pin 2), because a parasitic Schottky diode exists between pins 2 and 3 of the SOT-23 package; TI recommends connecting it to the anode in applications with high EMI or significant high-frequency switching noise. |
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 |
|---|---|---|---|---|---|---|---|
| Reverse breakdown voltage tolerance | ΔVZ | -20 | 20 | mV | IZ = 100μA, 25°C | 7 | |
| Reverse breakdown voltage tolerance | ΔVZ | -40 | 40 | mV | IZ = 100μA, full range TA = -40°C to 85°C | 7 | |
| Minimum cathode current | IZ,min | 45 | 75 | μA | 25°C | 7 | |
| Minimum cathode current | IZ,min | 80 | μA | full range TA = -40°C to 85°C | 7 | ||
| Average temperature coefficient of reverse breakdown voltage | αVZ | -20 | 20 | ppm/°C | IZ = 10mA, 25°C | 7 | |
| Average temperature coefficient of reverse breakdown voltage | αVZ | -15 | 15 | ppm/°C | IZ = 1mA, 25°C | 7 | |
| Average temperature coefficient of reverse breakdown voltage | αVZ | -150 | 150 | ppm/°C | full range TA = -40°C to 85°C | 7 | |
| Reverse breakdown voltage change with cathode current | 0.3 | 1 | mV | IZ,min < IZ < 1mA, 25°C | 7 | ||
| Reverse breakdown voltage change with cathode current | 1.2 | mV | IZ,min < IZ < 1mA, full range TA = -40°C to 85°C | 7 | |||
| Reverse breakdown voltage change with cathode current | 2.5 | 8 | mV | 1mA < IZ < 15mA, 25°C | 7 | ||
| Reverse breakdown voltage change with cathode current | 10 | mV | 1mA < IZ < 15mA, full range TA = -40°C to 85°C | 7 | |||
| Reverse dynamic impedance | ZZ | 0.3 | 1.1 | Ω | IZ = 1mA, f = 120Hz, IAC = 0.1IZ, 25°C | 7 | |
| Cathode current | IZ | 15 | mA | 5 | |||
| Operating free-air temperature (LM4040xxxI) | TA | -40 | 85 | °C | LM4040xxxI | 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 | ||
| Reverse breakdown voltage | VZ | 2.048 | V | IZ = 100μA, 25°C | 7 | ||
| Wideband noise | eN | 35 | μVRMS | IZ = 100μA, 10Hz ≤ f ≤ 10kHz, 25°C | 7 | ||
| Long-term stability of reverse breakdown voltage | 120 | ppm | t = 1000 h, TA = 25°C ± 0.1°C, IZ = 100μA | 7 | |||
| Thermal hysteresis | VHYST | 0.08 | % | ΔTA = -40°C to 125°C | 7 | ||
| Junction-to-ambient thermal resistance | RθJA | 206 | °C/W | DBZ 3-pin package | 5 |
CAD (KiCad official)
- Symbol:
LM4040D20IDBZT - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040d20idbzt-etched.step/lm4040d20idbzt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040d20idbzt.step/lm4040d20idbzt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (62 pp, sha256
68faec55d71e5cd5, retrieved 2026-10-10, 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-haiku-5-5(text), consensusclaude-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).