component
LM4040CIM3-2.0
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
markdownLM4040CIM3-2.0
Texas Instruments · Voltage Reference · SOT-23
LM4040CIM3-2.0 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 | Cathode is the shunt current input and regulated output voltage pin, connected to the input supply through a series resistor. |
| 2 | Anode | output | Anode is normally connected to ground and is the reference return pin. |
| 3 | * | unconnected | Pin 3 must be left floating or connected to pin 2 (anode); TI recommends connecting it to the anode in high EMI or high-frequency switching noise environments. |
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 current (LM4040-N-2.0) | 60 | 15 | μA 到 mA | 6 | |||
| Industrial temperature range | -40 | 85 | °C | 6 | |||
| Operating temperature range | -40 | 125 | °C | 6 | |||
| Reverse current | 20 | mA | 5 | ||||
| Forward current | 10 | mA | 5 | ||||
| Power dissipation, SOT-23 (M3) package | 306 | mW | TA = 25°C | 5 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 5 | ||
| Initial reverse breakdown voltage tolerance, grade C | -0.5 | 0.5 | % | Grade C initial tolerance, TA = TJ = 25°C | 8 | ||
| Reverse breakdown voltage tolerance | -10 | 10 | mV | IR = 100μA, TA = TJ = 25°C | 8 | ||
| Reverse breakdown voltage tolerance | -23 | 23 | mV | IR = 100μA, TA = TJ = TMIN to TMAX | 8 | ||
| Minimum operating current | IRMIN | 45 | 60 | μA | TA = TJ = 25°C | 8 | |
| Minimum operating current | IRMIN | 65 | μA | TA = TJ = TMIN to TMAX | 8 | ||
| Average reverse breakdown voltage temperature coefficient | ΔVR/ΔT | -20 | 20 | ppm/°C | IR = 10mA | 8 | |
| Average reverse breakdown voltage temperature coefficient | ΔVR/ΔT | -15 | 15 | ppm/°C | IR = 1mA, TA = TJ = 25°C | 8 | |
| Average reverse breakdown voltage temperature coefficient | ΔVR/ΔT | -100 | 100 | ppm/°C | IR = 1mA, TA = TJ = TMIN to TMAX | 8 | |
| Reverse breakdown voltage change with operating current | ΔVR/ΔIR | 0.3 | 0.8 | mV | IRMIN ≤ IR ≤ 1mA, TA = TJ = 25°C | 8 | |
| Reverse breakdown voltage change with operating current | ΔVR/ΔIR | 1 | mV | IRMIN ≤ IR ≤ 1mA, TA = TJ = TMIN to TMAX | 8 | ||
| Reverse breakdown voltage change with operating current | ΔVR/ΔIR | 2.5 | 6 | mV | 1mA ≤ IR ≤ 15mA, TA = TJ = 25°C | 8 | |
| Reverse breakdown voltage change with operating current | ΔVR/ΔIR | 8 | mV | 1mA ≤ IR ≤ 15mA, TA = TJ = TMIN to TMAX | 8 | ||
| Reverse dynamic impedance | ZR | 0.3 | 0.8 | Ω | IR = 1mA, f = 120Hz, IAC = 0.1 IR | 8 | |
| Reverse breakdown voltage | VR | 2.048 | V | IR = 100μA | 8 | ||
| Wideband noise | eN | 35 | μVrms | IR = 100μA, 10Hz ≤ f ≤ 10kHz | 8 | ||
| Reverse breakdown voltage long-term stability | ΔVR | 120 | ppm | t = 1000h, T = 25°C ±0.1°C, IR = 100μA | 8 | ||
| Thermal hysteresis | VHYST | 0.08 | % | ΔT = -40°C to 125°C | 8 | ||
| Junction-to-ambient thermal resistance, DBZ (SOT-23) | RθJA | 291.9 | °C/W | Thermal metric, DBZ (SOT-23) 3-pin package | 6 | ||
| Typical junction-to-ambient thermal resistance, SOT-23 on board | RθJA | 326 | °C/W | SOT-23 package mounted on circuit board (absolute maximum note) | 6 |
CAD (KiCad official)
- Symbol:
LM4040CIM3-2.0 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040cim3-2-0-etched.step/lm4040cim3-2-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040cim3-2-0.step/lm4040cim3-2-0.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (84 pp, sha256
fc3ca7d9c21dc51e, retrieved 2026-11-05, tier: manufacturer) - 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).