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LM2940T-3.3
Public Made by Adomby adom
HTC Korea TAEJIN Tech Linear Voltage Regulators (LDO), TO-220. 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
markdownLM2940T-3.3
HTC Korea TAEJIN Tech · Linear Voltage Regulators (LDO) · TO-220
LM2940T-3.3 from HTC Korea TAEJIN Tech, in a TO-220. 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 | VIN | power_in | Input voltage pin; recommended maximum 26V (survival rating -20V to 30V), with CIN of at least 1uF required for stability. |
| 2 | GND | power_in | Ground pin. |
| 3 | VOUT | power_out | Regulated 3.3V output delivering up to 1A, with COUT of at least 10uF required for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| Package | TO-220 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage Tolerance | VO | -1 | 1 | % | IOUT = 5mA | 5 | |
| Output Voltage Tolerance | VO | -2 | 2 | % | 5 mA ≤ IOUT ≤ 1A, (VOUT+1V) ≤ VIN ≤ 26V | 5 | |
| Line Regulation | ΔVLINE | 0.06 | 0.5 | % | IOUT = 5mA, (VOUT+1V) ≤ VIN ≤ 26V | 5 | |
| Load Regulation | ΔVLOAD | 0.2 | 1 | % | VIN = VOUT +1V, 5 mA ≤ IOUT ≤ 1A | 5 | |
| Output Voltage Temperature Coefficient | ΔVOUT/ΔT | 100 | ppm/°C | 5 | |||
| Dropout Voltage | VDROP | 60 | 180 | mV | IOUT = 5mA | 5 | |
| Dropout Voltage | VDROP | 400 | 630 | mV | IOUT = 1A | 5 | |
| Ground Pin Current | IGND | 250 | 500 | μA | IOUT = 5mA | 5 | |
| Ground Pin Current | IGND | 16 | 25 | mA | IOUT = 1A | 5 | |
| Input Supply Voltage (Survival) | VIN | -20 | 30 | V | 1 | ||
| Maximum Output Current | IOUT_MAX | 1 | A | 1 | |||
| Lead Temperature | TSOL | 260 | °C | 1 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 1 | ||
| Operating Junction Temperature Range (absolute max table) | TOPR | -40 | 125 | °C | 1 | ||
| Input Supply Voltage | VIN | 26 | V | 1 | |||
| Operating Junction Temperature Range | TOPR | -40 | 85 | °C | 1 | ||
| Thermal Resistance Junction-To-Ambient TO-220-3L | θJA-TO-220-3L | 70 | °C/W | No heat sink / No air flow / No adjacent heat source / TA=25°C | 6 | ||
| Dropout Voltage | VDROP | 170 | mV | IOUT = 100mA | 5 | ||
| Ground Pin Current at Dropout | IGNDDO | 1 | mA | VIN = 0.5V less than specified VOUT, IOUT = 5mA | 5 | ||
| Current Limit | ICL | 1.5 | A | VOUT = 0V | 5 |
CAD (KiCad official)
- Symbol:
LM2940T-3.3 - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files:
lm2940t-3-3-etched.step/lm2940t-3-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2940t-3-3.step/lm2940t-3-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTC Korea TAEJIN Tech datasheet (7 pp, sha256
69be479de06a1346, retrieved 2026-10-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).