component
LM78L12F
Public Made by Adomby adom
HTC Korea TAEJIN Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. 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
markdownLM78L12F
HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
LM78L12F from HTC Korea TAEJIN Tech, in a SOT-89-3. 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 | VOUT | power_out | Regulated 12V output voltage, which can deliver up to 100mA of output current. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | VIN | power_in | Unregulated input voltage; the recommended input range for the LM78L12 is 14.5V to 27V, with an absolute maximum of 35V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| Package | SOT-89-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage (25℃) | VOUT | 11.5 | 12 | 12.5 | V | 25℃, 1mA ≤ Io ≤ 40mA, 14V ≤ VIN ≤ 27V | 8 |
| Output Voltage (over temperature) | VOUT | 11.4 | 12 | 12.6 | V | 1mA ≤ Io ≤ 70mA, -30℃ ~ 125℃ | 8 |
| Line Regulation | ΔVLINE | 55 | 250 | mV | 14.5V ≤ VIN ≤ 27V | 8 | |
| Line Regulation | ΔVLINE | 49 | 200 | mV | 16V ≤ VIN ≤ 27V, 25℃ | 8 | |
| Load Regulation | ΔVLOAD | 22 | 100 | mV | 1mA ≤ Io ≤ 100mA | 8 | |
| Load Regulation | ΔVLOAD | 13 | 50 | mV | 1mA ≤ Io ≤ 40mA, 25℃ | 8 | |
| Bias Current | IB | 4.3 | 6.5 | mA | 25℃ | 8 | |
| Bias Current | IB | 6 | mA | 125℃ | 8 | ||
| Bias Current Change | ΔIB | 1.5 | mA | 16V ≤ VIN ≤ 27V | 8 | ||
| Bias Current Change | ΔIB | 0.1 | mA | 1mA ≤ Io ≤ 40mA, -30℃ ~ 125℃ | 8 | ||
| Ripple Rejection | RR | 37 | 42 | dB | 15V ≤ VIN ≤ 25V, f=120Hz, 25℃ | 8 | |
| Input Voltage (absolute maximum, LM78L12 ~ LM78L18) | VIN | 35 | V | LM78L12 ~ LM78L18 | 1 | ||
| Lead Temperature (soldering, 10 sec) | TSOL | 260 | ℃ | Soldering, 10 sec | 1 | ||
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | 1 | ||
| Operating Junction Temperature Range | TJOPR | -40 | 150 | ℃ | 1 | ||
| Input Voltage (recommended, LM78L12) | VIN | 14.5 | 27 | V | LM78L12 | 2 | |
| Output Current | Io | 100 | 100 | mA | 2 | ||
| Operating Virtual Junction Temperature | TJ | -40 | 125 | ℃ | 2 | ||
| Output Noise Voltage | VN | 70 | uV | 10Hz ≤ f ≤ 100kHz, 25℃ | 8 | ||
| Dropout Voltage | VD | 1.7 | V | 25℃ | 8 |
CAD (KiCad official)
- Symbol:
LM78L12F - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
lm78l12f-etched.step/lm78l12f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm78l12f.step/lm78l12f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTC Korea TAEJIN Tech datasheet (11 pp, sha256
b5b1ed6d19d1619d, retrieved 2026-10-17, tier: lcsc) - 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).