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KIA78L12F-RTF
Public Made by Adomby adom
KEC Semicon 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
markdownKIA78L12F-RTF
KEC Semicon · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
KIA78L12F-RTF from KEC Semicon, 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 | OUTPUT | power_out | Regulated 12V output (Tj=25°C: 11.5V min, 12V typ, 12.5V max), with a 0.1µF output capacitor used in the test circuit. |
| 2 | GND | power_in | Ground pin, which is also the case (tab) of the SOT-89 package. |
| 3 | INPUT | power_in | Unregulated input; absolute maximum 35V for KIA78L05~15, with a 0.33µF input capacitor used in the test circuit. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| 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 | VOUT | 11.5 | 12 | 12.5 | V | Tj=25 | 7 |
| Output Voltage | VOUT | 11.4 | 12.6 | V | 14.5V VIN 27V, 1.0mA IOUT 40mA | 7 | |
| Input Regulation | Reg line | 120 | 250 | mV | Tj=25, 14.5V VIN 27V | 7 | |
| Input Regulation | Reg line | 100 | 200 | mV | Tj=25, 16V VIN 27V | 7 | |
| Load Regulation | Reg load | 20 | 100 | mV | Tj=25, 1.0mA IOUT 100mA | 7 | |
| Load Regulation | Reg load | 10 | 50 | mV | Tj=25, 1.0mA IOUT 40mA | 7 | |
| Quiescent Current | IB | 3.2 | 6.5 | mA | Tj=25 | 7 | |
| Quiescent Current | IB | 6 | mA | Tj=125 | 7 | ||
| Quiescent Current Change | IB | 1.5 | mA | 16V VIN 27V | 7 | ||
| Quiescent Current Change | IB | 0.1 | mA | 1.0mA IOUT 40mA | 7 | ||
| Ripple Rejection Ratio | RR | 36 | 41 | dB | f=120Hz, 15V VIN 25V, Tj=25 | 7 | |
| Output Noise Voltage | VNO | 80 | μVrms | Ta=25, 10Hz f 100kHz | 7 | ||
| Long Term Stability | VOUT/ t | 24 | mV/1.0kHrs | 7 | |||
| Dropout Voltage | /VIN-VOUT/ | 1.7 | V | Tj=25 | 7 | ||
| Average Temperature Coefficient of Output Voltage | TCVO | 1 | mV/℃ | IOUT=5mA | 7 | ||
| Input Voltage | VIN | 35 | V | KIA78L05~15 (applies to KIA78L12) | 1 | ||
| Power Dissipation | PD | 500 | mW | F package (SOT-89) | 1 | ||
| Operating Junction Temperature | Tj | -30 | 150 | ℃ | 1 | ||
| Operating Temperature | Topr | -40 | 85 | ℃ | 1 | ||
| Storage Temperature | Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
KIA78L12F-RTF - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
kia78l12f-rtf-etched.step/kia78l12f-rtf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kia78l12f-rtf.step/kia78l12f-rtf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (15 pp, sha256
b3817aa781ca7c1e, retrieved 2026-10-19, tier: lcsc) - 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).