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KIA78L12F-RTF

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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.

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KIA78L12F-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); kia78l12f-rtf.step / kia78l12f-rtf.glb are 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, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF