component
KIA78D09F-RTF
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KEC Semicon Linear Voltage Regulators (LDO), TO-252-2(DPAK). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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KIA78D09F-RTF
KEC Semicon · Linear Voltage Regulators (LDO) · TO-252-2(DPAK)
KIA78D09F-RTF from KEC Semicon, in a TO-252-2(DPAK). 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 | INPUT | power_in | Unregulated DC input to the regulator, with an absolute maximum input voltage (VIN) of 35 V. |
| 2 | GND | power_in | Common ground return for the regulator. |
| 3 | OUTPUT | power_out | Regulated 9 V output (KIA78D09F, typical 9.0 V, 8.78 V to 9.22 V) with a maximum output current of 1 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | TO-252-2(DPAK) |
| 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 (KIA78D09F) | VO | 8.78 | 9 | 9.22 | V | 2 | |
| Load Regulation | Reg Load | 0.5 | % | 5mA IOUT 1A | 2 | ||
| Line Regulation | Reg Line | 0.5 | % | Note 2: VIN=10 to 25V (KIA78D09F) | 2 | ||
| Ripple Rejection | RR | 45 | 55 | dB | 2 | ||
| Dropout Voltage | VD | 0.5 | V | Note 3: VIN=0.95VO | 2 | ||
| Quiescent Current | IQ | 10 | mA | IOUT=0A | 2 | ||
| Input Voltage | VIN | 35 | V | 1 | |||
| Output Current | IO | 1 | A | 1 | |||
| Power Dissipation | Pd | 1.3 | W | No heatsink | 1 | ||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Operating Temperature | Topr | -40 | 85 | °C | 1 | ||
| Storage Temperature | Tstg | -50 | 150 | °C | 1 | ||
| Soldering Temperature | Tsol | 260 | °C | 10 sec | 1 | ||
| Thermal Resistance, Junction-to-Case | J-C | 9.62 | °C/W | 4 | |||
| Thermal Resistance, Junction-to-Ambient | J-A | 96.2 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
KIA78D09F-RTF - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
- 3D model files:
kia78d09f-rtf-etched.step/kia78d09f-rtf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kia78d09f-rtf.step/kia78d09f-rtf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (5 pp, sha256
10dd8731329abf96, retrieved 2026-10-25, 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).
# KIA78D09F-RTF
**KEC Semicon** · Linear Voltage Regulators (LDO) · TO-252-2(DPAK)
KIA78D09F-RTF from KEC Semicon, in a TO-252-2(DPAK). 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 | INPUT | power_in | Unregulated DC input to the regulator, with an absolute maximum input voltage (VIN) of 35 V. |
| 2 | GND | power_in | Common ground return for the regulator. |
| 3 | OUTPUT | power_out | Regulated 9 V output (KIA78D09F, typical 9.0 V, 8.78 V to 9.22 V) with a maximum output current of 1 A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | TO-252-2(DPAK) |
| 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 (KIA78D09F) | VO | 8.78 | 9 | 9.22 | V | | 2 |
| Load Regulation | Reg Load | | | 0.5 | % | 5mA IOUT 1A | 2 |
| Line Regulation | Reg Line | | | 0.5 | % | Note 2: VIN=10 to 25V (KIA78D09F) | 2 |
| Ripple Rejection | RR | 45 | 55 | | dB | | 2 |
| Dropout Voltage | VD | | | 0.5 | V | Note 3: VIN=0.95VO | 2 |
| Quiescent Current | IQ | | | 10 | mA | IOUT=0A | 2 |
| Input Voltage | VIN | | | 35 | V | | 1 |
| Output Current | IO | | | 1 | A | | 1 |
| Power Dissipation | Pd | | | 1.3 | W | No heatsink | 1 |
| Junction Temperature | Tj | | | 150 | °C | | 1 |
| Operating Temperature | Topr | -40 | | 85 | °C | | 1 |
| Storage Temperature | Tstg | -50 | | 150 | °C | | 1 |
| Soldering Temperature | Tsol | | | 260 | °C | 10 sec | 1 |
| Thermal Resistance, Junction-to-Case | J-C | | 9.62 | | °C/W | | 4 |
| Thermal Resistance, Junction-to-Ambient | J-A | | 96.2 | | °C/W | | 4 |
## CAD (KiCad official)
- Symbol: `KIA78D09F-RTF`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
- 3D model files: `kia78d09f-rtf-etched.step` / `kia78d09f-rtf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kia78d09f-rtf.step` / `kia78d09f-rtf.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [KEC Semicon datasheet](docs/kia78d09f-rtf-datasheet.pdf) (5 pp, sha256 `10dd8731329abf96`, retrieved 2026-10-25, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/kia78d09f-rtf-datasheet.pdf)