component
78D12LL
Public Made by Adomby adom
UTC(Unisonic Tech) Linear Voltage Regulators (LDO), TO-252. 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
markdown78D12LL
UTC(Unisonic Tech) · Linear Voltage Regulators (LDO) · TO-252
78D12LL from UTC(Unisonic Tech), in a TO-252. 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 input voltage to the regulator; the absolute maximum input voltage is 35 V and bypass capacitors should be placed as close to the regulator as possible. |
| 2 | GND | power_in | Ground (common) reference pin for the regulator, shared between input and output. |
| 3 | OUTPUT | power_out | Regulated 12 V output, rated for output current up to 0.5 A (peak output current 1.2 A). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC(Unisonic Tech) |
| Package | TO-252 |
| 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 | VOUT | 11.52 | 12 | 12.48 | V | IOUT=5mA~0.5A | 6 |
| Output Voltage | VOUT | 11.4 | 12.6 | V | VIN =14.5 |
6 | |
| Load Regulation | ΔVOUT | 120 | mV | IOUT=5mA~0.5A | 6 | ||
| Load Regulation | ΔVOUT | 60 | mV | IOUT=5mA~200mA | 6 | ||
| Line Regulation | ΔVOUT | 120 | mV | VIN=14.5~30V | 6 | ||
| Quiescent Current | IQ | 8 | mA | IOUT=0.5A | 6 | ||
| Quiescent Current Change | ΔIQ | 1 | mA | VIN =14.5~30V | 6 | ||
| Quiescent Current Change | ΔIQ | 0.5 | mA | IOUT=5mA~0.5A | 6 | ||
| Output Noise Voltage | eN | 75 | μV | 10Hz≤f≤100kHz | 6 | ||
| Ripple Rejection | RR | 52 | 72 | dB | VIN =15~25V, f=120Hz | 6 | |
| Peak Output Current | IPEAK | 1.2 | A | 6 | |||
| Short-Circuit Current | ISC | 250 | mA | VIN=VOUT+19V | 6 | ||
| Dropout Voltage | VD | 2 | V | 6 | |||
| Input Voltage | VIN | 35 | V | 4 | |||
| Output Current | IOUT | 0.5 | A | 4 | |||
| Operating Junction Temperature | TJ | 150 | °C | 4 | |||
| Operating Temperature | TOPR | -40 | 125 | °C | 4 | ||
| Storage Temperature | TSTG | -65 | 150 | °C | 4 |
CAD (KiCad official)
- Symbol:
78D12LL - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
78d12ll-etched.step/78d12ll-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);78d12ll.step/78d12ll.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC(Unisonic Tech) datasheet (10 pp, sha256
a771b5444db5f76c, retrieved 2026-10-29, tier: manufacturer) - 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).