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78L12MG-AB3-R
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. 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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Contents
README
markdown78L12MG-AB3-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
78L12MG-AB3-R from UTC Unisonic Tech, in a SOT-89. 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 12 V output, rated for up to 200 mA output current, with 11.40 V to 12.60 V output at 1 mA to 40 mA over a 14.5 V to 27 V input. |
| 2 | GND | power_in | Ground pin, the common reference for the regulator. |
| 3 | INPUT | power_in | Unregulated input voltage, with an absolute maximum of 35 V for the 10 V to 24 V output versions (which includes the 12 V version), and a 0.33 µF input bypass capacitor (C1) recommended as close to the regulator as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-89 |
| 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 | 11.52 | 12 | 12.48 | V | TJ=25°C | 5 |
| Output Voltage | VOUT | 11.4 | 12.6 | V | 14.5V≦VIN≦27V,IOUT=1mA ~ 40mA | 5 | |
| Load Regulation | VOUT | 25 | 100 | mV | TJ=25°C, IOUT=1mA ~ 100mA | 5 | |
| Load Regulation | VOUT | 12 | 50 | mV | TJ=25°C, IOUT=1mA ~ 40mA | 5 | |
| Line Regulation | VOUT | 25 | 300 | mV | 14.5V≦VIN≦27V,TJ=25°C | 5 | |
| Line Regulation | VOUT | 20 | 250 | mV | 16V≦VIN≦27V,TJ=25°C | 5 | |
| Quiescent Current | IQ | 2 | 6.5 | mA | 5 | ||
| Quiescent Current Change | IQ | 1.5 | mA | 16V≦VIN≦27V | 5 | ||
| Quiescent Current Change | IQ | 0.1 | mA | 1mA≦VIN≦40mA | 5 | ||
| Output Noise Voltage | eN | 80 | μV | 10Hz≦f≦100kHz | 5 | ||
| Temperature Coefficient of VOUT | VO/T | -1 | mV/°C | IOUT=5mA | 5 | ||
| Ripple Rejection | RR | 45 | dB | 15V≦VIN≦25V, f=120Hz,TJ=25°C | 5 | ||
| Dropout Voltage | VD | 1.7 | V | TJ=25°C | 5 | ||
| Input Voltage | VIN | 35 | V | VOUT=10~24V | 3 | ||
| Output Current | IOUT | 200 | mA | 3 | |||
| Power Dissipation (SOT-89) | PD | 350 | mW | SOT-89 | 3 | ||
| Junction Temperature | TJ | 150 | °C | 3 | |||
| Storage Temperature | TSTG | -55 | 150 | °C | 3 | ||
| Ambient Operating Temperature | TOPR | -40 | 125 | °C | 3 | ||
| Junction Temperature Test Range | TJ | 0 | 125 | °C | Electrical characteristics table header (C1=0.33uF, CO=0.1uF, unless otherwise specified) | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | Note: 1. The Maximum steady state usable output current are dependent on input voltage, heat sinking, lead length of the package and copper pattern of PCB. The data above represent pulse test conditio | 6 |
CAD (KiCad official)
- Symbol:
78L12MG-AB3-R - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
78l12mg-ab3-r-etched.step/78l12mg-ab3-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);78l12mg-ab3-r.step/78l12mg-ab3-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (8 pp, sha256
7efe8f4bcde8758d, retrieved 2026-10-18, 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).