component
78T05AL-TQ2-R
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263. 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
markdown78T05AL-TQ2-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263
78T05AL-TQ2-R from UTC Unisonic Tech, in a TO-263. 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 supply pin; the datasheet's absolute maximum input voltage is 35 V, and a 0.33 µF input bypass capacitor is recommended as close to the regulator as possible. |
| 2 | GND | power_in | Common ground reference pin for the regulator. |
| 3 | OUTPUT | power_out | Regulated 5 V output pin, rated for a peak output current of up to 1 A, with a 0.1 µF output bypass capacitor recommended close to the regulator. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | TO-263 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 35 | V | 4 | |||
| Output Current | IOUT | 1 | A | 4 | |||
| Junction Temperature | TJ | 125 | °C | 4 | |||
| Operating Junction Temperature | TOPR | -40 | 85 | °C | 4 | ||
| Storage Temperature | TSTG | -40 | 150 | °C | 4 | ||
| Output Voltage | VOUT | 4.8 | 5 | 5.2 | V | TJ=25°C, IOUT=5mA - 1.0A | 4 |
| Output Voltage | VOUT | 4.75 | 5.25 | V | VIN=7.5V~20V, IOUT=5mA-1.0A, PD≦15W | 4 | |
| Ripple Rejection | RR | 62 | 80 | dB | VIN=8V-18V, f=120Hz, TJ=25°C | 4 | |
| Load Regulation | ΔVOUT | 50 | mV | TJ=25°C, IOUT=5mA-1.0A | 4 | ||
| Load Regulation | ΔVOUT | 25 | mV | TJ=25°C, IOUT=0.25A-0.75A | 4 | ||
| Line Regulation | ΔVOUT | 50 | mV | VIN=7V~25V, TJ=25°C | 4 | ||
| Quiescent Current | IQ | 8 | mA | TJ=25°C, IOUT≦1.0A | 4 | ||
| Quiescent Current Change | ΔIQ | 1 | mA | VIN=7.5V~20V | 4 | ||
| Quiescent Current Change | ΔIQ | 0.5 | mA | IOUT=5mA-1.0A | 4 | ||
| Output Noise Voltage | eN | 40 | μV | 10Hz ≦ f ≦ 100kHz | 4 | ||
| Dropout Voltage | VD | 2 | V | TJ=25°C | 4 | ||
| Peak Output Current | IPEAK | 1.8 | A | TJ=25°C | 4 | ||
| Short-Circuit Current | ISC | 250 | mA | VIN=35V, TJ=25°C | 4 | ||
| Temperature coefficient of Vo | ΔVo/ΔT | -0.6 | mV/°C | IOUT=5mA | 4 |
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 represents pulse test conditio | 7 |
CAD (KiCad official)
- Symbol:
78T05AL-TQ2-R - Footprint:
Package_TO_SOT_SMD:TO-263-2 - 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files:
78t05al-tq2-r-etched.step/78t05al-tq2-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);78t05al-tq2-r.step/78t05al-tq2-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (9 pp, sha256
2184fe2fda617fbc, 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).