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LD1117AL-50-TA3-A-T
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. 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
markdownLD1117AL-50-TA3-A-T
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220
LD1117AL-50-TA3-A-T from UTC Unisonic Tech, in a TO-220. 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 | GND/ADJ | power_in | Ground reference pin (GND/ADJ), which is the adjust pin on the adjustable version; pin code A assigns G to pin 1. |
| 2 | VOUT | power_out | Regulated output voltage pin (5.0V fixed for the -50 version, 4.900 to 5.100V), with output current up to 1A for the 1117A. |
| 3 | VIN | power_in | Input voltage pin, with a recommended operating maximum of 15V and an absolute maximum of 18V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | TO-220 |
| 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 (VIN=7V, IOUT=10mA, TJ=25°C) | VOUT | 4.9 | 5 | 5.1 | V | VIN=7V, IOUT=10mA, TJ=25°C | 9 |
| Output Voltage (line/load range) | VOUT | 4.9 | 5 | 5.1 | V | VIN=6.5 to 15V; LD1117A: IOUT=0~1.0A | 9 |
| Line Regulation | VOUT | 1 | 10 | mV | VIN=6.5 to 15V, IOUT=0mA | 9 | |
| Load Regulation | VOUT | 1 | 15 | mV | VIN=6.5V; LD1117A: IOUT=0~1000mA | 9 | |
| Quiescent Current | IQ | 5 | 10 | mA | VIN15V | 9 | |
| Minimum Load Current | IO(MIN) | 2 | 5 | mA | VIN=15V | 9 | |
| Supply Voltage Rejection | SVR | 60 | 75 | dB | IOUT=40mA, f=120Hz, TJ=25°C, VIN=8V, VRIPPLE=1VPP | 9 | |
| Dropout Voltage | VD | 1 | 1.1 | V | IOUT=100mA | 9 | |
| Dropout Voltage | VD | 1.15 | 1.25 | V | IOUT=500mA | 9 | |
| Dropout Voltage | VD | 1.2 | 1.3 | V | IOUT=800mA | 9 | |
| Thermal Regulation | 0.01 | 0.1 | %/W | TA=25°C, 30ms Pulse | 9 | ||
| DC Input Voltage (absolute maximum) | VIN | 18 | V | 4 | |||
| Junction Temperature (absolute maximum) | TJ | 150 | °C | 4 | |||
| Operating Temperature | TOPR | -20 | 125 | °C | Note 2: determined from design only, not 100% tested | 4 | |
| Storage Temperature | TSTG | -65 | 150 | °C | 4 | ||
| Input Voltage (recommended operating) | VIN | 15 | V | 4 | |||
| Operating Junction Temperature (recommended) | TJ | -20 | 125 | °C | 4 | ||
| Junction to Ambient, TO-220 | θJA | 54 | °C/W | TO-220 package | 4 | ||
| Junction to Case, TO-220 | θJC | 4 | °C/W | TO-220/TO-262 package | 4 | ||
| Output Noise Voltage | eN | 100 | V | B=10Hz to 10KHz, TJ=25°C | 9 | ||
| Current Limit (LD1117A) | ILIMIT | 1000 | mA | VIN=10V, TJ=25°C | 9 | ||
| Temperature stability | VOUT | 0.5 | % | 9 | |||
| Long Term Stability | VOUT | 0.3 | % | 1000 hrs, TJ=125°C | 9 |
CAD (KiCad official)
- Symbol:
LD1117AL-50-TA3-A-T - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files:
ld1117al-50-ta3-a-t-etched.step/ld1117al-50-ta3-a-t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ld1117al-50-ta3-a-t.step/ld1117al-50-ta3-a-t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (15 pp, sha256
f7f26a117cb07dc2, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).