component
LM1117MDT-3.3
Public Made by Adomby adom
HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, 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
markdownLM1117MDT-3.3
HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252
LM1117MDT-3.3 from HGSEMI, 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 | GND/ADJ | power_in | Ground pin for the fixed-output version (this 3.3 V part); on the adjustable version this pin is the ADJ pin, with adjust current of 60 to 120 µA typical per the electrical characteristics. |
| 2 | VOUT | power_out | Regulated output voltage; 3.3 V nominal for LM1117-3.3, with 2% accuracy for fixed-voltage versions and 1.2 V dropout at 1 A. |
| 3 | VIN | power_in | Unregulated input supply; recommended input voltage is 15 V maximum and the absolute maximum input voltage is 20 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-252 |
| 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 (LM1117-3.3, 25°C pair, IOUT=10mA) | VOUT | 3.267 | 3.3 | 3.333 | V | IOUT=10mA, VIN=5V, TJ=25℃ | 4 |
| Output voltage (LM1117-3.3, full range) | VOUT | 3.235 | 3.3 | 3.365 | V | IOUT=10mA, VIN=5V,TJ=25℃, 0≤IOUT≤1A, 4.75V≤VIN≤10V | 4 |
| Input voltage | VIN | 20 | V | 3 | |||
| Storage temperature | TSTG | -65 | 150 | °C | 3 | ||
| Operating junction temperature range (absolute maximum table) | TJ | 150 | °C | 3 | |||
| Lead temperature (soldering 10 s) | TLEAD | 260 | °C | Soldering 10 s, TO-252/SOP-8/DFN package | 3 | ||
| ESD capability | ESD | 2000 | V | Minimum value as printed | 3 | ||
| Input voltage (recommended) | VIN | 15 | V | 4 | |||
| Operating junction temperature range (recommended) | TJ | -40 | 125 | ℃ | 4 | ||
| Line regulation | Rline | 3 | 7 | mV | VINMIN ≤VIN≤ 12V, VOUT=Fixed/Adj, IOUT=10mA | 4 | |
| Load regulation | Rload | 6 | 12 | mV | 10mA≤IOUT≤ 1A, VOUT=Fixed/Adj | 4 | |
| Dropout voltage at 100mA | Vdrop | 1 | 1.2 | V | IOUT=100mA | 4 | |
| Dropout voltage at 500mA | Vdrop | 1.05 | 1.25 | V | IOUT=500mA | 4 | |
| Dropout voltage at 1A | Vdrop | 1.1 | 1.3 | V | IOUT=1A | 4 | |
| Quiescent current | Iq | 5 | 10 | mA | 4.25V≤VIN≤ 6.5V | 4 | |
| Ripple rejection | PSRR | 60 | 75 | dB | fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP | 4 | |
| Adjust pin current | Iadj | 60 | 120 | µA | 4 | ||
| Adjust pin current change | Iadj | 0.2 | 5 | µA | 0≤ IOUT≤1A, 1.4V ≤VIN-VOUT≤10V | 4 | |
| Current limit | Ilimit | 1.2 | 1.4 | 1.5 | A | 4 | |
| Thermal resistance junction-to-ambient (no heatsink) | θJA | 100 | ℃/W | TO-252-2, 无散热片 (no heatsink) | 4 |
CAD (KiCad official)
- Symbol:
LM1117MDT-3.3 - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
lm1117mdt-3-3-etched.step/lm1117mdt-3-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm1117mdt-3-3.step/lm1117mdt-3-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (12 pp, sha256
2486968a9dcfb2fd, retrieved 2026-10-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).