component
LM1084IDT-ADJ
Public Made by Adomby adom
HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM1084IDT-ADJ
HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
LM1084IDT-ADJ from HGSEMI, in a TO-252-2. 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 | ADJ/GND | passive | Ground/adjust pin (datasheet lists GND/ADJ, I/O G/O); on the adjustable LM1084-ADJ it is the ADJ reference pin that sets VOUT = VREF×(1+R2/R1)+IADJ×R2 with VREF 1.250 V typ. |
| 2 | VOUT | power_out | Regulated output voltage pin, internally connected to the metal tab, requiring at least a 22 µF tantalum output capacitor for stability; 5 A output current with 1.5 V typical dropout. |
| 3 | VIN | power_in | Input supply voltage pin with absolute maximum 20 V and recommended 12 V maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-252-2 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference voltage (ADJ), 10mA to 5A | VREF | 1.231 | 1.25 | 1.269 | V | IOUT=10mA, VIN-VOUT=3V | 3 |
| Reference voltage (ADJ), full load and line range | VREF | 1.225 | 1.25 | 1.275 | V | 10mA≤IOUT≤5A, 1.5V≤VIN-VOUT≤5V | 3 |
| Line regulation (ADJ) | ΔVOUT | 0.015 | 0.2 | % | IOUT=10mA, 2.85V≤VIN≤10V | 4 | |
| Load regulation (ADJ) | ΔVOUT | 0.1 | 0.4 | % | 0mA≤IOUT≤5A, VIN-VOUT=3V | 4 | |
| Dropout voltage | VDROP | 1.45 | 1.5 | V | IOUT=5A, ΔVREF, ΔVOUT=1% | 4 | |
| Current limit | ILIMIT | 5.5 | 6.5 | A | VIN-VOUT=3V | 4 | |
| Minimum load current (ADJ) | ILOAD(MIN) | 3 | 10 | mA | VIN=10V (LM1084-ADJ) | 4 | |
| Quiescent current | IQ | 5 | 10 | mA | VIN=10V (LM1084) | 4 | |
| Ripple rejection | PSRR | 60 | 72 | dB | fRIPPLE=120Hz, COUT=25μF 钽电容, IOUT=5A, VIN-VOUT=3V | 4 | |
| Adjust pin current | IADJ | 55 | 120 | μA | VIN=4.25V, IOUT=10mA | 4 | |
| Adjust pin current change | ΔIADJ | 0.2 | 5 | μA | 10mA≤IOUT≤5A, 1.5V≤(VIN-VOUT)≤4.5V | 4 | |
| Lead temperature (soldering 10 s), TO-252 | TLEAD | 260 | ℃ | Soldering 10 s, TO-252 | 3 | ||
| Input voltage (absolute maximum) | VIN | 20 | V | 3 | |||
| Operating junction temperature range (absolute maximum) | TJ | 150 | ℃ | 3 | |||
| Storage temperature | TS | -65 | 150 | V | 3 | ||
| ESD capability (minimum) | ESD | 2000 | V | 3 | |||
| Input voltage (recommended) | VIN | 12 | V | 3 | |||
| Operating junction temperature range (recommended), TO-252 | TJ | -40 | 85 | ℃ | TO-252 | 3 | |
| Thermal resistance junction-to-ambient, TO-252-2L | θJA | 100 | ℃/W | TO-252-2L | 4 | ||
| Temperature stability | 0.5 | % | IOUT=10mA, VIN-VOUT=1.5V | 4 | |||
| Long-term stability | 0.5 | % | Tamb=125°C, 1000Hrs | 4 | |||
| RMS noise (% of VOUT) | 0.003 | % | 10Hz≤f≤10kHz | 4 |
CAD (KiCad official)
- Symbol:
LM1084IDT-ADJ - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files:
lm1084idt-adj-etched.step/lm1084idt-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm1084idt-adj.step/lm1084idt-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (11 pp, sha256
8ced581695e85829, retrieved 2026-10-18, 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-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).
# LM1084IDT-ADJ
**HGSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
LM1084IDT-ADJ from HGSEMI, in a TO-252-2. 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 | ADJ/GND | passive | Ground/adjust pin (datasheet lists GND/ADJ, I/O G/O); on the adjustable LM1084-ADJ it is the ADJ reference pin that sets VOUT = VREF×(1+R2/R1)+IADJ×R2 with VREF 1.250 V typ. |
| 2 | VOUT | power_out | Regulated output voltage pin, internally connected to the metal tab, requiring at least a 22 µF tantalum output capacitor for stability; 5 A output current with 1.5 V typical dropout. |
| 3 | VIN | power_in | Input supply voltage pin with absolute maximum 20 V and recommended 12 V maximum. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-252-2 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference voltage (ADJ), 10mA to 5A | VREF | 1.231 | 1.25 | 1.269 | V | IOUT=10mA, VIN-VOUT=3V | 3 |
| Reference voltage (ADJ), full load and line range | VREF | 1.225 | 1.25 | 1.275 | V | 10mA≤IOUT≤5A, 1.5V≤VIN-VOUT≤5V | 3 |
| Line regulation (ADJ) | ΔVOUT | | 0.015 | 0.2 | % | IOUT=10mA, 2.85V≤VIN≤10V | 4 |
| Load regulation (ADJ) | ΔVOUT | | 0.1 | 0.4 | % | 0mA≤IOUT≤5A, VIN-VOUT=3V | 4 |
| Dropout voltage | VDROP | | 1.45 | 1.5 | V | IOUT=5A, ΔVREF, ΔVOUT=1% | 4 |
| Current limit | ILIMIT | | 5.5 | 6.5 | A | VIN-VOUT=3V | 4 |
| Minimum load current (ADJ) | ILOAD(MIN) | | 3 | 10 | mA | VIN=10V (LM1084-ADJ) | 4 |
| Quiescent current | IQ | | 5 | 10 | mA | VIN=10V (LM1084) | 4 |
| Ripple rejection | PSRR | | 60 | 72 | dB | fRIPPLE=120Hz, COUT=25μF 钽电容, IOUT=5A, VIN-VOUT=3V | 4 |
| Adjust pin current | IADJ | | 55 | 120 | μA | VIN=4.25V, IOUT=10mA | 4 |
| Adjust pin current change | ΔIADJ | | 0.2 | 5 | μA | 10mA≤IOUT≤5A, 1.5V≤(VIN-VOUT)≤4.5V | 4 |
| Lead temperature (soldering 10 s), TO-252 | TLEAD | | | 260 | ℃ | Soldering 10 s, TO-252 | 3 |
| Input voltage (absolute maximum) | VIN | | | 20 | V | | 3 |
| Operating junction temperature range (absolute maximum) | TJ | | | 150 | ℃ | | 3 |
| Storage temperature | TS | -65 | | 150 | V | | 3 |
| ESD capability (minimum) | ESD | 2000 | | | V | | 3 |
| Input voltage (recommended) | VIN | | | 12 | V | | 3 |
| Operating junction temperature range (recommended), TO-252 | TJ | -40 | | 85 | ℃ | TO-252 | 3 |
| Thermal resistance junction-to-ambient, TO-252-2L | θJA | | 100 | | ℃/W | TO-252-2L | 4 |
| Temperature stability | | | 0.5 | | % | IOUT=10mA, VIN-VOUT=1.5V | 4 |
| Long-term stability | | | 0.5 | | % | Tamb=125°C, 1000Hrs | 4 |
| RMS noise (% of VOUT) | | | 0.003 | | % | 10Hz≤f≤10kHz | 4 |
## CAD (KiCad official)
- Symbol: `LM1084IDT-ADJ`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files: `lm1084idt-adj-etched.step` / `lm1084idt-adj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm1084idt-adj.step` / `lm1084idt-adj.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HGSEMI datasheet](docs/lm1084idt-adj-datasheet.pdf) (11 pp, sha256 `8ced581695e85829`, retrieved 2026-10-18, 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`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).
[Datasheet PDF](docs/lm1084idt-adj-datasheet.pdf)