component
LM317AMDT
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.
main
LM317AMDT
HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
LM317AMDT 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 | ADJUST | passive | Adjustment terminal (调节); the device holds the adjust current Iadj below 100 µA and constant, so the output voltage is set by the external resistor divider returned to this pin. |
| 2 | VOUT | power_out | Regulated output (输出) of the 1.2 V to 37 V adjustable regulator, rated up to 1.5 A maximum output current. |
| 3 | Vin | power_in | Unregulated input supply (输入电源); the input-to-output differential must stay within 40 V (VI-VO 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 (set of rows as printed, variant not labeled) | Vref | 1.238 | 1.25 | 1.262 | V | 3V≤(VIN−VOUT)≤40V, 10mA≤IOUT≤IMAX, P≤PMAX | 3 |
| Reference voltage (second row, wider range) | Vref | 1.2 | 1.25 | 1.3 | V | 3V≤(VIN−VOUT)≤40V, 10mA≤IOUT≤IMAX, P≤PMAX | 3 |
| Line regulation | Regline | 0.01 | 0.04 | %/V | 3V≤(VIN−VOUT)≤40V | 3 | |
| Line regulation (second row) | Regline | 0.01 | 0.07 | %/V | 3V≤(VIN−VOUT)≤40V | 3 | |
| Load regulation | Regload | 0.1 | 0.5 | % | 10 mA≤IOUT≤IMAX | 3 | |
| Load regulation (second row) | Regload | 0.3 | 1.5 | % | 10 mA≤IOUT≤IMAX | 3 | |
| Thermal regulation | Reftherm | 0.04 | 0.07 | %/W | 3 | ||
| Adjust pin current | IAdj | 50 | 100 | μA | 3 | ||
| Adjust pin current change | ΔIAdj | 0.2 | 5 | μA | 3V≤(VIN−VOUT)≤40V, 10mA≤IOUT≤IMAX | 3 | |
| Minimum load current to maintain regulation | ILmin | 3.5 | 10 | mA | (VIN−VOUT)=40V | 3 | |
| Maximum output current | Imax | 1 | 1.95 | A | (VIN−VOUT)≤15V, T package | 3 | |
| Ripple rejection | RR | 66 | 80 | dB | VOUT=10V, f=12 Hz, CADJ=10 μF | 3 | |
| Input-output voltage differential | VI-VO | 40 | V | 3 | |||
| Output current | IOUT | 1.5 | A | 3 | |||
| Operating junction temperature | TJ | -40 | 125 | °C | 3 | ||
| Storage temperature | TS | -65 | 150 | °C | 3 | ||
| Operating temperature (LM317A grade) | TA | -40 | 85 | °C | LM317A | 3 | |
| Lead temperature (soldering 10 s), TO-252/SOT223 | TLEAD | 260 | °C | TO-252/SOT223, soldering 10 s | 3 |
CAD (KiCad official)
- Symbol:
LM317AMDT - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files:
lm317amdt-etched.step/lm317amdt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317amdt.step/lm317amdt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (10 pp, sha256
d9a555a6ac04206b, 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-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).
# LM317AMDT
**HGSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
LM317AMDT 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 | ADJUST | passive | Adjustment terminal (调节); the device holds the adjust current Iadj below 100 µA and constant, so the output voltage is set by the external resistor divider returned to this pin. |
| 2 | VOUT | power_out | Regulated output (输出) of the 1.2 V to 37 V adjustable regulator, rated up to 1.5 A maximum output current. |
| 3 | Vin | power_in | Unregulated input supply (输入电源); the input-to-output differential must stay within 40 V (VI-VO 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 (set of rows as printed, variant not labeled) | Vref | 1.238 | 1.25 | 1.262 | V | 3V≤(VIN−VOUT)≤40V, 10mA≤IOUT≤IMAX, P≤PMAX | 3 |
| Reference voltage (second row, wider range) | Vref | 1.2 | 1.25 | 1.3 | V | 3V≤(VIN−VOUT)≤40V, 10mA≤IOUT≤IMAX, P≤PMAX | 3 |
| Line regulation | Regline | | 0.01 | 0.04 | %/V | 3V≤(VIN−VOUT)≤40V | 3 |
| Line regulation (second row) | Regline | | 0.01 | 0.07 | %/V | 3V≤(VIN−VOUT)≤40V | 3 |
| Load regulation | Regload | | 0.1 | 0.5 | % | 10 mA≤IOUT≤IMAX | 3 |
| Load regulation (second row) | Regload | | 0.3 | 1.5 | % | 10 mA≤IOUT≤IMAX | 3 |
| Thermal regulation | Reftherm | | 0.04 | 0.07 | %/W | | 3 |
| Adjust pin current | IAdj | | 50 | 100 | μA | | 3 |
| Adjust pin current change | ΔIAdj | | 0.2 | 5 | μA | 3V≤(VIN−VOUT)≤40V, 10mA≤IOUT≤IMAX | 3 |
| Minimum load current to maintain regulation | ILmin | | 3.5 | 10 | mA | (VIN−VOUT)=40V | 3 |
| Maximum output current | Imax | 1 | 1.95 | | A | (VIN−VOUT)≤15V, T package | 3 |
| Ripple rejection | RR | 66 | 80 | | dB | VOUT=10V, f=12 Hz, CADJ=10 μF | 3 |
| Input-output voltage differential | VI-VO | | | 40 | V | | 3 |
| Output current | IOUT | | | 1.5 | A | | 3 |
| Operating junction temperature | TJ | -40 | | 125 | °C | | 3 |
| Storage temperature | TS | -65 | | 150 | °C | | 3 |
| Operating temperature (LM317A grade) | TA | -40 | | 85 | °C | LM317A | 3 |
| Lead temperature (soldering 10 s), TO-252/SOT223 | TLEAD | | | 260 | °C | TO-252/SOT223, soldering 10 s | 3 |
## CAD (KiCad official)
- Symbol: `LM317AMDT`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files: `lm317amdt-etched.step` / `lm317amdt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm317amdt.step` / `lm317amdt.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756671926695800832) (10 pp, sha256 `d9a555a6ac04206b`, 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-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/lm317amdt-datasheet.pdf)