component
LM317MBSTT3G
Public Made by Adomby adom
onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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lm317mbstt3g: specified limits as data (metadata.characteristics, 21 rows from the datasheet)
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18d ago
LM317MBSTT3G
onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LM317MBSTT3G from onsemi, in a SOT-223-4. 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 across which the internal 1.25 V reference appears; adjust pin current is controlled to less than 100 µA, and an optional bypass capacitor to ground improves ripple rejection. |
| 2 | Vout | power_out | Regulated output terminal, adjustable from 1.2 V to 37 V and capable of supplying more than 500 mA; the heatsink surface is connected to this pin. |
| 3 | Vin | power_in | Unregulated input supply terminal; the input-to-output voltage differential must not exceed 40 V. |
| 4 | Heatsink tab | passive | Heatsink surface shown as terminal 4 in the case outline drawing, electrically connected to pin 2 (Vout). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
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-Output Voltage Differential | VI−VO | 40 | Vdc | 2 | |||
| Maximum Junction Temperature | TJMAX | 150 | °C | 2 | |||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Reference Voltage | Vref | 1.2 | 1.25 | 1.3 | V | 3.0 V ≤ VI − VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax | 2 |
| Load Regulation (VO ≤ 5.0 V) | Regload | 5 | 25 | mV | TA = 25°C, 10 mA ≤ IO ≤ 0.5 A, VO ≤ 5.0 V | 2 | |
| Load Regulation (VO ≥ 5.0 V) | Regload | 0.1 | 0.5 | % VO | TA = 25°C, 10 mA ≤ IO ≤ 0.5 A, VO ≥ 5.0 V | 2 | |
| Line Regulation | Regline | 0.01 | 0.04 | %/V | TA = 25°C, 3.0 V ≤ VI − VO ≤ 40 V | 2 | |
| Line Regulation | Regline | 0.02 | 0.07 | %/V | 3.0 V ≤ VI−VO ≤ 40 V | 2 | |
| Load Regulation (VO ≤ 5.0 V, over temperature) | Regload | 20 | 70 | mV | 10 mA ≤ IO ≤ 0.5 A, VO ≤ 5.0 V | 2 | |
| Load Regulation (VO ≥ 5.0 V, over temperature) | Regload | 0.3 | 1.5 | % VO | 10 mA ≤ IO ≤ 0.5 A, VO ≥ 5.0 V | 2 | |
| Adjustment Pin Current | IAdj | 50 | 100 | µA | 2 | ||
| Adjustment Pin Current Change | IAdj | 0.2 | 5 | µA | 2.5 V ≤ VI − VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax | 2 | |
| Maximum Output Current | Imax | 0.5 | 0.9 | A | VI − VO ≤ 15 V, PD ≤ Pmax | 2 | |
| Maximum Output Current | Imax | 0.15 | 0.25 | A | VI − VO = 40 V, PD ≤ Pmax, TA = 25°C | 2 | |
| Minimum Load Current to Maintain Regulation | ILmin | 3.5 | 10 | mA | VI − VO = 40 V | 2 | |
| Ripple Rejection with CAdj | RR | 65 | 80 | dB | VO = 10 V, f = 120 Hz, CAdj = 10 µF | 2 | |
| Long-Term Stability | S | 0.3 | 1 | %/1.0 kHrs. | TJ = Thigh; TA = 25°C for end-point measurements | 2 | |
| Thermal Resistance, Junction-to-Air (ST suffix, SOT-223) | θJA | 245 | °C/W | 2 | |||
| Thermal Resistance, Junction-to-Case (ST suffix, SOT-223) | θJC | 15 | °C/W | 2 | |||
| Operating Junction Temperature Range (LM317MB Tlow to Thigh) | TJ | -40 | 125 | °C | LM317MB: Tlow to Thigh = −40°C to +125°C | 2 | |
| Output Voltage Range | VO | 1.2 | 37 | V | 1 |
CAD (KiCad official)
- Symbol:
LM317MBSTT3G - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files:
lm317mbstt3g-etched.step/lm317mbstt3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317mbstt3g.step/lm317mbstt3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (14 pp, sha256
e5fe58e7a6060e1f, retrieved 2026-10-09, 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).
# LM317MBSTT3G
**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LM317MBSTT3G from onsemi, in a SOT-223-4. 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 across which the internal 1.25 V reference appears; adjust pin current is controlled to less than 100 µA, and an optional bypass capacitor to ground improves ripple rejection. |
| 2 | Vout | power_out | Regulated output terminal, adjustable from 1.2 V to 37 V and capable of supplying more than 500 mA; the heatsink surface is connected to this pin. |
| 3 | Vin | power_in | Unregulated input supply terminal; the input-to-output voltage differential must not exceed 40 V. |
| 4 | Heatsink tab | passive | Heatsink surface shown as terminal 4 in the case outline drawing, electrically connected to pin 2 (Vout). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
## 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-Output Voltage Differential | VI−VO | | | 40 | Vdc | | 2 |
| Maximum Junction Temperature | TJMAX | | | 150 | °C | | 2 |
| Storage Temperature Range | Tstg | -65 | | 150 | °C | | 2 |
| Reference Voltage | Vref | 1.2 | 1.25 | 1.3 | V | 3.0 V ≤ VI − VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax | 2 |
| Load Regulation (VO ≤ 5.0 V) | Regload | | 5 | 25 | mV | TA = 25°C, 10 mA ≤ IO ≤ 0.5 A, VO ≤ 5.0 V | 2 |
| Load Regulation (VO ≥ 5.0 V) | Regload | | 0.1 | 0.5 | % VO | TA = 25°C, 10 mA ≤ IO ≤ 0.5 A, VO ≥ 5.0 V | 2 |
| Line Regulation | Regline | | 0.01 | 0.04 | %/V | TA = 25°C, 3.0 V ≤ VI − VO ≤ 40 V | 2 |
| Line Regulation | Regline | | 0.02 | 0.07 | %/V | 3.0 V ≤ VI−VO ≤ 40 V | 2 |
| Load Regulation (VO ≤ 5.0 V, over temperature) | Regload | | 20 | 70 | mV | 10 mA ≤ IO ≤ 0.5 A, VO ≤ 5.0 V | 2 |
| Load Regulation (VO ≥ 5.0 V, over temperature) | Regload | | 0.3 | 1.5 | % VO | 10 mA ≤ IO ≤ 0.5 A, VO ≥ 5.0 V | 2 |
| Adjustment Pin Current | IAdj | | 50 | 100 | µA | | 2 |
| Adjustment Pin Current Change | IAdj | | 0.2 | 5 | µA | 2.5 V ≤ VI − VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax | 2 |
| Maximum Output Current | Imax | 0.5 | 0.9 | | A | VI − VO ≤ 15 V, PD ≤ Pmax | 2 |
| Maximum Output Current | Imax | 0.15 | 0.25 | | A | VI − VO = 40 V, PD ≤ Pmax, TA = 25°C | 2 |
| Minimum Load Current to Maintain Regulation | ILmin | | 3.5 | 10 | mA | VI − VO = 40 V | 2 |
| Ripple Rejection with CAdj | RR | 65 | 80 | | dB | VO = 10 V, f = 120 Hz, CAdj = 10 µF | 2 |
| Long-Term Stability | S | | 0.3 | 1 | %/1.0 kHrs. | TJ = Thigh; TA = 25°C for end-point measurements | 2 |
| Thermal Resistance, Junction-to-Air (ST suffix, SOT-223) | θJA | | | 245 | °C/W | | 2 |
| Thermal Resistance, Junction-to-Case (ST suffix, SOT-223) | θJC | | | 15 | °C/W | | 2 |
| Operating Junction Temperature Range (LM317MB Tlow to Thigh) | TJ | -40 | | 125 | °C | LM317MB: Tlow to Thigh = −40°C to +125°C | 2 |
| Output Voltage Range | VO | 1.2 | | 37 | V | | 1 |
## CAD (KiCad official)
- Symbol: `LM317MBSTT3G`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `lm317mbstt3g-etched.step` / `lm317mbstt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm317mbstt3g.step` / `lm317mbstt3g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586200285946007552) (14 pp, sha256 `e5fe58e7a6060e1f`, retrieved 2026-10-09, tier: lcsc)
- **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/lm317mbstt3g-datasheet.pdf)