component
LM317LG-S08-R
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLM317LG-S08-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8
LM317LG-S08-R from UTC Unisonic Tech, in a SOIC-8. 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 | VIN | power_in | Unregulated input supply pin; the input-output differential voltage (VIN-VOUT) must not exceed the 40 V absolute maximum. |
| 2 | VOUT | power_out | Regulated output pin, rated for output current up to 100 mA with output adjustable from 1.25 V to 37 V. |
| 3 | VOUT | power_out | Regulated output pin, rated for output current up to 100 mA with output adjustable from 1.25 V to 37 V. |
| 4 | ADJ | passive | Adjust pin, where the 1.25 V reference is developed; adjust pin current IADJ is typically 50 µA and at most 100 µA, and an optional CADJ connects from this pin to ground. |
| 5 | NC | unconnected | No connection, as marked N in the ordering table pin assignment for SOP-8. |
| 6 | VOUT | power_out | Regulated output pin, rated for output current up to 100 mA with output adjustable from 1.25 V to 37 V. |
| 7 | VOUT | power_out | Regulated output pin, rated for output current up to 100 mA with output adjustable from 1.25 V to 37 V. |
| 8 | NC | unconnected | No connection, as marked N in the ordering table pin assignment for SOP-8. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
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 Differential Voltage | VIN-VOUT | 40 | V | 3 | |||
| Junction Temperature | TJ | 125 | C | 3 | |||
| Operating Junction Temperature | TOPR | -40 | 85 | C | 3 | ||
| Storage Temperature Range | TSTR | -40 | 150 | C | 3 | ||
| Line Regulation | VOUT/VOUT | 0.01 | 0.04 | %/V | 3V≦VIN-VOUT≦40V, ILOAD<20mA | 3 | |
| Load Regulation (VOUT≦5V) | VOUT | 5 | 25 | mV | 5mA≦IOUT≦100mA, VOUT≦5V | 3 | |
| Load Regulation (VOUT≧5V) | VOUT | 0.1 | 0.5 | % | 5mA≦IOUT≦100mA, VOUT≧5V | 3 | |
| Adjustable Pin Current | IADJ | 50 | 100 | μA | 3 | ||
| Adjustable Pin Current Change | IADJ | 0.2 | 5 | μA | 3V≦VIN-VOUT≦40V, 5mA≦IOUT≦100mA, PD＜625mW | 3 | |
| Reference Voltage | VREF | 1.2 | 1.25 | 1.3 | V | 3V≦VIN-VOUT≦40V, 5mA≦IOUT≦100mA, PD＜625mW | 3 |
| Minimum Load Current for Regulation | IL(MIN) | 3.5 | 10 | mA | VIN-VOUT=40V | 3 | |
| RMS Noise vs. % of VOUT | eN | 0.003 | 0.01 | %/VOUT | 10HZ≦f≦10KHZ | 3 | |
| Ripple Rejection (CADJ=10µF) | RR | 66 | 80 | dB | VOUT=10V, f=120HZ, CADJ=10F | 3 | |
| Temperature Stability | 0.7 | %/VOUT | TMIN≦TJ≦TMAX | 3 | |||
| Maximum Output Current | IO(MAX) | 15 | mA | VIN-VOUT<40V, PD<625mW | 3 | ||
| Ripple Rejection (CADJ=0) | RR | 65 | dB | CADJ=0 | 3 |
CAD (KiCad official)
- Symbol:
LM317LG-S08-R - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm317lg-s08-r-etched.step/lm317lg-s08-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317lg-s08-r.step/lm317lg-s08-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (5 pp, sha256
28d251dfd5958ec9, retrieved 2026-10-20, 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).