component
LM317G-AA3-R
Public Made by Adomby adom
UTC(Unisonic Tech) Linear Voltage Regulators (LDO), SOT-223. 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
markdownLM317G-AA3-R
UTC(Unisonic Tech) · Linear Voltage Regulators (LDO) · SOT-223
LM317G-AA3-R from UTC(Unisonic Tech), in a SOT-223. 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 | passive | Adjust pin sets the output voltage (1.3V to 37V); its current IADJ is 50 µA typical and 100 µA maximum, and CADJ is connected between this pin and ground. |
| 2 | VOUT | power_out | Regulated output, adjustable from 1.3V to 37V, with output current in excess of 1A; maximum output current is 0.2 A to 0.3 A at VIN-VOUT=40V with PD≤20W. |
| 3 | VIN | power_in | Unregulated input; the input-output voltage difference VIN-VOUT must not exceed 40V (absolute maximum). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC(Unisonic Tech) |
| Package | SOT-223 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Input - Output Voltage Difference | VIN-VOUT | 40 | V | 3 | |||
| Junction Temperature | TJ | 125 | C | 3 | |||
| Operating Temperature | TOPR | -40 | 85 | C | 3 | ||
| Storage Temperature | TSTG | -40 | 150 | C | 3 | ||
| Line Regulation | VOUT/VOUT | 0.01 | 0.04 | %/V | 3V≦VIN-VOUT≦40V | 3 | |
| Line Regulation | VOUT | 5 | 25 | mV | VOUT≦5V | 3 | |
| Load Regulation | VOUT | 0.1 | 0.5 | % | 10mA≦IOUT≦1A, VOUT≧5V | 3 | |
| Adjustable Pin Current | IADJ | 50 | 100 | μA | 3 | ||
| Adjustable Pin Current Change | IADJ | 0.2 | 5 | μA | 3V≦VIN-VOUT≦40V, 10mA≦IOUT≦1A, PD≦20W | 3 | |
| Reference Voltage | VREF | 1.2 | 1.25 | 1.3 | V | 3V≦VIN-VOUT≦40V, 10mA≦IOUT≦1A, PD≦20W | 3 |
| Minimum Load Current for Regulation | IL(MIN) | 3.5 | 10 | mA | VIN-VOUT=40V | 3 | |
| Maximum Output Current | IO(MAX) | 0.2 | 0.3 | A | VIN-VOUT=40V, PD≦20W | 3 | |
| Ripple Rejection | RR | 66 | 80 | dB | VOUT=10V,f=120HZ CADJ=10μF | 3 | |
| Ripple Rejection | RR | 65 | dB | VOUT=10V,f=120HZ CADJ=0 | 3 | ||
| Temperature Stability | 0.7 | %/VOUT | TMIN≦TJ≦TMAX | 3 | |||
| RMS Noise vs. % of VOUT | eN | 0.003 | %/VOUT | 10HZ≦f≦10KHZ | 3 | ||
| Junction-to-Ambient Thermal Resistance (SOT-223) | θJA | 165 | C/W | 3 | |||
| Junction-to-Case Thermal Resistance (SOT-223) | θJC | 23 | C/W | 3 |
CAD (KiCad official)
- Symbol:
LM317G-AA3-R - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
lm317g-aa3-r-etched.step/lm317g-aa3-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317g-aa3-r.step/lm317g-aa3-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
14286ff814b58d10, retrieved 2026-10-22, tier: manufacturer) - 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).