component
LM317K-TN3-R
Public Made by Adomby adom
UTC(Unisonic Tech) Linear Voltage Regulators (LDO), TO-252-2(DPAK). 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
markdownLM317K-TN3-R
UTC(Unisonic Tech) · Linear Voltage Regulators (LDO) · TO-252-2(DPAK)
LM317K-TN3-R from UTC(Unisonic Tech), in a TO-252-2(DPAK). 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 | input | Adjust pin; reference voltage VREF is 1.20V min, 1.25V typ, 1.30V max, with adjustable pin current typically 50μA (100μA max). |
| 2 | VOUT | power_out | Regulated output (1.3V to 37V adjustable) supplying output current in excess of 1A with internal short circuit protection. |
| 3 | VIN | power_in | Unregulated input; input-output voltage difference must not exceed 40V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC(Unisonic Tech) |
| Package | TO-252-2(DPAK) |
| 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 | TA=25C | 3 | ||
| Junction Temperature | TJ | 125 | C | TA=25C | 3 | ||
| Operating Temperature | TOPR | -40 | 85 | C | TA=25C | 3 | |
| Storage Temperature | TSTG | -40 | 150 | C | TA=25C | 3 | |
| Junction-to-Ambient Thermal Resistance (TO-252) | θJA | 112 | C/W | TO-252 | 3 | ||
| Junction-to-Case Thermal Resistance (TO-252) | θJC | 12 | C/W | TO-252 | 3 | ||
| Reference Voltage | VREF | 1.2 | 1.25 | 1.3 | V | 3V≦VIN-VOUT≦40V, 10mA≦IOUT≦1A, PD≦20W | 3 |
| Line Regulation | ΔVOUT/VOUT | 0.01 | 0.04 | %/V | 3V≦VIN-VOUT≦40V | 3 | |
| Load Regulation (VOUT≦5V) | ΔVOUT | 5 | 25 | mV | 10mA≦IOUT≦1A, VOUT≦5V | 3 | |
| Load Regulation (VOUT≧5V) | ΔVOUT | 0.1 | 0.5 | % | 10mA≦IOUT≦1A, VOUT≧5V | 3 | |
| Adjustable Pin Current | IADJ | 50 | 100 | μA | 3 | ||
| Adjustable Pin Current Change | ΔIADJ | 0.2 | 5 | μA | 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 (CADJ=10μF) | RR | 66 | 80 | dB | VOUT=10V, f=120HZ, CADJ=10μF | 3 | |
| Ripple Rejection (CADJ=0) | 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 |
CAD (KiCad official)
- Symbol:
LM317K-TN3-R - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
- 3D model files:
lm317k-tn3-r-etched.step/lm317k-tn3-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317k-tn3-r.step/lm317k-tn3-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
d1e5cdda23317d13, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).