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LM1117S-ADJ
Public Made by Adomby adom
HTC Korea TAEJIN Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, 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
markdownLM1117S-ADJ
HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
LM1117S-ADJ from HTC Korea TAEJIN 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/GND | passive | Adjustment/ground terminal: in the ADJ version it sets the output voltage through an external divider, with adjust pin current of 50 µA typ and 120 µA max (page 5). |
| 2 | VOUT | power_out | Regulated output: delivers up to 1 A with dropout of 1.2 V typ at 1 A, and requires an output capacitor of 10 µF or larger for stability. |
| 3 | VIN | power_in | Unregulated input: absolute maximum DC input voltage is 20 V, and electrical characteristics are specified for an operating input voltage up to 12 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| Package | SOT-223 |
| 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 | VREF | 1.238 | 1.25 | 1.262 | V | VIN=5V, IO=10mA | 5 |
| Reference Voltage | VREF | 1.219 | 1.281 | V | IO = 10mA to 1A, VIN - VREF = 1.5V to 13.75V (TJ = 0 ~ 125℃) | 5 | |
| Dropout Voltage | VD | 1 | 1.1 | V | IO = 100mA | 9 | |
| Dropout Voltage | VD | 1.1 | 1.2 | V | IO = 500mA | 9 | |
| Dropout Voltage | VD | 1.2 | 1.3 | V | IO = 1A | 9 | |
| Line Regulation | ΔVLINE | 0.1 | 0.2 | % | IO = 10mA, VIN - VREF = 1.5V to 12V | 5 | |
| Load Regulation | ΔVLOAD | 0.2 | 0.4 | % | IO = 10mA to 1A, VIN - VREF = 2 V | 5 | |
| Operating Input Voltage | VIN | 12 | V | 5 | |||
| Adjustment Pin Current | IADJ | 50 | 120 | uA | VIN - VREF = 1.5V to 12V, IO = 100mA | 5 | |
| Adjustment Pin Current Change | ΔIADJ | 0.5 | 5 | uA | VIN - VREF = 1.5V to 12V, IO = 100mA to 1A | 5 | |
| Minimum Load Current | IO(MIN) | 5 | 10 | mA | VIN=5V, VREF=0V | 5 | |
| Current Limit | IO | 1000 | 1250 | 1600 | mA | VIN - VREF = 5V | 5 |
| Supply Voltage Rejection | SVR | 60 | 75 | dB | IO = 1A, f = 120Hz, VIN - VREF = 3V, VRIPPLE = 1VPP | 5 | |
| DC Input Voltage | VIN | 20 | V | TA = 25℃ | 1 | ||
| Lead Temperature (Soldering, 5 seconds) | TSOL | 260 | ℃ | TA = 25℃, 5 seconds soldering | 1 | ||
| Operating Junction Temperature Range | TOPR | -40 | 125 | ℃ | TA = 25℃ | 1 | |
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | TA = 25℃ | 1 | |
| Thermal Resistance Junction-To-Ambient / SOT-223 | θJA-SOT-223 | 137 | °C/W | No heat sink / No air flow / No adjacent heat source / 0.066 inch² copper area, TA=25°C | 12 |
CAD (KiCad official)
- Symbol:
LM1117S-ADJ - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
lm1117s-adj-etched.step/lm1117s-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm1117s-adj.step/lm1117s-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTC Korea TAEJIN Tech datasheet (12 pp, sha256
44a7a7aa0771cacd, retrieved 2026-10-18, 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).