component
AMS1117-1.8V
Public Made by Adomby adom
MSKSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout settled in review by an AI reviewer against the manufacturer's 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
markdownAMS1117-1.8V
MSKSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
AMS1117-1.8V from MSKSEMI, 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 | VSS/ADJ | power_in | Ground / common return pin. On the fixed 1.8V version (AMS1117-1.8V), pin 1 (labeled VSS/ADJ in the pinout table) functions as the device ground reference. Connect to system single-point ground. |
| 2 | VOUT | power_out | Regulated 1.8V output pin (1.764V min / 1.836V max, ±2%). Sources up to 1A of load current. Requires a 10uF tantalum output capacitor for stability. |
| 3 | VIN | power_in | Unregulated input supply pin. Operating range up to 15V (typ) / 18V (abs max); must be at least Vout + Vdropout (≥3.1V for the 1.8V fixed variant per electrical characteristics). Recommend 10uF tantalum bypass capacitor to GND. |
| 4 | VOUT | power_out | SOT-223 tab pin, electrically connected to VOUT (pin 2). Acts as the primary heatsinking pad; solder to a copper pour to reduce thermal resistance (θJC ≈ 20°C/W, dropping toward ~30°C/W total with a 5cm×5cm 2-side pour). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOT-223 |
| Category | 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 |
|---|---|---|---|---|---|---|---|
| Output voltage (AMS1117-1.8V) | VOUT | 1.764 | 1.8 | 1.836 | V | 0≤Iout≤1A, Vin=3.1V | 5 |
| Dropout voltage | Vdrop | 1.1 | 1.3 | V | Iout=100mA | 6 | |
| Dropout voltage | Vdrop | 1.3 | 1.5 | V | Iout=1A | 6 | |
| Line regulation (AMS1117-1.8V) | ΔVout | 5 | 32 | mV | Iout=10mA, 3.1V≤Vin≤12V | 5 | |
| Load regulation (AMS1117-1.8V) | ΔVout | 10 | 40 | mV | Vin=3.1V, 10mA≤Iout≤1A | 6 | |
| Quiescent current (AMS1117-1.8V) | Iq | 2 | 5 | mA | Vin=12V | 6 | |
| Input voltage | Vin | 15 | 18 | V | 5 | ||
| Thermal resistance junction-to-case, SOT-223 | θJC | 20 | ℃/W | SOT-223 package | 6 | ||
| Max input voltage | Vin(max) | 18 | V | 5 | |||
| Max operating junction temperature | Tj | 150 | ℃ | 5 | |||
| Storage temperature | Ts | -55 | 150 | ℃ | 5 | ||
| Lead temperature | 260 | ℃ | 10S | 5 | |||
| Environment (operating ambient) temperature | TA | -40 | 85 | ℃ | 2 | ||
| Bandgap reference temperature coefficient | 100 | ppm/℃ | Stated generally for the bandgap reference (all variants); printed as 'under 100 ppm/°C' | 7 | |||
| Thermal shutdown threshold | 170 | ℃ | Junction temperature above which thermal shutdown acts (text: 'larger than 170°C') | 7 |
CAD (KiCad official)
- Symbol:
AMS1117-1.8V - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
ams1117-1-8v-etched.step/ams1117-1-8v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ams1117-1-8v.step/ams1117-1-8v.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (14 pp, sha256
768f1a5d913d6211, retrieved 2026-11-13, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).