component
AMS1117-2.5V
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
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownAMS1117-2.5V
MSKSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
AMS1117-2.5V 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 / VSS reference pin. On the fixed 2.5 V version this pin is the device ground return (the datasheet labels the pin 'VSS/ADJ' because the same silicon is used for the adjustable variant, where it becomes the ADJ feedback input). |
| 2 | VOUT | power_out | Regulated 2.5 V output (typ. 2.5 V, min 2.45 V, max 2.55 V at Vin=3.8 V, 0 ≤ Iout ≤ 1 A). Requires a ~10 uF tantalum output capacitor for stability. |
| 3 | VIN | power_in | Unregulated input voltage. For the 2.5 V variant, Vin must be ≥ 3.8 V for full regulation (dropout ~1.3 V @ 1 A). Absolute maximum input voltage is 18 V; recommended maximum operating input is 15 V. Requires a ~10 uF tantalum bypass capacitor. |
| 4 | VOUT | power_out | Regulated 2.5 V output; electrically connected to pin 2. This is the large tab pad on the SOT-223 package and also serves as the primary thermal path to the PCB copper 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 |
|---|---|---|---|---|---|---|---|
| Input voltage | Vin | 15 | 18 | V | 5 | ||
| Output voltage (AMS1117-2.5V) | VOUT | 2.45 | 2.5 | 2.55 | V | 0≤Iout≤1A , Vin=3.8V | 5 |
| Line regulation (AMS1117-2.5V) | △Vout | 8 | 41 | mV | Iout=10mA, 3.8V≤Vin≤12V | 5 | |
| Load regulation (AMS1117-2.5V) | △Vout | 10 | 40 | mV | Vin =2.8V, 10mA≤Iout≤1A | 6 | |
| Dropout voltage | Vdrop | 1.1 | 1.3 | V | Iout =100mA | 6 | |
| Dropout voltage | Vdrop | 1.3 | 1.5 | V | Iout=1A | 6 | |
| Quiescent current (AMS1117-2.5V) | Iq | 2 | 5 | mA | Vin=12V | 6 | |
| Thermal resistance junction-to-case | θJC | 3 | 20 | ℃/W | SOT-22 (as printed) | 6 | |
| Max input voltage | 18 | V | 5 | ||||
| Max operating junction temperature | Tj | 150 | ℃ | 5 | |||
| Storage temperature | Ts | -55 | 150 | ℃ | 5 | ||
| Lead temperature | 260 | ℃ | 10 S | 5 | |||
| Environment temperature | -40 | 85 | ℃ | 2 |
CAD (KiCad official)
- Symbol:
AMS1117-2.5V - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
ams1117-2-5v-etched.step/ams1117-2-5v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ams1117-2-5v.step/ams1117-2-5v.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).