component
AMS1117A-ADJ
Public Made by Adomby adom
HX(hengjiaxing) 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
markdownAMS1117A-ADJ
HX(hengjiaxing) · Linear Voltage Regulators (LDO) · SOT-223
AMS1117A-ADJ from HX(hengjiaxing), 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 | input | Adjust pin (labelled Vss/ADJ) of the AMS1117A-ADJ that sets Vout=1.25×(1+R2/R1)+IAdj×R2 via an external divider, with typical IAdj of 55uA (max 120uA) and an optional CADJ bypass capacitor to ground for ripple rejection. |
| 2 | VOUT | power_out | Regulated output (1.25V to 12V adjustable) delivering up to 1A with dropout of 1.3V typ. at 100mA and 1.5V max at 1A, needing a 10uF capacitor for stability and at least 2mA (max 10mA) minimum load. |
| 3 | VIN | power_in | Input supply with recommended maximum of 15V and absolute maximum of 18V, bypassed with a 10uF capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HX(hengjiaxing) |
| Package | SOT-223 |
| Category | Power Supply Chip |
| 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 | 1.225 | 1.25 | 1.275 | V | AMS1117A-Adj, 10mA≤Iout≤1A, Vin=3.25V, TA=25℃ | 4 |
| Line regulation | ΔVout | 0.03 | 0.2 | %/V | AMS1117A-ADJ, Iout=10mA, 2.75V≤Vin≤12V | 4 | |
| Load regulation | ΔVout | 2 | 8 | mV | AMS1117A-ADJ, Vin =2.75V, 10mA≤Iout≤1A | 4 | |
| Dropout voltage | Vdrop | 1.15 | 1.3 | V | Iout =100mA | 5 | |
| Dropout voltage | Vdrop | 1.3 | 1.5 | V | Iout=1A | 5 | |
| Minimum load current | Imin | 2 | 10 | mA | AMS1117A-ADJ | 5 | |
| Adjust pin current | IAdj | 55 | 120 | uA | AMS1117A-ADJ, Vin=5V, 10mA≤Iout≤1A | 5 | |
| Iadj change | Ichange | 0.2 | 10 | uA | AMS1117A-ADJ, Vin=5V, 10mA≤Iout≤1A | 5 | |
| Temperature coefficient | ΔV/ΔT | -100 | 100 | ppm | 5 | ||
| Thermal resistance | θJC | 20 | ℃/W | SOT-223 | 5 | ||
| Package thermal resistance | 20 | ℃/W | SOT-223 | 3 | |||
| Max input voltage | 18 | V | 3 | ||||
| Max operating junction temperature | Tj | 150 | ℃ | 3 | |||
| Ambient temperature | Ta | -40 | 85 | ℃ | 3 | ||
| Storage temperature | Ts | -40 | 150 | ℃ | 3 | ||
| Lead temperature & time | 260 | ℃ | 10S | 3 | |||
| Recommended maximum input voltage | 15 | V | 3 | ||||
| Recommended operating junction temperature | Tj | -20 | 125 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
AMS1117A-ADJ - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
ams1117a-adj-etched.step/ams1117a-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ams1117a-adj.step/ams1117a-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HX(hengjiaxing) datasheet (9 pp, sha256
cd3d5a1ea037be22, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).