# AMS1117CD-5.0

**UMW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

AMS1117CD-5.0 from UMW, in a TO-252-2. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground / return for the regulator. On the fixed-voltage AMS1117-5.0 this pin is the device ground reference (labeled GND/ADJ in the shared pinout table; on fixed versions the internal F1/F2 fuses connect it as GND). |
| 2 | VOUT | power_out | Regulated 5.0V output (1.176-1.224V per-cell trim; fixed 5.0V ±2% for the -5.0 variant). Requires a ≥22µF tantalum output capacitor for stability. Rated 1A continuous; current-limited at ~2.1-2.5A. On TO-252 this pin is electrically tied to the exposed tab. |
| 3 | VIN | power_in | Unregulated input supply. Absolute maximum 18V; recommended operating input 12V max. For a 5.0V output, VIN must be ≥ VOUT + VDROP (typ. 1.2V @ 1A). A 10µF input capacitor is recommended. |
| 4 | TAB | power_out | Exposed thermal tab on TO-252 (DPAK). Electrically connected to VOUT (pin 2) - solder to a copper pour tied to VOUT for heatsinking. Junction-to-ambient thermal resistance is 100°C/W for the TO-252 package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | TO-252-2 |
| Category | PMIC |
| Pins | 4 |

## Ordering variants

- `AMS1117CD-5.0`
- `AMS1117CD-5.0S-5.0`

## 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 (AMS1117-5.0 fixed) | VOUT | 4.9 | 5 | 5.1 | V | IOUT=10mA, VIN=7V, TJ=25°C | 4 |
| Output accuracy (fixed versions) |  | -2 |  | 2 | % | Fixed versions (1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V) | 1 |
| Ripple rejection | PSRR | 60 | 75 |  | dB | fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP | 4 |
| Adjust pin current change | Iadj |  | 0.2 | 5 | µA | 0≤ IOUT≤1A, 1.4V ≤VIN-VOUT≤10V | 5 |
| Adjust pin current | Iadj |  | 60 | 120 | µA |  | 5 |
| Quiescent current | Iq |  | 5 | 10 | mA |  | 4 |
| Dropout voltage | Vdrop |  | 1.2 | 1.3 | V | IOUT=1A | 4 |
| Current limiting | Ilimit | 2.1 |  | 2.5 | A |  | 5 |
| ESD tolerance (minimum) | ESD | 2000 |  |  | V | Minimum ESD tolerance | 3 |
| Input supply voltage (absolute maximum) | VIN |  |  | 18 | V |  | 3 |
| Lead temperature (soldering) | TLead |  |  | 260 | °C | Soldering, 5 seconds | 3 |
| Junction temperature range (absolute maximum) | TJ |  |  | 150 | °C |  | 3 |
| Storage temperature range | TSTG | -65 |  | 150 | °C |  | 3 |
| Input voltage (recommended) | VIN |  |  | 12 | V |  | 3 |
| Junction temperature range (recommended) | TJ | -40 |  | 125 | °C |  | 3 |
| Thermal resistance junction to ambient, TO-252 | Rja |  | 100 |  | °C/W | Junction to ambient, TO-252 package | 3 |
| Thermal shutdown | TSD |  | 150 |  | °C |  | 5 |
| Output voltage temperature stability | TSOUT |  | 0.5 |  | % |  | 5 |
| Long term stability |  |  | 0.3 |  | % | TA=125°C, 1000Hrs | 5 |
| RMS output noise |  |  | 0.003 |  | % | % of VOUT, 10Hz≤f≤10kHz | 5 |

## CAD (KiCad official)

- Symbol: `AMS1117CD-5.0`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files: `ams1117cd-5-0-etched.step` / `ams1117cd-5-0-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ams1117cd-5-0.step` / `ams1117cd-5-0.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`ams1117cd-5-0.step`](ams1117cd-5-0.step) | 119 KB | You want the bare part, or you mark your own boards. |
| [`ams1117cd-5-0-etched.step`](ams1117cd-5-0-etched.step) | 1.7 MB | You want the part with `AMS1117CD-5.0` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 465 faces against 83 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [UMW datasheet](docs/ams1117cd-5-0-datasheet.pdf) (13 pp, sha256 `5ec219092aa45bd9`, retrieved 2026-08-17, tier: lcsc)
- **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).

[Datasheet PDF](docs/ams1117cd-5-0-datasheet.pdf)