# AP1084KG-13

**Diodes Incorporated** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263

AP1084KG-13 from Diodes Incorporated, in a TO-263. 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) | input | Adjustable pin: a resistor divider from this pin to VOUT and ground sets the output voltage, and this pin is ground only in fixed-mode versions. |
| 2 | VOUT | power_out | Regulator output, which requires a minimum of 10uF capacitor with 0.15Ω ≤ ESR ≤ 20Ω connected from this pin to ground for stability; the tab is also VOUT. |
| 3 | VIN | power_in | Input pin, which must always be 1.4V (1.3V) higher than VOUT for the device to regulate properly, with a large storage capacitor typically connected to ground to prevent sag during load transients. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TO-263 |
| 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 |
|---|---|---|---|---|---|---|---|
| Absolute maximum DC supply voltage (VIN) | VIN | -0.3 |  | 12 | V |  | 4 |
| Storage temperature | TST | -65 |  | 150 | oC |  | 4 |
| Maximum junction temperature | TMJ |  |  | 150 | oC |  | 4 |
| Operating junction temperature range | TOP | 0 |  | 125 | oC |  | 4 |
| Reference voltage (adjustable) | VREF | 1.225 | 1.25 | 1.275 | V | Io = 10mA, TA = 25oC, (VIN-VOUT) = 1.5V | 5 |
| Line regulation (AP1084-XXX) |  |  |  | 0.2 | % | IO = 10mA, VOUT+1.5V<VIN<12V, TA = 25oC | 5 |
| Load regulation (AP1084-Adj) |  |  |  | 1 | % | VIN = 3.3V, 0mA<Io<5A, TA = 25oC | 5 |
| Dropout voltage | Vo |  | 1.3 | 1.4 | V | Io = 5.0A (VOUT = 1% VOUT) | 5 |
| Current limit |  |  |  | 5.1 | A | VIN-VOUT = 5V | 5 |
| Minimum load current |  |  | 5 | 10 | mA |  | 5 |
| Temperature stability |  |  |  | 0.5 | % | Io = 10mA | 5 |
| Thermal shutdown temperature | TSD |  |  | 150 | oC |  | 5 |
| Thermal resistance junction-to-ambient, TO263-3L | θJA |  |  | 60 | C/W | Note 5: FR-4 single-sided PCB, 2oz copper, minimum pad layout, no air flow | 5 |
| Thermal resistance junction-to-case, TO263-3L | θJC |  |  | 3.5 | C/W | Control Circuitry/Power Transistor | 5 |

## CAD (KiCad official)

- Symbol: `AP1084KG-13`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `ap1084kg-13-etched.step` / `ap1084kg-13-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap1084kg-13.step` / `ap1084kg-13.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907276002603009) (11 pp, sha256 `a63fa1ea8d47d001`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/ap1084kg-13-datasheet.pdf)