# AP2112K-1.2TRG1

**Diodes Incorporated AP2112K 1 2TRG1** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-25

AP2112K-1.2TRG1 from Diodes Incorporated AP2112K 1 2TRG1, in a SOT-25. 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 | VIN | power_in | Input supply voltage. Recommended operating range 2.5V to 6.0V (absolute max 6.5V). Bypass with a 1.0µF ceramic capacitor (X5R/X7R) to GND close to the pin. |
| 2 | GND | power_in | Device ground reference for the internal reference, error amplifier, and pass FET return current. |
| 3 | EN | input | Chip enable input. Drive high (VIH ≥ 1.5V, up to 6.0V) for normal operation; drive low (VIL ≤ 0.4V) to shut down the regulator. Internal ~3MΩ pull-down to GND; when EN is low, VOUT is discharged through an internal ~60Ω resistor. |
| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND per board practice. |
| 5 | VOUT | power_out | Regulated 1.2V output (±1.5% accuracy) capable of 600mA (min). Requires a 1.0µF ceramic/tantalum/aluminum electrolytic capacitor to GND for stability. Foldback short-circuit protection limits current to ~50mA into a shorted output. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated AP2112K 1 2TRG1 |
| Package | SOT-25 |
| Category | PMIC |
| Pins | 5 |

## Ordering variants

- `AP2112K-1.2TRG1`
- `AP2112K-1.2TRG1K-1.8TRG1`
- `AP2112K-1.2TRG1K-2.5TRG1`
- `AP2112K-1.2TRG1K-2.6TRG1`
- `AP2112K-1.2TRG1K-3.3TRG1`
- `AP2112K-1.2TRG1R5-1.2TRG1`
- `AP2112K-1.2TRG1R5-1.8TRG1`
- `AP2112K-1.2TRG1R5-2.5TRG1`
- `AP2112K-1.2TRG1R5-2.6TRG1`
- `AP2112K-1.2TRG1R5-3.3TRG1`
- `AP2112K-1.2TRG1R5A-1.2TRG1`
- `AP2112K-1.2TRG1R5A-1.8TRG1`
- `AP2112K-1.2TRG1R5A-2.5TRG1`
- `AP2112K-1.2TRG1R5A-2.6TRG1`
- `AP2112K-1.2TRG1R5A-3.3TRG1`
- `AP2112K-1.2TRG1M-1.2TRG1`
- `AP2112K-1.2TRG1M-1.8TRG1`
- `AP2112K-1.2TRG1M-2.5TRG1`
- `AP2112K-1.2TRG1M-2.6TRG1`
- `AP2112K-1.2TRG1M-3.3TRG1`

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply Voltage | VCC |  |  | 6.5 | V |  | 3 |
| Operating Junction Temperature Range | TJ |  |  | 150 | °C |  | 3 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 3 |
| Lead Temperature (Soldering) | TLEAD |  |  | 260 | °C | Soldering, 10 seconds | 3 |
| ESD (Machine Model) |  |  |  | 400 | V |  | 3 |
| ESD (Human Body Model) |  |  |  | 4000 | V |  | 3 |
| Supply Voltage | VIN | 2.5 |  | 6 | V |  | 3 |
| Ambient Operation Temperature Range | TA | -40 |  | 85 | °C |  | 3 |
| Maximum Output Current | IOUT(MAX) | 600 |  |  | mA | VIN = 2.5V, VOUT = 1.182V to 1.218V | 4 |
| Load Regulation | (∆VOUT/VOUT)/∆IOUT | -1 | 0.2 | 1 | %/A | VIN = 2.5V, 1mA ≤ IOUT ≤ 600mA | 4 |
| Line Regulation | (∆VOUT/VOUT)/∆VIN | -0.1 | 0.02 | 0.1 | %/V | 2.5V ≤ VIN ≤ 6V, IOUT = 30mA | 4 |
| Dropout Voltage | VDROP |  | 1000 | 1300 | mV | IOUT = 10mA | 4 |
| Quiescent Current | IQ |  | 55 | 80 | µA | VIN = 2.5V, IOUT = 0mA | 4 |
| Standby Current | ISTD |  | 0.01 | 1 | µA | VIN = 2.5V, VEN in OFF mode | 4 |
| Output Voltage Temperature Coefficient (printed ±100 in Typ column) | (∆VOUT/VOUT)/∆T | -100 |  | 100 | ppm/°C | IOUT = 30mA, TA = -40°C to +85°C | 4 |
| VEN High Voltage | VIH | 1.5 |  | 6 | V | Enable logic high, regulator on | 4 |
| VEN Low Voltage | VIL | 0 |  | 0.4 | V | Enable logic low, regulator off | 4 |
| EN Pull Down Resistor | RPD |  |  | 3 | MΩ |  | 4 |
| Thermal Shutdown Temperature | TOTSD |  |  | 160 | °C |  | 4 |
| Thermal Shutdown Hysteresis | THYOTSD |  |  | 25 | °C |  | 4 |
| Thermal Resistance (Junction to Ambient), SOT25 | θJA |  |  | 184 | °C/W | No heatsink | 3 |
| Output Voltage | VOUT |  | 1.2 |  | V | VIN = 2.5V, 1mA ≤ IOUT ≤ 30mA | 4 |
| Thermal Resistance (Junction to Case), SOT25 | θJC |  | 96 |  | °C/W | Junction to case, SOT25 | 4 |

## CAD (KiCad official)

- Symbol: `AP2112K-1.2TRG1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-25 (KiCad packages3D, STEP)
- 3D model files: `ap2112k-1-2trg1-etched.step` / `ap2112k-1-2trg1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap2112k-1-2trg1.step` / `ap2112k-1-2trg1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated AP2112K 1 2TRG1 datasheet](https://www.diodes.com/assets/Datasheets/AP2112K-1.2TRG1.pdf) (None pp, sha256 `ef8d376f2ec356e2`, retrieved 2026-08-17, 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).

[Datasheet PDF](docs/ap2112k-1-2trg1-datasheet.pdf)