# HE2240A50HPR

**HEERMICR** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

HE2240A50HPR from HEERMICR, in a SOT-89-3. 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 | GND | power_in | Ground pin, which the datasheet says input and output capacitor grounds should return to with a wide, short copper trace. |
| 2 | VIN | power_in | Input supply pin with a 3.0V to 40V operating input range (absolute maximum 40V), decoupled by a recommended 10µF ceramic capacitor to GND. |
| 3 | VOUT | power_out | Regulated 5.0V output (±2%) delivering up to 250mA, requiring a recommended 10µF X7R/X5R ceramic output capacitor for stability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HEERMICR |
| Package | SOT-89-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 3 |  | 40 | V |  | 4 |
| Supply Current | IQ |  | 1.4 | 3 | uA | VIN=12V, ILOAD=0mA | 4 |
| Output Voltage (HE2240 5.0V variant), accuracy | VOUT2 | -2 |  | 2 | % | VIN=12V, IOUT=10mA; printed as Vset*0.98 / Vset*1.02 in the table, tolerance ±2% from Features | 1 |
| EN Threshold Voltage (shutdown) | VIL |  |  | 0.4 | V | Shutdown | 4 |
| EN Threshold Voltage (start-up) | VIH | 0.9 |  |  | V | Start-Up | 4 |
| Supply Voltage |  | -0.3 |  | 40 | V |  | 3 |
| Operating Temperature |  | -40 |  | 85 | ℃ |  | 3 |
| Storage Temperature |  | -50 |  | 125 | ℃ |  | 3 |
| Thermal Resistance (Junction to Ambient) | θJA |  |  | 200 | ℃/W | SOT89; no ambient airflow, no heat sink | 3 |
| Power Dissipation | PD |  |  | 0.5 | W | SOT89; Ta=25℃ | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | input and output capacitors must be back to the HE2240 ground pin using as wide and as short of a copper trace as is practical.Connections using long trace lengths, narrow trace widths, and/or | 6 |

## CAD (KiCad official)

- Symbol: `HE2240A50HPR`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `he2240a50hpr-etched.step` / `he2240a50hpr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `he2240a50hpr.step` / `he2240a50hpr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HEERMICR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590237642777255936) (9 pp, sha256 `30afcc83266a65aa`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/he2240a50hpr-datasheet.pdf)