# TMI2284Q

**TMI** · DC-DC Converters · SOP-8

TMI2284Q from TMI, in a SOP-8. 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 | FB | input | Feedback pin that senses the output voltage through the RFB1/RFB2 divider (1.22V typical feedback reference) and sets line drop compensation via RFB1. |
| 2 | FSW | passive | Switching frequency set pin; connect a resistor to ground (120kHz if floating), and do not connect this pin directly to GND. |
| 3 | ISET | passive | Output current limit set pin; connect a resistor to ground, with a default limit of 3.5A at 5V output when floating. |
| 4 | IN | power_in | Power input pin with 4.5V to 40V operating range (absolute maximum 42V). |
| 5 | SW | power_out | Switch pin connected to the external inductor (absolute maximum -0.3 to 42V). |
| 6 | SW | power_out | Switch pin connected to the external inductor (absolute maximum -0.3 to 42V). |
| 7 | GND | power_in | Ground pin. |
| 8 | GND | power_in | Ground pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TMI |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## 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 Range |  | 4.5 |  | 40 | V |  | 4 |
| Feedback Voltage Accuracy |  | 1.19 | 1.22 | 1.25 | V |  | 4 |
| FB Pin input current |  | -50 |  | 50 | nA |  | 4 |
| Quiescent Current |  |  | 1 | 4 | mA | VOUT=5V,No load | 4 |
| Input Over Voltage Protection Threshold |  |  | 40.2 |  | V |  | 4 |
| Under Voltage Lockout Threshold |  |  | 4 |  | V | VIN rising | 4 |
| UVLO Hysteresis |  |  | 0.16 |  | V |  | 4 |
| Soft Start Time |  |  | 4 |  | ms |  | 4 |
| Switching Current limit |  |  | 5 |  | A | Duty=50% | 4 |
| SW leakage |  |  | 10 |  | μA |  | 4 |
| Maximum Duty Cycle |  |  | 100 |  | % | Fs=130kHz | 4 |
| Switching Frequency (RFSW=22kΩ) |  |  | 270 |  | kHz | RFSW=22kΩ | 4 |
| Switching Frequency (FSW pin floating) |  |  | 120 |  | kHz | FSW pin floating | 4 |
| Switch On-Resistance (high side) |  |  | 45 |  | mΩ |  | 4 |
| Switch On-Resistance (low side) |  |  | 25 |  | mΩ |  | 4 |
| Short circuit Frequency |  |  | 40 |  | kHz | VFB=0V, FSW pin floating | 4 |
| Minimum On Time |  |  | 150 |  | ns |  | 4 |
| Thermal Shutdown Threshold |  |  | 160 |  | °C | Guaranteed by design | 4 |
| Thermal Shutdown Hysteresis |  |  | 20 |  | °C | Guaranteed by design | 4 |
| VIN IN Voltage Range (recommended operating) | VIN | 4.5 |  | 40 | V |  | 3 |
| TJ Operating Junction Temperature Range | TJ | -40 |  | 125 | °C |  | 3 |
| Input Supply Voltage IN and SW (absolute maximum) |  | -0.3 |  | 42 | V |  | 2 |
| All Other Pins Voltage Range (absolute maximum) |  | -0.3 |  | 6 | V |  | 2 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 2 |
| Junction Temperature Range (absolute maximum) |  | -40 |  | 150 | °C |  | 2 |
| Power Dissipation |  |  |  | 2 | W |  | 2 |
| Lead Temperature (Soldering) |  |  |  | 260 | °C | Soldering, 10s | 2 |
| ESD Human Body Model for all pins | VESD | -2000 |  | 2000 | V | JEDEC specification JS-001 | 3 |
| Junction-to-ambient Thermal Resistance |  |  | 60 |  | °C/W |  | 2 |
| Junction-to-case Thermal Resistance |  |  | 46 |  | °C/W |  | 2 |

## CAD (KiCad official)

- Symbol: `TMI2284Q`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `tmi2284q-etched.step` / `tmi2284q-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tmi2284q.step` / `tmi2284q.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590457776486326272) (11 pp, sha256 `98401d3243020e3b`, retrieved 2026-10-20, 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/tmi2284q-datasheet.pdf)