# MIC4425YM

**Microchip Tech** · Gate Drive ICs · SOIC-8

MIC4425YM from Microchip Tech, in a SOIC-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 | NC | unconnected | Not connected internally; the datasheet lists pin 1 as NC on the 8-pin SOIC. |
| 2 | INA | input | Control input for driver A, TTL-compatible with logic 1 at 2.4V minimum and logic 0 at 0.8V maximum, and it withstands swings to 5V below ground without latch-up. |
| 3 | GND | power_in | Ground return for both drivers; the datasheet absolute maximum input range is VS + 0.3V to GND - 5V, and the device tolerates up to 5V of ground-pin noise spiking. |
| 4 | INB | input | Control input for driver B, TTL-compatible with logic 1 at 2.4V minimum and logic 0 at 0.8V maximum, and it withstands swings to 5V below ground without latch-up. |
| 5 | OUTB | output | Output of driver B, rated for 3A peak output current, with the output swinging within 25mV of ground or VS. |
| 6 | VS | power_in | Supply input for the drivers, specified for 4.5V to 18V operation with an absolute maximum of 22V. |
| 7 | OUTA | output | Output of driver A, rated for 3A peak output current, with the output swinging within 25mV of ground or VS. |
| 8 | NC | unconnected | Not connected internally; the datasheet lists pin 8 as NC on the 8-pin SOIC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-8 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Logic 1 Input Voltage | VIH | 2.4 |  |  | V | 4.5V ≤ VS ≤ 18V | 3 |
| Logic 0 Input Voltage | VIL |  |  | 0.8 | V | 4.5V ≤ VS ≤ 18V | 3 |
| Input Current | IIN | -1 |  | 1 | µA | 0V ≤ VIN ≤ VS | 3 |
| Input Current (bold, -40°C to +85°C) | IIN | -10 |  | 10 | µA |  | 3 |
| High Output Voltage | VOH | -0.025 |  |  | V |  | 3 |
| Low Output Voltage | VOL |  |  | 0.025 | V |  | 3 |
| Output Resistance HI State | RO |  | 2.8 | 5 | Ω | IOUT = 10mA, VS = 18V | 3 |
| Output Resistance HI State | RO |  | 3.7 | 8 | Ω | VIN = 0.8V, IOUT = 10mA, VS = 18V | 3 |
| Output Resistance LO State | RO |  | 3.5 | 5 | Ω | IOUT = 10mA, VS = 18V | 3 |
| Output Resistance LO State | RO |  | 4.3 | 8 | Ω | VIN = 2.4V, IOUT = 10mA, VS = 18V | 3 |
| Latch-Up Protection Withstand Reverse Current |  | 500 |  |  | mA | Withstand Reverse Current; printed as >500 mA | 3 |
| Rise Time | tR |  | 23 | 35 | ns | test Figure 1, CL = 1800pF | 3 |
| Rise Time | tR |  | 28 | 60 | ns |  | 3 |
| Fall Time | tF |  | 25 | 35 | ns | test Figure 1, CL = 1800pF | 3 |
| Fall Time | tF |  | 32 | 60 | ns |  | 3 |
| Delay Time | tD1 |  | 33 | 75 | ns | test Figure 1, CL = 1800pF | 3 |
| Delay Time | tD1 |  | 32 | 100 | ns |  | 3 |
| Delay Time | tD2 |  | 38 | 75 | ns | test Figure 1, CL = 1800pF | 3 |
| Delay Time | tD2 |  | 38 | 100 | ns |  | 3 |
| Pulse Width | tPW | 400 |  |  | ns | test Figure 1 | 3 |
| Power Supply Current | IS |  | 1.5 | 2.5 | mA | VIN = 3.0V (both inputs) | 3 |
| Power Supply Current (bold, -40°C to +85°C) | IS |  | 2 | 3.5 | mA |  | 3 |
| Power Supply Current | IS |  | 0.15 | 0.25 | mA | VIN = 0.0V (both inputs) | 3 |
| Power Supply Current (bold, -40°C to +85°C) | IS |  | 0.2 | 0.3 | mA |  | 3 |
| Supply Voltage | VS |  |  | 22 | V | Absolute Maximum Ratings | 3 |
| Input Voltage (max VS + 0.3V; min GND, 5V as printed) | VIN | -5 |  | 0.3 | V |  | 3 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 3 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 3 |
| ESD Susceptibility |  |  |  | 1000 | V | Note 3 | 3 |
| Supply Voltage (VS) | VS | 4.5 |  | 18 | V | Operating Ratings | 3 |
| Temperature Range B Version | TA | -40 |  | 85 | °C | B Version (MIC4425YM is the B-grade, Pb-free 8-pin SOIC) | 3 |
| Package Thermal Resistance SOIC junction-to-ambient | θJA |  | 120 |  | °C/W | SOIC | 3 |
| Package Thermal Resistance SOIC junction-to-case | θJC |  | 75 |  | °C/W | SOIC | 3 |
| Peak Output Current | IPK |  | 3 |  | A |  | 3 |

## CAD (KiCad official)

- Symbol: `MIC4425YM`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `mic4425ym-etched.step` / `mic4425ym-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mic4425ym.step` / `mic4425ym.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/mic4425ym-datasheet.pdf) (13 pp, sha256 `7c71a3a03a494f5a`, retrieved 2026-10-28, 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/mic4425ym-datasheet.pdf)