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Both the above figures are with 10V drive to the gate.
The device is the SQJA81EP, which comes in a 5.13 x 6.15mm surface-mount PowerPAK SO-8L (PowerPAK) package with gullwing leads – gullwings allow for increased automatic optical inspection capabilities and provide mechanical stress-relief for increased board-level reliability.
“With the lowest on-resistance of any -80V p-channel device, the Vishay Siliconix SQJA81EP increases power density and efficiency in automotive applications,” according to New Yorker Electronics, which is stocking the part. “on-resistance is 28% lower than the closest competing device in DPAK, while offering a 50% smaller footprint.”
Use is foreseen in reverse polarity protection, battery management, high-side load switching and LED lighting. Unlike with an n-channel mosfet used on the high-side, no charge pump is needed with a p-channel transistor.
An 80V rating provides some safety margin on 12, 24 and 48V rails.
| Part number | SQJA81EP |
| Package | PowerPAK SO-8L |
| Vds | -80V |
| Vgs | ±20V |
| Rds(on) (Vgs 10V) | 14.3mΩ typ, 17.3mΩ max |
| Rds(on) (Vgs 4.5V) | 21.9mΩ typ, 26.5mΩ max |
| Qgate (Vgs 10V) | 52nC typ, 80nC max |
