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FDMC8878
Power56 (5x6mm)
The FDMC8878 from onsemi is a 30V, 30A N-channel MOSFET with 5.8mOhm on-resistance in a Power56 package for synchronous buck converter and motor drive applications.
| Package | Power56 (5x6mm) |
The FDMC8878 from onsemi is a 30V, 30A N-channel MOSFET with 5.8mOhm on-resistance in a Power56 package for synchronous buck converter and motor drive applications.
The FDMC8878 is an N-channel power MOSFET from onsemi in Power56 (5x6mm) package, rated at 30V VDSS, 30A ID, and 5.8mOhm RDS(on) at VGS=4.5V. The Power56 package is a low-profile SMD with an exposed drain pad, providing excellent thermal performance (20C/W junction-to-PCB) and low parasitic inductance (0.5nH source inductance), critical for high-frequency switching. The logic-level gate (VGS threshold 1-2.2V) allows direct drive from 3.3V or 5V microcontrollers without a gate driver for low-frequency applications. The low gate charge (10nC at VGS=4.5V) enables fast switching: at 1A gate drive current, the rise time is approximately 10ns. The device is optimized for synchronous rectification in DC-DC buck converters: when used as the low-side switch, the 5.8mOhm RDS(on) replaces a Schottky diode, reducing conduction losses by 50-70% in high-current applications. At 20A load, the conduction loss is only 20^2 x 0.0058 = 2.3W. The device includes an integrated Schottky body diode (not standard body diode) for reduced Qrr in synchronous rectification. The -8878 suffix specifies the device variant. Applications include: synchronous buck converter low-side, battery disconnect switches, and motor drive half-bridges.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | S | Power | Source (connects to ground or negative rail for low-side N-ch switching) |
| 2 | G | Input | Gate (VGS threshold 1-2.2V, max +/-12V, Qg=10nC at VGS=4.5V) |
| 3 | D | Power | Drain (30V VDSS, 30A ID, connects to load, 5.8mOhm RDS(on) at VGS=4.5V) |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| onsemi | FDMC8878 | Power56 | Same device, onsemi brand |
| onsemi | FDMC86348 | Power56 | 30V 27A 3.5mOhm, lower RDS(on), onsemi |
| Infineon | BSC014N03LS | Power56 | 30V 33A 1.4mOhm, Infineon OptiMOS |
| Vishay | SI7860DP-T1-E3 | PowerPAK SO-8 | 60V 12A 16mOhm, Vishay brand |
| Texas Instruments | CSD17312Q5 | SON-5×6 | 30V 26A 3.7mOhm, TI brand |
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
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