What is 2N7002KDW-GP MOSFET?

 After many days I am writing this note. My last work was studying the schematic diagram of dell laptop because I am trying to repair it myself. But to repair the dell laptop, I needed to find where the problem lies. Now there are lots of laptop repair videos on youtube but knowing the laptop circuit diagram is important. I wrote mosfet transistors, buck converter TPS51225RUKR IC, battery charger IC BQ24727,  Keyboard Controller(KBC) or I/O controller IC that are used in the laptop. Here I wanted to write a note on 2N7002KDW-GP dual channel MOSFET which is used in dell inspiron laptop.

The 2N7002KDW-GP is a dual N-channel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) in a SOT-363/SC-88 surface-mount package.

Below is dell laptop schematic which shows where this 2N7002KDW-GP MOSFET is used.

As can be seen this mosfet is supplying the main power supply to the rest of the circuit. The PW_CHG_ACOK signal seems to control the mosfet.

Key Features:

• Type: Dual N-channel enhancement-mode MOSFET

• Package: SOT-363 (small 6-pin package, space-saving)

• Voltage & Current Ratings:

  • Drain-Source Voltage (V_DS): 60V

  • Gate-Source Voltage (V_GS): ±20V

  • Continuous Drain Current (I_D): 115mA per MOSFET

  • On-Resistance (R_DS(on)): ~5Ω (typical at V_GS = 10V)

• Low Power Consumption: Suitable for battery-operated devices.

• Applications:

  • Signal switching

  • Load switching in low-power circuits

  • Portable electronics (e.g., smartphones, IoT devices)

  • Logic level conversion

Why Use a Dual MOSFET?

• Saves space compared to two single MOSFETs.

• Useful for symmetrical circuits (e.g., bidirectional switches, level shifters).