3. **Application fields and module examples**

- **Low power switch power supply (SMPS)**: STK7002R-VB is suitable for low power switch power supply (SMPS), especially for power modules that need to handle low current loads. In such applications, MOSFET can provide efficient switching performance and is suitable for small power adapters, mobile phone chargers, battery management systems and other devices. Due to its low on-resistance, STK7002R-VB can reduce power loss, improve power conversion efficiency and extend battery life.

- **LED driver power supply**: Due to its low current handling capability, STK7002R-VB is suitable for low power LED driver power supply applications, especially for small LED lighting systems. The low on-resistance of MOSFET helps optimize system efficiency, ensure stable operation of LED drivers, and reduce energy loss, extending the service life of lamps.

- **Portable electronic devices**: STK7002R-VB is widely used in low power portable electronic devices. Due to its small package (SOT23-3) and low current capability, it is ideal for use in small battery-driven devices such as handheld sensors, Bluetooth headsets, wireless mice, and other switching power modules in portable electronic devices. MOSFETs can handle small current loads with lower power consumption, improving the battery efficiency and usage time of the device.

- **Battery Management System (BMS)**: In the battery management system (BMS), the STK7002R-VB can be used for power control and battery voltage monitoring circuits for small power loads. Its 60V withstand voltage and low drain current are suitable for low-voltage, low-current battery management applications. This MOSFET can effectively control the battery charging and discharging process to ensure the battery's health and service life.

- **Switching Sensor Power Supply**: The STK7002R-VB is also suitable for low-power sensor power supply. Especially in low-power sensor applications, MOSFETs can be used for switching control to help achieve stable sensor power supply with low power consumption. For example, it can be used as a switching element for small sensor modules such as gas sensors, temperature and humidity sensors, and light sensors.

- **Wireless transmission module and microcontroller power supply**: STK7002R-VB is also suitable for power management of devices such as wireless communication modules and microcontrollers (MCUs). It can be used in switching power supply circuits in low-power wireless data transmission systems to ensure high-efficiency operation of microcontrollers and transmission modules and reduce power loss.

- **Low-power automotive electronic systems**: In low-power automotive electronic systems, STK7002R-VB can be used to control the switching of battery power, on-board sensors and small loads. Its low current capability and high-efficiency switching characteristics make it suitable for low-power power management in on-board electronic devices.

In summary, STK7002R-VB is a low-power, high-efficiency N-type MOSFET, which is widely used in low-power switching power supplies, LED drivers, battery management, portable electronic devices, sensor power supplies, and automotive electronics. Its low on-resistance, small package, and lower current handling capability make it an ideal choice for small battery-driven applications and high-efficiency power systems.