### Detailed product parameter description:

**Product model: ** STS2309-VB
**Silk screen: ** VB2290
**Brand: ** VBsemi
**Parameters: **
- Package type: SOT23
- Channel type: P—Channel channel
- Rated voltage: -20V
- Rated current: -4A
- On-resistance: RDS(ON)=57mΩ @ VGS=4.5V, VGS=12V
- Threshold voltage: Vth=-0.81V

**Package: ** SOT23

### Application introduction:

STS2309-VB is a P-Channel field effect transistor in a SOT23 package with excellent electrical performance and is suitable for a variety of application scenarios. Here are some typical application areas and module examples:

1. **Power management module:** Due to the product's -20V rated voltage and -4A rated current, it is suitable for power management modules and can be used in scenarios such as switching power supplies and battery charge and discharge management, providing efficient power control.

2. **Drive module:** With low on-resistance, it is suitable for drive modules, such as for driving motors, LEDs, etc., and can achieve low loss under high current loads.

3. **Current control module:** Due to the low threshold voltage, it is suitable for current control modules, such as for LED drive current control, and can achieve precise current regulation.

4. **Signal amplification module:** The compact SOT23 package is suitable for signal amplification modules, which can be used to amplify sensor output signals, etc.

### Example application areas:

1. **Industrial control:** Used to drive motors or actuators in industrial equipment.

2. **Power management:** Applicable to switching power supplies and battery management systems, providing reliable power control.

3. **Lighting control:** Used in LED drive circuits to achieve lighting control and provide efficient lighting solutions.

4. **Automotive electronics:** Used for power management and drive control in automotive electronic systems, providing high-performance automotive electronic solutions.

STS2309-VB products have a wide range of applications in the above fields, providing high-performance options for various circuit designs. When choosing, please adjust according to specific system requirements and circuit design.