Product introduction：
1. Product Introduction (WST3423-VB)
WST3423-VB is a unipolar P-channel MOSFET in SOT23-3 package, suitable for switching applications with low voltage and medium current load. The product has a maximum drain-source voltage (VDS) of -20V, a gate-source voltage (VGS) of ±12V, and a threshold voltage (Vth) of -0.8V, and can be turned on at a lower gate voltage. Its on-resistance (RDS(ON)) is 65mΩ at VGS = 4.5V and 60mΩ at VGS = 10V, providing efficient current conduction capability. The maximum drain current (ID) of this MOSFET is -4A, which is suitable for applications in battery-powered systems, load switches, and power management, especially in battery-driven portable devices and low-power applications.
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Product parameter：
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds2.5 |
Rds4.5 |
Rds10 |
Technology |
| SOT23-3 |
Single-P |
-20V |
12（±V） |
-0.8V |
-4A |
80mΩ |
|
60mΩ |
|
2. Detailed parameter description
| **Parameter** | **Description** |
|-------------------------|--------------------------------------------------------------------------|
| **Model** | WST3423-VB |
| **Package** | SOT23-3 |
| **Configuration** | Unipolar P channel|
| **Maximum drain-source voltage (VDS)** | -20V |
| **Gate-source voltage (VGS)** | ±12V |
| **Threshold voltage (Vth)** | -0.8V |
| **On-resistance (RDS(ON))** | 80mΩ (VGS=2.5V), 65mΩ (VGS=4.5V), 60mΩ (VGS=10V) |
| **Maximum drain current (ID)** | -4A |
| **Technology type** | Trench technology|
- **VDS**: The maximum drain-source voltage is -20V, which is suitable for negative power switch applications and can effectively control the load in negative voltage systems.
- **VGS**: The gate-source voltage is ±12V, which is suitable for a variety of common gate drive voltages and provides flexible application scenarios.
- **Vth**: The threshold voltage is -0.8V, which has a lower turn-on voltage and can be turned on at a lower gate voltage to improve switching efficiency.
- **RDS(ON)**: At VGS = 10V, the on-resistance is 60mΩ and at VGS = 4.5V it is 65mΩ, which is suitable for applications requiring low conduction losses.
- **ID**: The maximum drain current is -4A, which can handle medium current loads.
Domain and module applications：
3. Application fields and modules
WST3423-VB is suitable for the following fields and modules:
- **Portable devices and battery-powered systems**: The low threshold voltage (Vth = -0.8V) and low on-resistance of WST3423-VB make it very suitable for portable devices and battery-powered systems, such as mobile phones, smart watches, portable speakers, wireless sensors, etc. It can efficiently control the power switch, extend battery life and optimize energy efficiency.
- **Battery Management System (BMS)**: This MOSFET can be used as a current switch in the battery management system, especially in battery charging and discharging control. Its low RDS(ON) characteristics help reduce energy loss during battery charging and discharging, and improve battery efficiency and life.
- **Low-power switching power supply**: WST3423-VB can be widely used in low-power switching power supplies (such as DC-DC converters) to provide negative voltage switching control. Its lower on-resistance can improve conversion efficiency and reduce system energy consumption.
- **Load Switch and Power Switch**: Suitable for load control and power switch modules, especially when negative power needs to be controlled by a P-channel MOSFET. The on-resistance of the WST3423-VB makes it excel in this scenario, reducing heat loss and increasing switching speed.
- **Smart Home and Internet of Things (IoT) Devices**: In smart home and IoT devices, the WST3423-VB can be used in power switches, load control, and energy management systems. Low power consumption and high efficiency make it an ideal choice for these devices.
- **Automotive Electronics**: The WST3423-VB can also be effectively used in automotive power management, load switching, and protection circuits. For example, in the battery management and load control system of electric vehicles, it can efficiently control the current flow during battery discharge and charging.
In summary, as an efficient P-channel MOSFET, the WST3423-VB is suitable for applications such as low-power negative power control, switching power supplies, load switches, and battery management systems. Its low on-resistance and lower gate voltage threshold make it ideal for applications such as portable devices, battery management, IoT and automotive electronics.
* Please note: the above is only an example application scenario, the specific application depends on the requirements and conditions of the system design. When using this device, consult its data sheet for detailed technical specifications and features
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