The **SVB-5W0-R/E** is a high-performance **Step-Down (Buck) DC-DC Converter Module** manufactured by **Sanken Electric**. These modules are designed to provide a stable regulated voltage from a higher unregulated input voltage with high efficiency. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 8V to 40V DC | | **Output Voltage** | 5V DC (Fixed) | | **Maximum Output Current** | 1.0A | | **Efficiency** | Approximately 80% - 85% | | **Switching Frequency** | ~125 kHz | | **Operating Temperature** | -20°C to +80°C | | **Package Type** | SIL (Single In-line Package) - 5 Pins | --- ### 2. Functional Features * **Integrated Design:** Unlike discrete regulators (like the 7805), this module integrates the switching controller, power MOSFET, and compensation circuits into a single package. * **High Efficiency:** Because it uses switching technology rather than linear regulation, it generates significantly less heat, often eliminating the need for large heatsinks. * **Built-in Protection:** * **Overcurrent Protection (OCP):** Protects the device from damage during short circuits. * **Thermal Shutdown:** Automatically turns off if the internal temperature exceeds safe limits. * **Variable Output Option:** While this specific model is tuned for 5V, the series often allows for slight output adjustment via external resistors on specific pins. --- ### 3. Pin Configuration (Typical) | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | **Vin** | Unregulated DC Input (8V - 40V) | | 2 | **SW Out** | Connection for external inductor/diode | | 3 | **GND** | Common Ground | | 4 | **Vout / FB** | Output Voltage Feedback | | 5 | **SS / ON-OFF** | Soft Start or Remote Control (model dependent) | --- ### 4. Typical Application Circuit To use the SVB-5W0-R/E, you generally need minimal external components: 1. **Input Capacitor:** To stabilize input voltage. 2. **Output Inductor:** For energy storage during switching. 3. **Catch Diode (Schottky):** To provide a path for current when the internal switch is off. 4. **Output Capacitor:** To filter the ripple and provide a smooth 5V DC output. ```text [Input 8-40V] ---- [Vin] [SVB-5W0-R/E] [SW] ---- (Inductor) ---- [Output 5V] [GND] | | (Catch Diode) [GND] | [GND] ``` ---