The **GS-R24P0331.5** is a high-efficiency DC-DC step-down (buck) voltage regulator module, formerly manufactured by STMicroelectronics. It is part of the GS-R series, designed to provide a stable output from a higher DC input voltage. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 9V to 40V DC | | **Output Voltage** | 3.3V DC | | **Output Current** | 1.5A | | **Efficiency** | ~75% to 80% (typical) | | **Switching Frequency** | ~100 kHz | | **Package Type** | Vertical SIP (Single In-line Package) | --- ### 2. Functional Features * **Integrated Design:** Unlike discrete regulators that require external inductors and diodes, this module integrates the switching controller, power MOSFET, inductor, and compensation network into a single block. * **Protection Mechanisms:** * **Short-Circuit Protection:** Protects the module in case of load failure. * **Thermal Shutdown:** Automatically turns off if the internal temperature exceeds safe limits. * **Current Limiting:** Prevents damage from over-current conditions. * **Remote Inhibit:** Includes a pin for remote On/Off control, allowing the system to disable the power rail for energy saving. --- ### 3. Pin Configuration (Typical) The GS-R series modules generally follow a standard pinout for SIP packages: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | **+Vin** | Positive Input Voltage (9V - 40V) | | **2** | **Inhibit** | Remote control (High = On, Low/GND = Off) | | **3, 4** | **GND** | Common Ground | | **5, 6** | **+Vout** | Regulated 3.3V Output | | **7** | **S+** | Remote Sense (Connect to Vout at the load) | --- ### 4. Application Areas * **Industrial Automation:** Powering 3.3V logic circuits (MCUs, FPGAs) from a 24V industrial bus. * **Telecommunications:** Converting standard 12V or 24V rails to low-voltage digital rails. * **Legacy Hardware:** Often found in older industrial equipment where modular power solutions were preferred for ease of maintenance. --- **Note:** STMicroelectronics has discontinued many parts in the GS-R series. If you are designing a new product, it is recommended to look for modern integrated switching regulators (e.g., RECOM or TRACO Power modules) as direct replacements.