The **PS5023-2R2** is a surface-mount (SMD) power inductor commonly used in DC-DC converter circuits. It is designed to store energy in a magnetic field to smooth out current fluctuations. ### Technical Specifications Below are the typical electronic characteristics for this specific part number: | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~18-25 mΩ (Typical) | | **Saturation Current (Isat)** | ~4.5A - 5.5A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 5.0mm x 5.0mm x 2.3mm | --- ### Key Electronic Components & Construction #### 1. The Core Material The "PS" series typically utilizes a **Ferrite core**. Ferrite is preferred for high-frequency applications because it has low eddy current losses, allowing the inductor to remain efficient at switching frequencies ranging from 100 kHz to several MHz. #### 2. Winding (Copper Wire) The internal structure consists of a copper wire coil wound around the core. The "2R2" designation indicates an inductance of 2.2 microhenries. The thickness of this wire determines the **DCR (Direct Current Resistance)**; a lower DCR is better as it minimizes heat generation during operation. #### 3. Magnetic Shielding The PS5023 is generally a **shielded inductor**. This means the coil is encased in a magnetic resin or a ferrite housing. * **Purpose:** It prevents magnetic flux from leaking out and interfering with nearby sensitive components (EMI - Electromagnetic Interference). --- ### Typical Applications Due to its small footprint and high current handling, the PS5023-2R2 is found in: * **Voltage Regulator Modules (VRMs):** Used in laptops and PCs. * **DC-DC Buck Converters:** Stepping down voltage for smartphones or tablets. * **LED Drivers:** Providing stable current to high-brightness LEDs. * **Power Supplies:** Filtering noise in distributed power systems. --- ### Part Number Breakdown * **PS**: Series code (Manufacturer specific, often shielded power series). * **5023**: Dimensions (5.0mm x 5.0mm base, 2.3mm height). * **2R2**: Inductance value. The 'R' acts as a decimal point ($2.2 \mu H$).