### Overview of SIG252012-R22 The **SIG252012-R22** is a surface-mount (SMD) power inductor. This component is widely used in power management circuits due to its compact size and high efficiency. --- ### Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **SIG** | Series Name | Typically denotes a shielded/unshielded power inductor series. | | **252012** | Dimensions | Physical size: 2.5mm (L) x 2.0mm (W) x 1.2mm (H). | | **R22** | Inductance Value | "R" acts as a decimal point. R22 = **0.22 µH**. | --- ### Technical Specifications While exact values can vary slightly by manufacturer (such as Sunlord or similar brands), the typical specs for an R22 inductor in this footprint are: * **Inductance:** 0.22 µH (Microhenries) * **Tolerance:** Usually ±20% or ±30% * **DC Resistance (DCR):** Very low (typically < 30 mΩ) to minimize power loss. * **Saturation Current (Isat):** The current level where inductance drops (usually 3A - 6A range). * **Temperature Rise Current (Irms):** The current that causes a 40°C rise in temperature. * **Operating Temperature:** Generally -40°C to +125°C. --- ### Core Construction & Features 1. **Magnetic Shielding:** These are often magnetically shielded to prevent Electromagnetic Interference (EMI) with neighboring components. 2. **Material:** Usually constructed with a metal alloy powder core or a ferrite core to handle high saturation currents in a small volume. 3. **Low Profile:** The "12" in the name indicates a height of 1.2mm, making it ideal for thin devices like smartphones or tablets. --- ### Common Applications * **DC-DC Converters:** Used in Buck or Boost regulators for voltage conversion. * **Mobile Electronics:** Power supply modules for CPUs and GPUs in handheld devices. * **Power Management Integrated Circuits (PMICs):** Used as filtering or energy storage elements. * **Laptops and Tablets:** High-efficiency power rails.