## Technical Overview: CDEPI115MENP-R27PC The **CDEPI115MENP-R27PC** is a high-performance, surface-mount (SMD) power inductor manufactured by **Sumida**. It belongs to the **CDEPI115** series, which is characterized by its high current capability and magnetic shielding. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.27 µH | | **Tolerance** | ±20% | | **DC Resistance (Max)** | 0.70 mΩ | | **Saturation Current ($I_{sat}$)** | ~64.0 A | | **Temperature Rise Current ($I_{rms}$)** | ~34.0 A | | **Dimensions (L x W x H)** | 11.5 x 11.5 x 6.0 mm | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Electronic Characteristics & Features #### A. Magnetic Shielding The component is **magnetically shielded**. This is crucial for high-density PCB designs as it prevents electromagnetic interference (EMI) from affecting neighboring components and reduces the risk of "crosstalk." #### B. Low DCR (Direct Current Resistance) With a maximum DCR of only **0.70 mΩ**, this inductor minimizes power loss through heat. This makes it exceptionally efficient for high-current power supplies, improving overall system battery life or thermal management. #### C. High Saturation Current The "R27" (0.27 µH) variant is designed to handle very high peak currents without the magnetic core "saturating." Saturation occurs when the inductor can no longer store more magnetic energy, causing the inductance to drop sharply. #### D. Core Material Typically utilizes a **Mn-Zn (Manganese-Zinc)** ferrite core, which is optimized for high frequency and high efficiency in DC-DC conversion applications. --- ### 3. Common Applications Due to its high current and low profile, this part is commonly used in: * **Voltage Regulator Modules (VRMs):** Used in servers and high-end workstations. * **DC/DC Converters:** For distributed power systems. * **Graphics Cards (GPUs):** Powering high-wattage processors. * **Laptop/Notebook Motherboards:** Providing stable power to CPUs. --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **CDEPI115** | Series Name & Physical Size (approx. 11x11x5 mm) | | **MENP** | Specific core material and internal structure code | | **R27** | Inductance value (R27 = 0.27 µH) | | **P** | Tolerance (Standard ±20%) | | **C** | Packaging / Customization code (usually Carrier Tape) | ---