The **CDMC6D28NP-R68MC** is a high-performance, surface-mount (SMD) power inductor manufactured by **Sumida**. It belongs to the CDMC series, which is specifically designed for high-current applications where space is limited and efficiency is critical. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of this component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (M) | | **DC Resistance (DCR)** | 4.80 mΩ (Typical) | | **Saturation Current (Isat)** | 18.0 A (Approx.) | | **Temperature Rise Current (Irms)** | 14.5 A (Approx.) | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (L x W x H)** | 7.25 x 6.8 x 3.0 mm | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying variants within the same series: - **CDMC**: Series name (Molded Power Inductor). - **6D28**: Size code (approx. 6.8mm footprint width and 2.8mm - 3.0mm height). - **NP**: Packaging code (Standard Carrier Tape). - **R68**: Inductance value (R68 = 0.68 µH). - **M**: Tolerance (±20%). - **C**: Internal control/production code. --- ### 3. Key Features and Construction This component utilizes **Metal Compound Molding** technology, which offers several advantages over traditional wire-wound ferrite inductors: * **Magnetic Shielding:** The molded structure acts as a natural shield, minimizing Electromagnetic Interference (EMI) with surrounding components. * **Soft Saturation:** Unlike ferrite cores that lose inductance abruptly at high currents, the metal powder core exhibits "soft saturation," maintaining more stable inductance as current increases. * **Low Profile:** The "6D28" height (max 3.0mm) is ideal for compact mobile electronics and thin PCB designs. * **High Efficiency:** Very low DCR (Direct Current Resistance) reduces power loss via heat, improving the overall efficiency of power converters. --- ### 4. Common Applications The CDMC6D28NP-R68MC is primarily used in **DC-DC Converter** circuits for: 1. **Notebooks and Tablets:** VRM (Voltage Regulator Module) for CPUs and GPUs. 2. **Smartphones:** Power management IC (PMIC) peripheral circuits. 3. **Communication Base Stations:** High-current power supplies for local processing units. 4. **SSD Drives:** Ensuring stable power delivery during high-speed data writes. ---