The **TMPIT04020AF-R22M** is a high-performance, surface-mount (SMD) power inductor. This component is part of the **TMPIT series**, typically manufactured by companies like **Tai-Tech**, and is designed for high-frequency power conversion applications. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the physical and electrical characteristics: | Code Segment | Description | Specific Value | | :--- | :--- | :--- | | **TMPIT** | Series Name | High-current, molded power inductor | | **04020** | Physical Dimensions | Approx. 4.0 x 4.0 x 2.0 mm | | **AF** | Material/Process | Lead-free/Automotive Grade (often) | | **R22** | Inductance Value | 0.22 µH (R = decimal point) | | **M** | Tolerance | ±20% | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer, the standard specifications for a 0.22µH inductor in this footprint are: * **Inductance:** 0.22 µH * **DC Resistance (DCR):** Extremely low (typically < 5 mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** Very high (often > 15A), allowing it to handle large current spikes without losing inductance. * **Operating Temperature:** Generally rated from -40°C to +125°C. * **Construction:** Metal alloy powder molding, which provides excellent magnetic shielding and reduces "buzz" noise. --- ### 3. Key Features * **Molded Construction:** The coil is embedded in a metallic powder composite. This makes the part rugged and provides a closed magnetic path (low EMI). * **Low Profile:** With a height of 2.0 mm, it is ideal for thin electronic devices. * **High Efficiency:** The use of flat wire or specialized alloys minimizes skin effect and DC losses. --- ### 4. Typical Applications This component is found in circuits requiring high current and fast switching frequencies: 1. **DC-DC Converters:** Used as a storage element in Buck or Boost regulators. 2. **GPU/CPU Power Supply:** Providing stable current to high-speed processors. 3. **Automotive Electronics:** Used in ADAS modules and infotainment systems due to its thermal stability. 4. **Mobile Devices:** Power management in smartphones and tablets. ---