## Overview of UP3B-100-R The **UP3B-100-R** is a high-performance power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **UP3B series**, which is designed for high-density surface-mount applications. These components are specifically engineered to handle high current while maintaining a small physical footprint. --- ### Technical Specifications The following table summarizes the key electrical and physical properties of the UP3B-100-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 4.3 Amps | | **Saturation Current (Isat)** | 5.8 Amps | | **DC Resistance (DCR)** | 23.3 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 12.9mm x 9.4mm x 6.8mm (SMD) | | **Shielding** | Unshielded | --- ### Key Features and Construction 1. **Material:** It uses a ferrite core construction, which provides high efficiency and low core losses at high frequencies. 2. **Mounting:** Designed for **Surface Mount Technology (SMT)**, making it suitable for automated pick-and-place assembly. 3. **Durability:** The "R" suffix indicates that the part is **RoHS compliant** (lead-free). 4. **Power Density:** The UP3B series is known for a high "energy storage to size" ratio, which is critical for compact electronic devices. --- ### Common Applications The UP3B-100-R is primarily used in power management circuits where voltage needs to be regulated or filtered. * **DC-DC Converters:** Acts as an energy storage element in buck, boost, or buck-boost converters. * **Voltage Regulator Modules (VRMs):** Used in computing and server environments to stabilize power delivery to CPUs/GPUs. * **Industrial Electronics:** Integrated into power supplies for sensors, motor controllers, and automation equipment. * **Consumer Electronics:** Found in high-power handheld devices and battery chargers. --- ### Example Circuit Context In a typical switching regulator circuit, the UP3B-100-R would be placed between the switching node and the output capacitor to smooth out the current ripples. ```spice * Typical Buck Converter Placement * [Switching IC] ----(SW Node)---- [UP3B-100-R] ----(Vout)---- [Load] | [Output Capacitor] | (GND) ```