1 Introduction

The LMR12020 evaluation module is designed to provide the power supply design engineer with a fully functional regulator design, which can be synchronized to an external clock between 1000 kHz and 2350 kHz. The evaluation module provides two output voltage options viz. 3.3 V and 5 V with a 2-A current capability. Without an external synchronization signal, the design operates at 2000 kHz, reducing the solution size and keeping switching noise out of the AM radio band. The PCB consists of four layers of copper on FR4 material. The first middle layer is a solid ground layer, which helps in minimizing the AC current loop. The LMR12020 is thermally tied to the other layers by thermal vias directly underneath the device. This user's guide contains the evaluation module schematic, a quick setup procedure, and a bill-of-materials (BOM). For complete circuit design information, see the LMR12015/LMR12020 SIMPLE SWITCHER 20Vin, 1.5A/2A Step-Down Voltage Regulator in WSON-10 Data Sheet.