Item Type: Buck Convert Power Supply Module Long-Term Large Output Current: 1.3A (5V to 3.3V) Short-Term Large Output Current: 2A (5V to 3.3V) Operating Frequency of DC-DC Buck Converter Module: 1.4MHz Efficiency: 78-91%. Pin Spacing: Approx. 2.54mm / 0.1in Package List 1 x Module This is a DC& 8209;DC voltage converter module, you must pay attention to:1. The input voltage cannot be greater than the large input2. The output power cannot be greater than the large load for a long time3. Due to the power consumption of the module itself, the input power must be greater than the output power 1Made of high quality material, which can be applied to MCU development board 2Preregulator of linear regulator, distributed power system for stable operation 3The operating frequency of the DCDC buck converter module is 1.4MHz, and the efficiency is as high as 7891% 4Adopted of high quality electronic components, and accuracy process, ensure for the durability 5With 2.54mm pin spacing, the pin has good contact performance, ensure stable working