Feature:Input voltage 5~40V,output 3.3VMaximum output current 1A DC-DC Step-Down Converter module working frequency 550KHz. efficiency is 76-90% . Quiescent current: about 1.5MA Overtemperature shutdown, input under-voltage protection, BS-voltage protection, and short circuit protection. 2.54mm pin pitch, Arduiuo UNO MEGA2560 Breadboard MCU Development Board friendlyExcluding Pin Size 18.3mm x 10.2mm x 6.7mm( small) Weight : about 1.3g(Very light)Attention :This is a DC-DC voltage converter module,Must be noted when using: 1 Input voltage can not be greater than the maximum input range2 Output power can not be greater than the maximum load for a long time3 Input power must be greater than the output power, because the power consumption of the module itselfApplications:3.3V MCU ARM CPU FPGA/CPLD12V 5V TO 3.3V lithium battery-powered systems3.3V MotorWIFI esp8266 ModuleCCTV cameraWireless Module:Nrf24l01 CC1101 CC2500 CC2530 Smart home / home automationDistributed Power SystemsBattery ChargerPre-Regulator for Linear RegulatorsReplace AMS1117-3.3 LM1117-3.3 1117LDO