Features: TPS63020 is a high-efficiency small buck-boost power supply module. The input voltage ranges from 1.8V to 5.5V,the output current can be as high as 3A, and the efficiency is as high as 96%. It can automatically switchbetween buck-boost modes. The quiescent current is less than 50uA and the fixed operating frequency is 2.4. mhz, can be used for all two-cell and three-cell alkaline batteries, single-cell lithium battery powered devices, ultrasmall mobile PCs andMIDs, digitalmedia players, DSCsand cameras. This small size module features a remarkable efficiency, maximizing power conversion and minimizing energy loss. With automatic switching， it effortlessly adapts to different power requirements. Specifications: Input voltage: 1.8V-5V (recommend input above 2V) Output voltage: 2.5V/ 3.3V / 4.2V / 5V Output formula: R3=R1 (Vout/VFB 1) typical value VFB 500mV (2.5V: R1=82K, R3=330K; 3.3V: R1=180K, R3=1M; 4.2V: R1=3K, R3- 22K; 5V: R1=110K, R3=1M) Output current: within 3A Conversion efficiency: 96% (the smaller the input and output pressure difference, the higherthe efficiency) StaticPower consumption: 6mA, 50uA (power savingmode) Switching frequency: 2.4mhz Output ripple: 10mV (no load) 10mV (buck with 0.5A) 30mV (boost with 0.5A) Size：approx 34x24mm/1.34x0.94in Package Includes: 1PC Power Supply Module note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!