Built- 4A efficient MOSFET switches enable efficiency up to 94%; (LM2577 current is 3A) High switching frequency of 400KHz, the ripple is smaller and smaller . (LM2577 frequency only 50KHz) Input Current: 4A(MAX); no-load 18mA (5V input , 8V output , no-load is less than 18mA. Higher the voltage , the greater the load current ) Wide input voltage: 5V-32V; Wide Output Voltage: 1.25V-35V Output Ripple:50mV ( the higher the voltage , the greater the current , the greater the ripple ), Manufacturer: Jnchdghwa