This is an LM2576HV(High Voltage Input/Output upto 60V) DC-DC buck converter step-down power module with high-precision potentiometer for adjusting output voltage, capable of driving a load up to 3A with high efficiency. When the output current required is greater than 2.5A(10W) an external heatsink is suggested. Module Properties: non-isolated constant voltage module Rectification: non-synchronous rectification Input voltage: 4.5V-60V Output Voltage(Less than input): 1.3V-30V Output current: 3A maximum Conversion efficiency: 92% (maximum) Switching frequency: 52KHz Output ripple: 50mV (maximum) 20M-bandwidth Load regulation: 0.5% Voltage regulation: 2.5% Operating temperature: -40 to +85