Check the listing for details. Efficiency 92% DC-DC Converter step up Boost Module 3V to 5V Circuit Board 3A. Condition: New. Listed at 10.96 USD. Description: for Mobile portable power supply, mobile phone power supply mini size: 30mm length x18mm width x10mm hight Module parameters: Module Properties: non-isolated step-up module (BOOST) Input voltage: 3-5V Output voltage: 5.0V Output Current: Rated 3A (the input voltage is greater than 3V), short time to 5A (less than 10 seconds) Conversion efficiency: up to 92% (input voltage, the higher the efficiency) Switching Frequency: 500KHz Output ripple: Input 4.2V Output 5V 3A 40mV (MAX) Input 3.7V Output 5V 3A 50mV (MAX) 20M Bandwidth Voltage indication: LED lights with a load (input voltage is lower than 2.7V LED indicator off) Operating temperature: Industrial grade (-40 Celsius to +85 Celsius) (ambient temperature of 85 degrees when the output current is less than 1A) Full load temperature rise: 40 Celsius Quiescent Current: 200uA Load regulation: ± 1% Voltage regulation: ± 0.5% Dynamic response speed: 5% 200uS Short circuit protection: No Input Reverse Polarity Protection: None, Wiring: Welding, DIP-24 standard package can be soldered directly to the PCB Input: IN + input positive level, IN- input negative Output: OUT + output positive level, OUT- output negative Quantity: 1 piece