Module Properties: Non-isolated boost module (BOOST) Input voltage: 3-5V (input voltage less than 3V output current step can reach the rated value) Output voltage: 5.0V (choose between 3-6V choice, if other voltage, please inform the treasurer in advance, the default delivery is 5V) Output current: Rated 3A (input voltage is greater than 3V), short time 5A (less than 10 seconds) Conversion efficiency: up to 92% (the higher the input voltage, the higher the efficiency) See the test chart below Switching frequency: 500KHz Output ripple: Input 4.2V Output 5V 3A 40mV (MAX) Input 3.7V Output 5V 3A 50mV (MAX) 20M bandwidth Undervoltage indication: LED with load is on (input voltage is below 2.7V LED is off) Operating temperature: Industrial (-40 ° to +85 °) (ambient temperature at 85 degrees when the output current within 1A) Full load temperature rise: 40 ° Quiescent current: 200uA Load Regulation: ± 1% Voltage regulation rate: ± 0.5% Dynamic response speed: 5% 200uS Short circuit protection: No, if you want to have short circuit protection, you can enter lithium battery protection board or use lithium battery with protection. Input reverse protection: No, if you need reverse connection protection, please use our reverse connection protection board. Wiring: soldering, DIP-24 standard package, can be directly soldered on the PCB (need to install the pin, the shopkeeper to make the purchase) Input method: IN + input positive, IN- input negative Output: OUT + output is positive, OUT- output negative     Introductions This power supply module, is through our well-designed, all the core components imported original. Using chip technology, DC-DC 3V 5V boost circuit with USB output, wide operating range, stable output 5V / 3A circuit from 3V-5V, a good way to charge mobile phones, MP3, MP4, PSP, mobile devices! Use 2 AA / 5 batteries, you can phone MP3, MP4 charging. Coupled with high-capacity lithium battery, it is a super mobile original! Circuit board design science, high-quality devices, the connection is very simple, is a DIY digital power supply a good helper! 1. Ultra-small size: circuit board: 30mm * 18mm * 10mm 2. The back of super-large copper heat dissipation, high-current work cooling, interference small 3. Input and output all use the best Sanyo POSCAP 470uF polymer capacitors, and TDK high-capacity ceramic capacitors, the output ripple control in a very low range. 4. Improved LED indication, more energy saving, battery voltage lower than 2.7V, LED indicator off. 5. The new version of high-current boost circuit using high-voltage step-up circuit, with a good big current MOS tube output current 3A     Applications 1) .DIY a mobile power supply, you only need to input a battery-powered, you can output 5V voltage for your mobile phone, MP3, MP4, PSP charging, very simple and convenient Oh. 2). Boost charger, you can use 2 AA batteries or lithium battery for your 5V device. 3). For your electronic devices, when your device needs 5V power supply, however, you now only have lithium-ion battery in your hand. With our module, we can directly boost to 5V to solve your troubles. 4) System pre-stage power supply, when you enter the battery-powered (1-5V) when doing a certain project, and your system board requires 5V stable power supply, then you choose our module will be your most Good choice, do not debug directly on the machine to work, easy to do efficient high-power boost.     Package 1pc DC-DC boost model