Description:
Product name: DC-DC antihypertensive charging module
Input voltage range: 7.5V to 28V(suggest do not more than 26 v)
Output voltage: 5V
Output current limit: 3A (without radiator, the stable output current limit is 2A)
Conversion efficiency: 96%(MAX)
Switch frequency: 1.5MHz (Max) ,Typical 1MHz
Working Temperature: -40 to +85 ℃
Application: Suitable for mobile power, mobile phone, tablet PC and other devices powered by USB 5V, as a 5V stable voltage-stabilized power supply.

How To create the correct voltages:
a. Connect pins 2 and 3 to ground, pin 4 with 27k resistors.
b. Connect pin 1-2 with a 39k resistor for 2.00 volts output.
c. Connect pin 1-3 with a 22k resistor for 2.75 volts output.

Note:
1. It is the cathode can not meet the, and the input voltage can not exceed 26v, otherwise, the chip will be damaged.
2: In current work, do not touch the circuit board sampling resistor, IC, or it may result in damage equipment due to output voltage mutations.

Package include:
2 X DC-DC 9V 12V 24V to 5V 3A USB step-down voltage regulator module