Datasheet

3A 380KHz 18V Buck DC to DC Converter

XL1530

Rev 1.0

www.xlsemi.com

6

Test Circuit and Layout guidelines

Figure5. Standard Test Circuits and Layout Guides

Select R1 to be approximately 2K, use a 1% resistor for best stability.

C1 and CFF are optional; in order to increase stability and reduce the input power line noise, CIN and

C1 must be placed near to VIN and GND;

For output voltages greater than approximately 10V, an additional capacitor CFF is required. The

compensation capacitor is typically between 100 pf and 33 nf, and is wired in parallel with the output

voltage setting resistor, R2. It provides additional stability for high output voltage, low input-output

voltages, and/or very low ESR output capacitors, such as solid tantalum capacitors.

CFF=1/(31*1000*R2); This capacitor type can be ceramic, plastic, silver mica, etc. (Because of the

unstable characteristics of ceramic capacitors made with Z5U material, they are not recommended.)