XL4003 Datasheet, PDF (6/9 Pages) List of Unclassifed Manufacturers – 4A 300KHz 32V Buck DC to DC Converter

4A 300KHz 32V Buck DC to DC Converter
Test Circuit and Layout guidelines
Datasheet
XL4003
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.)
Rev 2.3
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