ZHCSS74B january 2015 – june 2023 LV2862
PRODUCTION DATA
The first step is to decide on a switching frequency for the regulator. Typically, choose the highest switching frequency possible because this switching frequency produces the smallest solution size. The high switching frequency allows for lower valued inductors and smaller output capacitors compared to a power supply that switches at a lower frequency. The switching frequency that can be selected is limited by the minimum on-time of the internal power switch, the input voltage and the output voltage, and the frequency shift limitation. For this example, the output voltage is 5 V, the maximum input voltage is 16 V, and a switching frequency of 770 kHz is used.