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| AN901 Datasheet, PDF (11/25 Pages) STMicroelectronics – Electromagnetic compatibility | |||
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AN901
3. Dynamic Response
The Si886xx start-up response consists of four regions of operation: Calibration, Soft-Start (SS), Proportional-
Mode (P-Mode), and Proportional Integral Mode (PI-mode). The Si884xx has fixed switching frequency and soft-
start behavior hence its dc-dc operation skips Calibration and begins with Soft-Start. Figure 6 shows a typical VOUT
response during start up for the Si886xx operating at 500 kHz:
Figure 6. VOUT During Start Up
Rev. 0.1
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