SLVSBC7E October 2013 – September 2018 LMZ31530
PRODUCTION DATA.
Refer to the PDF data sheet for device specific package drawings
Connecting the SS_SEL pin to PWRGD or PGND sets the slow start interval of approximately 0.7 ms. The connection to either PWRGD or PGND determines the mode of the LMZ31530 as decribed in Auto-Skip Eco-mode / Forced Continuous Conduction Mode. Adding a resistor between SS_SEL pin and PWRGD or PGND increases the slow start time. Increasing the slow start time will reduce inrush current.Table 5 shows a resistor connected between SS_SEL pin and PWRGD to select FCCM and Figure 20 shows a resistor between SS_SEL pin and PGND to select Auto-skip mode. See Table 5 below for SS resistor values and timing interval.
RSS (kΩ) | short | 61.9 | 161 | 436 |
---|---|---|---|---|
SS Time (msec) | 0.7 | 1.4 | 2.8 | 5.6 |