JAJSST5A June 2015 – February 2024 LV14540
PRODUCTION DATA
The LV14540 has soft-start pin for programmable output ramp-up time. The soft-start feature is used to prevent inrush current impacting the LV14540 and the load when power is first applied. The soft-start time can be programed by connecting an external capacitor CSS from SS pin to GND. An internal current source (typically ISS = 3 μA) charges CSS and generates a ramp from 0V to VREF. The soft-start time can be calculated by Equation 4:
The internal soft start resets while the device is disabled or in thermal shutdown.