Skip to main content Skip to first level navigation

RICOH imagine. change.

RICOH ELECTRONIC DEVICES CO., LTD.

Skip to main content First level navigation Menu
ricoh.com
Main content

Application Note : DCDC Converters (Switching Regulators)

Soft-Start Function

The Soft-start function is initiated when the input voltage (VIN) reaches the minimum operating voltage and UVLO voltage after power on, it is to prevent that the DCDC converter will cause a large inrush current and overshoots of output voltage.

The DCDC converter is made to start up in a smooth manner by provision of a start up time (soft-start time).
There are products with an internally fixed soft start time and products with externally adjustable soft-start time setting pin, and products externally adjustable with an oscillator maximum duty cycle (to be explained later).

Without Soft-Start Function

Without Soft-Start Function(Graphical view)

With Soft-Start Function

With Soft-Start Function(Graphical view)

Inquiry about products

Contact Us by Mail

Contact Us by Mail

Contact Form (SSL Form)

Contact Us by Phone

Contact Us by Phone

Contact Phone Number

Inquiry about purchase

Purchase, Request for Samples and Documents

Distributors

Sample Online

Online Distributors