R1243S - 30V Input 2A Buck DC/DC Converter

Product Overview

Nisshinbo

Part number	R1243S
Manufacturer	Nisshinbo
File Size	1.14 MB
Description	30V Input 2A Buck DC/DC Converter
Datasheet	R1243S Datasheet
Note	This datasheet PDF includes multiple part numbers: R1243S, R1243K. Please refer to the document for exact specifications by model.
Additional preview pages of the R1243S datasheet.

The R1243x001A/C/E has a latch protection with 2 ms delay time, the R1243x001B/D has a fold-back protection that keep operating during short condition with lower operating frequency and limiting the LX current. The R1243x has a built-in soft-start time (Typ. 0.4 ms). In addition to this, the soft-start time is adjustable by adding an external capacitor. The R1243x has the FLG pin, which mainly monitors the FB pin voltage and gives a flag output by the Nch open drain if the abnormal condition is.

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Published: Aug 20, 2025 |