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

Download the R1243S datasheet PDF. This datasheet also covers the R1243K variant, as both devices belong to the same 30v input 2a buck dc/dc converter family and are provided as variant models within a single manufacturer datasheet.

Features

  • 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (R1243K-Nisshinbo.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number R1243S
Manufacturer Nisshinbo
File Size 1.14 MB
Description 30V Input 2A Buck DC/DC Converter
Datasheet download datasheet R1243S Datasheet

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Other Datasheets by Nisshinbo

Part Number Description
R1243K 30V Input 2A Buck DC/DC Converter
R1240K 1.2A 30 V Step-Down DC/DC Converter
R1240N 1.2A 30 V Step-Down DC/DC Converter
R1240N001A 1.2A 30 V Step-Down DC/DC Converter
R1240N001B 1.2A 30 V Step-Down DC/DC Converter

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
R1243K is NRND product. R1243x Series 30 V Input 2 A Buck DC/DC Converter No.EA-206-241216 OUTLINE The R1243x is a CMOS-based step-down DC/DC converter with internal Nch high-side Tr. (0.175 Ω), which can provide the maximum 2 A output current. Internally, the R1243x consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, phase compensation circuits, a slope circuit, a soft-start circuit, protection circuits, internal voltage regulators and a switch for bootstrap circuit. A step-down DC/DC converter can be configured by only adding an inductor, resistors, a diode and capacitors to the R1243x. The R1243x is a current mode operating type DC/DC converter that does not require external current sense resistor.
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