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R1223N332C

RICOH
Part Number R1223N332C
Manufacturer RICOH
Description PWM/VFM step-down DC/DC Controller
Published Jan 22, 2018
Detailed Description R1223N SERIES PWM/VFM step-down DC/DC Controller NO.EA-065-130424 OUTLINE The R1223N Series are CMOS-based PWM step-d...
Datasheet PDF File R1223N332C PDF File

R1223N332C
R1223N332C

Overview
R1223N SERIES PWM/VFM step-down DC/DC Controller NO.
EA-065-130424 OUTLINE The R1223N Series are CMOS-based PWM step-down DC/DC Converter controllers with low supply current.
Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, and resistors for voltage detection.
A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with only four external components, or a power-transistor, an inductor, a diode and a capacitor.
With a PWM/VFM alternative circuit, when the load current is small, the operation is automatically switching into the VFM oscillator from PWM oscillator, therefore the efficiency at small load current is improved.
The R1223NxxxB type, which is without a PWM/VFM alternative circuit, is also available.
If the term of maximum duty cycle keeps on a certain time, the embedded protection ci...


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