R1210N521D
R1210N521D is PWM Step-up DC/DC Controller manufactured by RICOH.
- Part of the R1210N301C comparator family.
- Part of the R1210N301C comparator family.
R1210Nxx1x SERIES
PWM STEP-UP DC/DC CONVERTER
NO.EA-075-170303
OUTLINE
The R1210Nxx1x Series are CMOS-based PWM step-up DC/DC Converter, with high accuracy, low supply current.
Each of the R1210Nxx1x Series consists of an oscillator, a PWM circuit, a reference voltage unit, an error amplifier, phase pensation circuit, resistors for voltage detection, a chip enable circuit. Further, includes a controller against drastic load transient, a control transistor with low ON-Resistance, ‘LX switch’, and a protection circuit for LX switch and an output voltage detector. R1210Nxx1A Series contain further a circuit for changeover oscillator frequency each. A low ripple, high efficiency step-up DC/DC converter can be posed of this IC with only three external ponents, or an inductor, a diode and a capacitor.
The R1210N Series can detect drastic change of output voltage with a circuit controller. The load transient response is improved pared with current model, furthermore the...
