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Partname:R1221N26AC-TR
Description:Step-down DC/DC converter with voltage detector. Output voltage (Vout) 2.6V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz
Manufacturer:Ricoh Company, Ltd.
Package:SOT-23
Pins:6
Oper. temp.:-40 to 85
Datasheet:PDF (218K).
Click here to download *)

The R1221N Series are PWM step-down DC/DC Converter controllers embedded with a voltage detector, with low supply current by CMOS process. Each step-down DC/DC converter in 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 composed of this IC with only four external components, or a power-transistor, an inductor, a diode and a capacitor.

Click here to download R1221N26AC-TR Datasheet
Click here to download R1221N26AC-TR Datasheet
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