The R1210Nxx1x Series are CMOS-based PWM step-up DC/DC Converter, with high accuracy, low supply current.
The Ricoh R1210Nxx1x Series are CMOS-based PWM step-up DC/DC converters designed for high accuracy and low supply current. Each unit consists of an oscillator, PWM circuit, reference voltage unit, error amplifier, phase compensation circuit, and a chip enable circuit. The series includes a controller against drastic load transients and a control transistor with low ON-resistance. The R1210Nxx1A Series specifically contains a circuit for changing the oscillator frequency when the load current is small, reducing supply current in low-load conditions.
| Output Voltage Accuracy | ±2.5% |
|---|---|
| Package Type | SOT-23-5 |
| Efficiency | Typ. 88% |
| Standby Current | Max. 0.5nA |
| Operating Temperature Range | -40 to 85 °C |
| Maximum Input Voltage | 8 V |
| Start-up Voltage | Max. 0.9V |
Only an inductor, a diode, and a capacitor are required to compose a low ripple, high efficiency step-up DC/DC converter.
Yes, the xx1A series includes a circuit that switches the oscillator frequency from Typ. 100kHz to 35kHz when the load current is small.