The R1211x Series are low supply current CMOS-based PWM step-up DC/DC controllers designed for high-efficiency conversion. The series is divided into two main versions: A/C versions feature adjustable phase compensation using an external capacitor and resistor, while B/D versions include internal phase compensation. Users can select the oscillator frequency between 300kHz or 700kHz depending on the specific part number.
| Supply Current (Ipp1) | Typ. 600uA (700kHz, Vrs=0V, EXT at no load) |
|---|---|
| Oscillator Frequency | 300kHz or 700kHz |
| Soft Start Time (tsar) | Typ. 10.5ms (300kHz) / Typ. 9ms (700kHz) |
| Oscillator Maximum Duty Cycle | Typ. 90% |
| UVLO Detect Voltage | -2.2V to 6.0V |
| Temp. coeff. of Feedback Voltage | +/- 150ppm/°C |
The series includes A/C versions with adjustable phase compensation and B/D versions with internal phase compensation.
No, it does not include an internal output transistor and requires external components like a power MOS.