The R1212D Series are low supply current CMOS-based PWM step-up DC/DC controllers designed for high-efficiency step-up DC/DC converter configurations. These devices do not include an internal output transistor, requiring the user to use external components such as a power MOS, inductor, diode, resistors, and capacitors. Key features include selectable oscillator frequencies (300kHz, 700kHz, or 1.4MHz), adjustable oscillator maximum duty cycle, and embedded latch-type protection circuits.
| Supply Current (Ipp1) | Typ. 400A (300kHz), Typ. 600A (700kHz), Typ. 900A (1.4MHz) |
|---|---|
| Temperature Coefficient of Feedback Voltage | + 150ppm/°C |
| Oscillator Frequency (fosc) | Select from 700kHz, 1.4MHz or 300kHz |
| Oscillator Maximum Duty Cycle (Maxduty) | Set with external resistors |
| UVLO Detect Voltage (Vuvo) | Select from 1.9V, 2.1V or 2.8V |
| Input Voltage Range (VIN) | 2.2V to 5.5V |
| Feedback Voltage Accuracy | +1.5% |
| Package | SON-8 |
No, the R1212D does not include an internal output transistor and requires external components like a power MOS and inductor.
The oscillator frequency can be selected from 300kHz, 700kHz, or 1.4MHz.
The oscillator maximum duty cycle can be set with external resistors.