R1212D series step-up DC/DC controller is a low-power, low-noise step-up DC/DC converter controller, suitable for various products that require high reliability, high efficiency and small size.
The R1212D Series are CMOS-based PWM step-up DC/DC converter controllers designed with low supply current. The series includes an oscillator, a PWM comparator circuit, a reference voltage unit, an error amplifier, a reference current unit, a protection circuit, and an under voltage lockout (UVLO) circuit.
| Input Voltage Range | 2.2V to 5.5V |
|---|---|
| Package Type | SON-8 |
| Operating Temperature Range | -40 to 85 °C |
| Oscillator Frequency (Option A) | Typ. 700kHz |
| Oscillator Frequency (Option B) | Typ. 1.4MHz |
| UVLO Threshold Level | Typ. 1.9V/2.1V/2.8V by mask option |
| Reference Voltage Accuracy | High Reference Voltage Accuracy 1.5% |
They are used as a Constant Voltage Power Source for portable equipment and for LCD and CCD.
The protection circuit is released by restarting with power-on when the voltage supplier is equal to or less than the UVLO detector threshold level.