RP505K series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP505K can be selected from two control types by input signal to the MODE pin - forced PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. The xx1A/B version with an internally fixed output voltage type and the 001C version with an externally adjustable output voltage type are available. RP505K includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit and a latch protection circuit. By simply using an inductor, (resistors) and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (2.2μH) and output capacitor (10μF) can be used by the switching of 2.25MHz. A 2mm square compact DFN(PLP)2020-8 package is available.
The RP505K Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters featuring a synchronous rectifier. Users can select between forced PWM control or PWM/VFM auto switching control via the MODE pin, allowing automatic switching to high-efficiency VFM mode at low output currents.
These devices include protection features such as soft start, under-voltage lockout (UVLO), thermal shutdown, and latch protection. The series is offered in two main configurations: the xx1A/B version with an internally fixed output voltage and the 001C version with an externally adjustable output voltage.
| Supply Current (PWM Mode) | Typ. 500nA |
|---|---|
| Supply Current (VFM Mode) | Typ. 40uA |
| Input Voltage Range | 2.3V to 5.5V |
| Output Voltage Accuracy | +/- 1.5% |
| Oscillator Frequency | 2.25MHz |
| Thermal Shutdown Temperature | 140°C |
The series offers forced PWM control or PWM/VFM auto switching control, selected by input signal to the MODE pin.
The internally fixed output voltage type (RP505Kxx1A/B) supports a range of 0.6V to 3.3V.
Yes, all products shipped after April 1, 2006 comply with the RoHS Directive.