RP500x Series 600mA* Step-down DC/DC Converter with Synchronous Rectifier
The RP500x Series consists of CMOS-based 600mA step-down DC/DC converters with synchronous rectifiers. Each IC integrates an oscillator, switching control circuit, reference voltage unit, error amplifier, soft-start circuit, protection circuits, UVLO circuit, and switching transistors. A low ripple, high-efficiency converter can be easily composed using this IC along with only an inductor and capacitors.
The series features built-in feedback resistors that fix the output voltage internally, allowing 0.1V step adjustments via laser trim. It supports automatic mode alternative circuits for improved efficiency or fixed PWM control. Protection includes a current limit circuit and a latch-type protection circuit. The IC is available in WLCSP-6-P2, DFN1616-6, DFN(PLP)1820-6, and SOT-23-6W packages.
| Output Current | 600mA (Typical) |
|---|---|
| Input Voltage Range | 2.55V to 5.50V |
| Output Voltage Range | 1.1V to 3.3V (0.1V steps) |
| Oscillator Frequency | Typ. 1.2MHz |
| Operating Temperature Range | -40 to 85 °C |
| Packages | WLCSP-6-P2, DFN1616-6, DFN(PLP)1820-6, SOT-23-6W |
The series is available in WLCSP-6-P2, DFN1616-6, DFN(PLP)1820-6, and SOT-23-6W packages.
Yes, a 0.1V step output can be set by laser trim.
The IC supports automatic PWM/VFM mode change or fixed PWM control.