| The RP500X Series are CMOS-based step-down DC/DC Converters with synchronous rectifier.
Each of these ICs consists of an oscillator, a switching control circuit, a reference voltage unit, an error
amplifier, a soft-start circuit, protection circuits, UVLO circuit, switching transistors, and so on. A low
ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with only an inductor and
capacitors. In terms of the output voltage, since the feedback resistances are built-in, the voltage is fixed
internally.
50mV(custom-made) step output can be set by laser-trim and 1.5% or 24mV tolerance depending on the output voltage
is guaranteed.
Mode alternative circuit works automatically for improving the efficiency. Considering fixed noise frequency,
PWM fixed control type is also available. As protection circuits, the current limit circuit which limits peak
current of Lx at each clock cycle, and the latch type protection circuit which works if the term of the over-current
condition keeps on a certain time exist. The latch-type protection circuit works to latch an internal driver
with keeping it disable. To release the condition of the protection, after disabling this IC with a chip enable
circuit, enable it again, or restart this IC with power-on or make the supply voltage at UVLO detector threshold
level or lower than UVLO.
Since packages are DFN(PLP)1820-6, SOT23-6, WLCSP-6 (0.16φ), high density
mounting on boards is possible. |
Input
Voltage Range
RP500x
Series
