RT8800/RT8800B pdf datasheet (

The RT8800/B are general purpose multi-phase
synchronous buck controllers dedicating for high density
power supply regulation. The parts implement 2, and 3
buck switching stages operating in interleaved phase set
automatically. The output voltage is regulated and
controlled following the input voltage of FB pin. With such
a single analog control, the RT8800/B provide a simple,
flexible, wide-range and extreme cost-effective highdensity
voltage regulation solutions for various high-density
power supply application. The RT8800/B multi-phase
architecture provide high output current while maintaining
low power dissipation on power devices and low stress
on input and output capacitors. The high equivalent
operating frequency also reduces the component
dimension and the output voltage ripple in load transient.
RT8800/B implement both voltage and current loops to
achieve good regulation, response and power stage
thermal balance. The RT8800/B apply the time sharing
DCR current sensing technology newly as well; with such
a topology, the RT8800/B extract the DCR of output
inductor as sense component to deliver a more precise
load line regulation and better thermal balance capability.
Moreover, the parts monitor the output voltage for overcurrent
and over-voltage protection; Soft-start and
programmable under-voltage lockout are also provided to
assure the safety of power system.