RK808-B ROCKCHIP/瑞芯微 电源芯片QFN68 全新原装zhengpin现货

1 OVERVIEW 

The RK808 is a complete power supply solution for Portable systems. The highly  integrated device includes four buck DC-DC converters, eight high performance ldos, two low Rds switches, I2C interface, programmable power se and an RTC. The RK808 improves performance, reduces component count and size, and therefore  provides lower cost solution compared to conventional portable designs. The ultra fast  2MHz current mode DC/DC architecture optimizes the transient performance and is  compatible with tiny low cost ceramic inductors and capacitors. All DC/DC channels  include integrated MOSFETS. Internal soft-start and compensation circuits minimize  external components count. Most outputs can be programmed through the I2C interface。

2 FEATURES 

 Input voltage range: 2.7V to 5.5V 

  2MHz Switching Frequency for bucks 

  Current mode architecture for best transient performance

 Internal compensation and soft start 

 I 2C Programmable output levels and power se 

 High efficiency architecture 

 Integrated Vout Discharge Circuit for BUCK and LDO 

 Power: • CH1: Synchronous Buck regulator, 5A max • CH2: Synchronous Buck regulator, 5A max • CH3: Synchronous Buck regulator, 3A max • CH4: Synchronous Buck regulator, 2.5A max • CH6,CH7,CH9,CH11: Linear regulators, 150mA max • CH8: Low noise and high PSRR linear regulator,100mA max • CH10,CH12,CH13: Linear regulators, 300mA max • CH14: Low Rds switch, 0.2ohm@Vgs=3v • CH15: Low Rds switch, 0.2ohm@Vgs=3v 

 Auxiliary: Flexible Power Sequence control 

 Package:FN68