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

1 OVERVIEW 

The RK808 isa complete power supply solution for Portable systems. The highly integrateddevice includes four buck DC-DC converters, eight high performanceldos, two low Rdsswitches, I2Cinterface, programmable power sequencing and an RTC.The RK808improves performance, reduces component count and size, andtherefore  provideslower cost solution compared to conventional portable designs. Theultra fast  2MHz currentmode DC/DC architecture optimizes the transient performance and is compatiblewith tiny low cost ceramic inductors and capacitors. All DC/DCchannels  includeintegrated MOSFETS. Internal soft-start and compensation circuitsminimize  externalcomponents count. Most outputs can be programmed through theI2Cinterface。

2 FEATURES 

Inputvoltage range: 2.7V to 5.5V 

 2MHzSwitching Frequency for bucks 

 Current modearchitecture for best transient performance

Internalcompensation and soft start 

I2CProgrammable output levels and powersequencing 

Highefficiency architecture 

IntegratedVout 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: Lownoise and high PSRR linear regulator,100mA max •CH10,CH12,CH13:Linear regulators, 300mA max •CH14: LowRds switch, 0.2ohm@Vgs=3v •CH15: LowRds switch, 0.2ohm@Vgs=3v 

Auxiliary:Flexible Power Sequence control 

Package:7mmx7mm QFN68