RK808数据手册Rockchip中文资料规格书

描述 Description

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 sequencing and an RTC.\r
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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

特性 Features

• Input voltage range: 2.7V to 5.5V\r
• Low Stand-by current less than 20uA(32KHz clock running)\r
• 2MHz Switching Frequency for bucks\r
• Current mode architecture for best transient performance\r
• Internal compensation and soft start\r
• I2C Programmable output levels and power sequencing\r
• High efficiency architecture\r
• Integrated Vout Discharge Circuit for BUCK and LDO\r
• Power:\r
• CH1: Synchronous Buck regulator, 5A max\r
• CH2: Synchronous Buck regulator, 5A max\r
• CH3: Synchronous Buck regulator, 3A max\r
• CH4: Synchronous Buck regulator, 2.5A max\r
• CH6,CH7,CH9,CH11: Linear regulators, 150mA max\r
• CH8: Low noise and high PSRR linear regulator,100mA max\r
• CH10,CH12,CH13: Linear regulators, 300mA max\r
• CH14: Low Rds switch, 0.2ohm@Vgs=3v\r
• CH15: Low Rds switch, 0.2ohm@Vgs=3v\r
• Auxiliary: Flexible Power Sequence control\r
• Package: 7mmx7mm QFN68