RK809:

• Input range: 2.7V - 5.5V
• Low standby current of 35uA
• Power channels:
  • BUCK1: 0.5V~2.4V, 2.5A max, very fast transient response
  • BUCK2: 0.5V~2.4V, 2.5A max, very fast transient response
  • BUCK3: 0.5V~2.4V (or resistor divider), 1.5A max, very fast transient response
  • BUCK4: 0.5V~3.4V, 1.5A max, very fast transient response
  • BUCK5: 1.5V~3.6V, 2.5 A max, fast transient response
  • LDO1~LDO2,LDO4~LDO9: 0.6V~3.4V, 400mA max
  • LDO3: high PSRR (75dB @ 1KHz), 0.6V~3.4V, 100mA max
  • Switch1: 2.1 A max, Rdson=90mΩ
  • Switch2: 2.1 A max, Rdson=100mΩ
  • OTP Programmable power up/down sequences and voltage
• Accurate battery fuel gauge with two separate battery voltage and current ADC
  • 16 bits ADC for battery voltage, battery temperature, USB/SYS voltage sense
  • 16 bits ADC for battery current sense
  • OCV algorithm combine with Coulom-counter algorithm
• Real time clock（RTC）
• Audio System
  • Audio codec: 24bits for both ADC and DAC
  • Support single end or differential mode Micro-phone input
  • Support real ground class-AB PA to drive Head-phone, 32Ohm Load
  • Support class-D PA to drive speaker, 1.3W
  • Support I2S as the digital signal interface for both DAC and ADC
  • Support programmable digital and analog gains
  • Sample rate: 48KHz~192KHz
  • Integrates internal PLL
  • Support PDM mode(external input PCLK)
• Package:7mmx7mm QFN68

Different power sequences:

• RK809-1
• RK809-2
• RK809-3
• RK809-5