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RT9999P

7+2 Channel DC/DC Converters with RTC and I2C Interface

RT9999P
New

The RT9999P is a highly integrated power management IC that contains 7-CH switching DC/DC converters, one generic LDO, one Keep Alive low quiescent LDO, a switch with reverse leakage prevention from backup battery, and a Real-Time Clock (RTC) that includes a time counter and a 32768Hz oscillator for DSC applications. The DC/DC converters include one low voltage step-up operated in either asynchronous PFM or synchronous PWM, one current mode synchronous step-up/down (buck boost), two synchronous step-downs, one high voltage synchronous step-up for CCD+ with load disconnect, one asynchronous inverter for CCD-, and one WLED driver operated in either synchronous step-up mode or constant current source mode. All power MOSFETs are integrated and compensation networks are built in.

The RT9999P uses I2C interface to set power on timing, output voltage, and WLED current and dimming level. The I2C is also used to access RTC time counters and oscillator fine tuning.

The RT9999P provides comprehensive protection functions, including over current, under voltage, over voltage, over temperature, and over load.

The RT9999P is available in a WQFN-40L 5x5 package.

应用

  • Digital Cameras
  • Portable Instruments

主要规格

RT9999P
Status EOL
Vin (min) (V) 1.8
Vin (max) (V) 5.5
Number of LDO Regulators 2
Package Type WQFN5x5-40

关键特性

  • CH1 Sync Step-Up in PWM mode or Async Step-Up in Pulse Frequency Mode

  • CH2 LV Sync Step-Up/Down

  • CH3/4 LV Sync Step-Down with 100% Maximum Duty Cycle

  • CH5 HV Sync Step-Up for CCD+ Power with Load Disconnect Function

  • CH6 HV Async Inverter for CCD- Power

  • CH7 WLED Driver in Sync Step-Up Mode or Constant Current Source Mode
    ► Open LED Protection
    ► 32 Dimming Levels

  • CH8 Generic Low Voltage LDO for Multiple Purpose Power Supply

  • CH9 Keep Alive Low Quiescent LDO

  • I2C Interface to Program :
    ► Enable, Power On Delay Time, Output Regulated Voltage, WLED Dimming Current

  • RTC Timer and Oscillator

  • CH3/4 Fixed 2MHz Frequency

  • CH1/2/5/6/7 Fixed 1MHz Frequency

  • CH1/3/4/7/8 Support Dynamic Voltage Scaling (DVS)

  • High Efficiency Up to 95%

  • RoHS Compliant and Halogen Free

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