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The RT9917 is a complete power-supply solution for digital still cameras and other hand-held devices.
It integrates :
CH1 : Boost DC-DC converter with load disconnect controller (SW1).
CH2 : Selectable Boost/Buck DC-DC converter
CH3 : Step-down DC-DC converter with internal compensation.
CH4 : Step-down DC-DC converter with internal compensation.
CH5 : DC/DC converter with HV NMOS, internal compensation and load disconnect (SW5) for CCD positive supply.
CH6 : DC/DC converter with HV PMOS for CCD negative supply.
CH7 : WLED driver with HV NMOS, internal compensation and allow for PWM dimming.
SW1 : Load disconnect controller for CH1.
SW5 : Load disconnect switch for CH5.

Applications

  • Digital Still Camera
  • PDA
  • Portable Device
Key Spec.
RT9917
Status EOL
Vin (min) (V) 2.7
Vin (max) (V) 5.5
Number of Channels 7
Number of Buck Converters 2
Number of Boost Converters 3
Number of Negative Outputs 1
Number of LED Drivers 1
Number of LDO Regulators 0
Features 100% Duty Cycle;Enable Input;Internal Compensation;OCP;OVP;UVP
Package Type WQFN5x5-40
Features
  • 1 Channel Boost/Buck Selectable by SEL Pin
  • 2 Selectable On/Off Sequence Set by SEQ Pin
  • 4 Channels with Internal Compensation
  • Provide Charge Pump Voltage to Enhance NMOS Gate Driving Capability for Alkaline Battery Input
  • All Power Switches Integrated
  • Syn Step-Down DC/DC Converter
      ♦ Up to 95% Efficiency
      ♦ 100% (MAX) Duty Cycle
  • Syn Step-Up DC/DC Converter
      ♦ Adjustable Output Voltage
      ♦ Up to 95% Efficiency
  • Open LED Protection
  • Transformerless Inverting Converter for CCD
  • Fixed 1MHz Switching Frequency
  • Compact 40-Lead WQFN Package
  • RoHS Compliant and 100% Lead (Pb)-Free
Please confirm with our distributor or sales representative for actual stock status.
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