Step-Up LED Driver with PWM Control


  • Up to 3 or 5 series LEDs
  • Integrated 20V high current switch (1.2A limit)
  • High efficiency PWM converter (up to 90%)
  • Low 200mV feedback voltage
  • High accuracy across full load range
  • VIN range 2.7V to 5.5V
  • LED open-circuit (OVP) protection
    • KTD2511C: 19V
    • KTD2511D: 14V
  • High switching frequency: 1MHz
  • PWM dimming frequency: 100Hz to 200kHz
  • Simple, small solution size
  • Integrated Soft-start
  • Shutdown Current less than 1µA
  • Small TSOT23-6 and TDFN22-8 Package
  • RoHS and Green compliant
  • -40°C to +85°C Temperature Range


  • LED backlighting
  • Mobile Phones
  • Handheld Devices
  • Digital Photo Frames
  • Automotive Navigation

Key Electrical Specifications

Vin(Min) Vin(Max) Maximum # of LED  Channel  Channels Control Type Package
2.7V 5.5V 3 1 Dimming via PWM control  TSOT23-6

Typical Application Diagram