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Step-Up LED Driver with ExpressWire or PWM Control

        • Wide output range: up to 10 series LEDs

        • Integrated 40V high current switch (0.75A limit)

        • VIN: 2.7V~5.5V

        • High efficiency PWM converter (up to 88%)

        • Low 200mV feedback voltage

        • Single-wire interface dual method dimming:

          • ExpressWire Digital Control
          • PWM dimming
        • High accuracy across full load range

        • LED open-circuit (OVP) protection

          • KTD2500: 38V
          • KTD2500B: 26V
        • High switching frequency: 600kHz

        • Simple, small solution size

        • Integrated Softstart

        • < 1µA shutdown current

        • Small TDFN22-6 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) Max. Current per Channel Channels Control Type Package
2.7V 5.5V 30mA(@35Vout) 1 ExpressWire or PWM  TDFN22-6

Typical Application Diagram