The KTD2026/7 are fully programmable, constant current RGB or RGBW LED drivers with a flexible control interface. The devices are ideally powered from one-cell lithium-ion/polymer, 3-cell NiCd/NiMH/Alkaline batteries, or systems with 3.3V or 5V supplies. The independent programmable constant current sinks operate without external components.

With an on-chip timing control unit, LED blink rate, fade-in and fade-out are user-adjustable resulting in unique color lighting patterns.

Ten internal registers are programmed via the I2C interface with a built-in decoder allowing individual control of the three/four LED channels’ On/Off state and current level. A total of 192 current levels are available for each channel from 0.125mA to 24mA with a 0.125mA step.

In shutdown mode, the quiescent current is reduced to less than 1μA.

The driver is available in a low profile 8-pin 1.5mm x 1.5mm x 0.5mm Ultra-Thin DFN package. The packages are Pbfree, RoHS and Green compliant.


  • Ultra low dropout regulated current sinks
    • 3-Channels: KTD2026
    • 4-Channels: KTD2027
  • 40mV typical at 10mA per channel
  • Programmable LED setting using I2C control
  • Individual channel control
    • On/Off Interval Time Control
    • Dimming Up/Down Time
    • Current Level Setting
    • RGB or RGBW LED Color Control
  • 192 current levels: 24mA max, 0.125mA step
  • ±5% current matching for max current
  • Low supply current of 200μA typ.
  • No noise, non-pulsating LED current
  • Fast, smooth start-up
  • VIN Range: 2.7V to 5.5V
  • 0.1μA Shutdown Current
  • Pb-free Package: UTDFN-8 1.5×1.5mm
  • RoHS and Green Compliant
  • -40°C to +85°C Temperature Range


  • RGB indicator LEDs
  • Flashing LEDs
  • Mobile Phones
  • Handheld Devices
  • Digital Cameras

Packaging Information

Package Dimensions Bumps Package Code
UDFN-8 1.5mm x 1.5mm x 0.5mm 8 WE


Vin (min)  Vin (max)  LED Channels Max Current (A)
2.7V 5.5V 3 24mA

Technical Documentation

Description Documents Type
Package Outline DrawingUDFN-8 WE PODPDF

Evaluation Tools

Documents Type
User ManualPDF
Quick Start GuidePDF
Bill of MaterialsXLSX
3D BoardPDF


Part Number Marking Operating Temperature Package
KTD2026EWE-TR ETYYZ -40°C to +85°C UTDFN1.5×1.5-8
KTD2026BEWE-TR GKYYZ -40°C to +85°C UTDFN1.5×1.5-8
KTD2026CEWE-TR LYYYZ -40°C to +85°C UTDFN1.5×1.5-8
Purchase Options
Buy from Digi-Key
Buy from Mouser