Linear-mode 5-Channel LED Driver

  • No noise, non pulsating LED current
  • High efficiency LED driver: 1x battery current
  • Ultra low dropout current sink
    • VIN operates down to VF+49mV @15.5mA
    • Up to 98% peak efficiency
  • Low supply current in all conditions: 190µA typical
  • Easy 32-level current setting via one pin serial bus control
  • ±1.5% typ current accuracy
  • Fast, smooth start up
  • No inrush current; no overshoot
  • VIN Range: 2.7 to 5.5V
  • 0.1 µA Shutdown Current
  • No external components required
  • Automatic Soft-Start
  • Pb-free Packages: TQFN33-16, SOT23-8
  • RoHS and Green compliant
  • -40 to +85˚C Temperature Range


  • White LED backlighting
  • Keypad LEDs
  • RGB LEDs and other LED lighting
  • Constant current outputs

Key Electrical Specifications

Vin(Min) Vin(Max) Number of LEDs/Channel Channels Control Type Package
2.7V 5.5V 1 5 Single digital  SOT23-8; TDFN33-16

Typical Application Diagram