Description
   The FAN5622, FAN5624, and FAN5626 are two−, four−, and six−channel current−sink linear LED drivers used to backlight the main LCD displays or keypads in mobile electronics, such as cellular phone handsets.
   A very low dropout of 50 mV allows driving LEDs without any inductors or switch capacitors. The brightness levels of the LED outputs are programmed through single−wire digital control interface. The user can program 32 linear dimming steps and turn on and off the LEDs through this interface by applying digital pulses.

FEATUREs
• Family of Three Linear Current−Sink LED Drivers that Support 2, 4,
   or 6 LED Outputs
• Current Sink Driver for Each LED Output:
   ✦ 30 mA Maximum Output Current
   ✦ 50 mV Drop−out at 15 mA IOUT
   ✦ Better than 3% Matching between Channels
   ✦ External RSET
• Single−Wire Digital Control Interface for Easy Programming
   ✦ 32 Linear Steps of Dimming Control
• Less than 1 A Shutdown Current
• Short−Circuit, Under−Voltage, and Thermal Protection
• Wide Input Voltage Range: 2.7 to 5.5 V
• Small Form−Factor Packages:
• These are Pb−Free Devices
   ✦ FAN5622: 6−Pin Super SOT23
   ✦ FAN5624: 10−Lead 1.4x1.8x0.55 mm UMLP
   ✦ FAN5626: 10−Lead 1.6x2.1x0.55 mm MicroPak MLP