DESCRIPTION
The LT®3496 is a triple output DC/DC converter designed to operate as a constant-current source and is ideal for driving LEDs. The LT3496 works in buck, boost or buckboost mode. The LT3496 uses a fixed frequency, current mode architecture resulting in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 330kHz and 2.1MHz to optimize efficiency and external component size.

FEATURES
■ True Color PWM™ Dimming Delivers Up to 3000:1
   Dimming Ratio
■ Built-In Gate Driver for PMOS LED Disconnect
■ Three Independent Driver Channels with 750mA,
   45V Internal Switches
■ Operates in Buck, Boost, Buck-Boost Modes
■ CTRL Pin Accurately Sets LED Current Sense
   Threshold Over a Range of 10mV to 100mV
■ Adjustable Frequency: 330kHz to 2.1MHz
■ Open LED Protection
■ Wide Input Voltage Range:
   Operation from 3V to 30V
   Transient Protection to 40V
■ Surface Mount Components
■ 28-Lead (4mm × 5mm) QFN and TSSOP Packages

APPLICATIONS
■ RGB Lighting
■ Billboards and Large Displays
■ Automotive and Avionic Lighting
■ Constant-Current Sources