GENERAL DESCRIPTION
The IS31LT3172 and IS31LT3173 are adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10mA to 200mA. The devices can operate from an input voltage from 2.5V to 42V with a minimal voltage headroom of 1V (typical). Designed with a low dropout voltage; the device can drive LED strings close to the supply voltage without switch capacitors or inductors.

FEATURES
● Low-side current sink
   - Current preset to 10mA
   - Adjustable from 10mA to 200mA with external
   resistor selection
● Wide input voltage range from
   - 2.5V to 42V (IS31LT3173)
   - 5V to 42V (IS31LT3172)
   with a low dropout of typical 1V
● Up to 10kHz PWM input (IS31LT3173 only)
● Protection features:
   - 0.26%/K negative temperature coefficient at
   high temp for thermal protection
● Up to 1.8W power dissipation in a small SOP-8-
   EP package
● RoHS compliant (Pb-free) package

APPLICATIONS
● Architectural LED lighting
● Channel letters for advertising, LED strips for
   decorative lighting
● Retail lighting in fridge, freezer case and
   vending machines
● Emergency lighting (e.g. steps lighting, exit way
   sign etc.)