General Description
The MAX16803 current regulator operates from a 6.5V to 40V input-voltage range and delivers up to a total of 350mA to one or more strings of high-brightness LEDs (HB LEDs). The output current of the MAX16803 is adjusted by using an external current-sense resistor in series with the LEDs. A dimming input allows wide range “pulsed” PWM operation. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16803 is well suited for applications requiring high-voltage input and is able to withstand automotive load-dump events up to 40V. An on-board pass element minimizes external components while providing ±3.5% output-current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection.

Features
♦ +6.5V to +40V Operating Range
♦ Adjustable LED Current (35mA to 350mA)
♦ ±3.5% LED Current Accuracy
♦ High-Voltage DIM Pin for Dimming Interface
♦ Integrated Pass Element with Low-Dropout Voltage (0.5V typ)
♦ +5V Regulated Output with 4mA Source Capability
♦ Parallel Operation for LED Current > 350mA
♦ Differential LED Current Sense
♦ Low Shutdown Supply Current (12µA typ)
♦ Low 204mV Current-Sense Reference Reduces Power Losses
♦ Wave-Shaped Edges Reduce Radiated EMI During PWM Dimming
♦ Thermal Shutdown
♦ Output Short-Circuit Protection
♦ Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
♦ -40°C to +125°C Operating Temperature Range

Applications
    Automotive Interior: Map, Courtesy, and Cluster Lighting
    Automotive Exterior: Rear Combination Lights (RCLs)
    Emergency Vehicle Warning Lights
    Navigation and Marine Indicators
    General Lighting
    Signage, Gasoline Canopies, Beacons