General Description

The MAX16800 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. The output current of the MAX16800 is adjusted by

using an external current-sense resistor in series with the LEDs. An enable input allows wide-range “pulsed” dimming. Wave-shaping circuitry reduces EMI.

Features

+6.5V to +40V Operating Range

Adjustable Level (35mA to 350mA)

±3.5% Output Current Accuracy

Integrated Pass Element with Low-Dropout Voltage (0.5V typ)

Output Short-Circuit Protection

+5V Regulated Output with 4mA Source Capability

Thermal Shutdown

Differential LED Current Sense

High-Voltage Enable Pin for Dimming Interface

Low Shutdown Supply Current (12μA typ)

Low 204mV Current-Sense Reference Reduces Power Losses

Wave-Shaped Soft Edges Reduce Radiated EMI During PWM Dimming

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: Tail Lights and CHMSL

Warning Lights for Emergency Vehicles

Navigation and Marine Indicators

General Illumination

Signage, Gasoline Canopies, Beacons