1 FEATURES

1? LM3406HV-Q1

– Automotive Grade Device

– AEC-Q100 Grade 1 Qualified

– Operating Ambient Temperature: –40°C to

125°C

? Integrated 2.0A MOSFET

? VIN Range 6V to 42V (LM3406)

? VIN Range 6V to 75V (LM3406HV)

? V IN Range 6V to 75V (LM3406HV-Q1)

? True Average Output Current Control

? 1.7A Minimum Output Current Limit Over

Temperature

? Cycle-by-Cycle Current Limit

? PWM Dimming with Dedicated Logic Input

? PWM Dimming with Power Input Voltage

? Simple Control Loop Compensation

? Low Power Shutdown

? Supports All-Ceramic Output Capacitors and

Capacitor-less Outputs

? Thermal Shutdown Protection

? TSSOP-14 Package

2 APPLICATIONS

? LED Driver

? Constant Current Source

? Automotive Lighting

? General Illumination

? Industrial Lighting

3 DESCRIPTION

The LM3406 family are monolithic switching

regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and

general lighting applications, they contain a high-side

N-channel MOSFET switch with a current limit of

2.0A (typical) for step-down (Buck) regulators.

Controlled on-time with true average current and an external current sense resistor allow the converter

output voltage to adjust as needed to deliver a

constant current to series and series-parallel

connected LED arrays of varying number and type.

LED dimming via pulse width modulation (PWM) is

achieved using a dedicated logic pin or by PWM of

the power input voltage. The product feature set is

rounded out with low-power shutdown and thermal

shutdown protection.

The LM3406HV-Q1 is AEC-Q100 grade 1 qualified.