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.