GND

DIM

BOOT

SW

CS

RON

LM3404/04HV

VIN

D1

L1

VCC

LM3404, LM3404HV

www.ti.com

SNVS465F – OCTOBER 2006 – REVISED MAY 2013

1.0A Constant Current Buck Regulator for Driving High Power LEDs

Check for Samples: LM3404, LM3404HV

1

FEATURES

DESCRIPTION

The

LM3404/04HV

are

monolithic

switching

2

•

Integrated 1.0A MOSFET

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

•

1.2A Output Current Over Temperature

1.5A

(typical)

for

step-down

(Buck)

regulators.

•

Cycle-by-Cycle Current Limit

Hysteretic controlled on-time and an external resistor

•

No Control Loop Compensation Required

allow the converter output voltage to adjust as

needed to deliver a constant current to series and

•

Separate PWM Dimming and Low Power

series-parallel connected LED arrays of varying

Shutdown

number and type. LED dimming via pulse width

•

Supports All-ceramic Output Capacitors and

modulation (PWM), broken/open LED protection, low-

Capacitor-less Outputs

power shutdown and thermal shutdown complete the

•

Thermal Shutdown Protection

feature set.

•

SOIC-8 Package, So PowerPAD-8 Package

APPLICATIONS

•

LED Driver

•

Constant Current Source

•

Automotive Lighting

•

General Illumination

•

Industrial Lighting

Typical Application

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.