The LM3404 and LM3404HV devices are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, these devices contain a high-side N-channel MOSFET switch with a current limit of 1.5-A (typical) for step-down (Buck) regulators. Hysteretic controlled on-time and an external 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. Some features are: LED dimming using pulse width modulation (PWM), broken or open LED protection, low-power shutdown, and thermal shutdown.

• Integrated 1-A MOSFET
• VIN Range 6 V to 42 V (LM3404)
• VIN Range 6 V to 75 V (LM3404HV)
• 1.2-A Output Current Overtemperature
• Cycle-by-Cycle Current Limit
• No Control Loop Compensation Required
• Separate PWM Dimming and Low Power Shutdown
• Supports All-Ceramic Output Capacitors and Capacitor-lessOutputs
• Thermal Shutdown Protection
• SOIC-8 Package, SO PowerPAD?-8 Package

• Input voltage (type)
• DC/DC
• Topology
• Buck
• Vin (Min) (V)
• 6
• Vin (Max) (V)
• 75
• Iout (Max) (A)
• 1
• Iq (Typ) (mA)
• 0.625
• Features
• Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown
• Operating temperature range (C)
• -40 to 125
• Dimming method
• PWM

LM3404HV的完整型号有：LM3404HVMA/NOPB、LM3404HVMAX/NOPB、LM3404HVMR/NOPB、LM3404HVMRX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3404HVMA/NOPB，工作温度：-40 to 125，封装：SOIC (D)-8，包装数量MPQ：95个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3404HVMA/NOPB的批量USD价格：.858（1000+）

LM3404HVMAX/NOPB，工作温度：-40 to 125，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3404HVMAX/NOPB的批量USD价格：.715（1000+）

LM3404HVMR/NOPB，工作温度：-40 to 125，封装：SO PowerPAD (DDA)-8，包装数量MPQ：95个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM3404HVMR/NOPB的批量USD价格：.858（1000+）

LM3404HVMRX/NOPB，工作温度：-40 to 125，封装：SO PowerPAD (DDA)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM3404HVMRX/NOPB的批量USD价格：.715（1000+）

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