The LM3402/HV 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 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled ON-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.

For all available packages, see the orderable addendum at the end of the data sheet.

• Integrated 0.5-A N-channel MOSFET
• VIN Range from 6 V to 42 V (LM3402)
• VIN Range from 6 V to 75 V (LM3402HV)
• 500 mA Output Current Over Temperature
• Cycle-by-Cycle Current Limit
• No Control Loop Compensation Required
• Separate PWM Dimming and Low Power Shutdown
• Supports All Ceramic-Output Capacitors and Capacitor-Less Outputs
• Thermal Shutdown Protection
• VSSOP, SO PowerPAD Packages

• Input voltage (type)
• DC/DC
• Topology
• Buck
• Vin (Min) (V)
• 6
• Vin (Max) (V)
• 75
• Iout (Max) (A)
• 0.5
• Iq (Typ) (mA)
• 0.6
• Features
• Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown
• Operating temperature range (C)
• -40 to 125
• Dimming method
• PWM

LM3402HV的完整型号有：LM3402HVMM/NOPB、LM3402HVMMX/NOPB、LM3402HVMR/NOPB、LM3402HVMRX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3402HVMM/NOPB，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：1000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LM3402HVMM/NOPB的批量USD价格：0.802（1000+）

LM3402HVMMX/NOPB，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：3500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LM3402HVMMX/NOPB的批量USD价格：0.668（1000+）

LM3402HVMR/NOPB，工作温度：PropertyValue，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LM3402HVMR/NOPB的批量USD价格：0.802（1000+）

LM3402HVMRX/NOPB，工作温度：PropertyValue，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LM3402HVMRX/NOPB的批量USD价格：0.668（1000+）

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