LM3401MMX

• Hysteresis control speed and simplicity
• Input operating voltage range 4.5V - 35V
• Maximum switching frequency of 1.5MHz
• Low reference voltage of 200mV
• Programmable current limit
• High-speed CMOS compatible enable/dimming
• Adjustable hysteresis
• Enter UVLO
• No output capacitor is required
• MSOP-8 package

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The LM3401 is a switching controller designed with high power LEDs providing constant current. The LM3401 driver is an external P-MOSFET switch for buck (buck) regulators. The LM3401 provides constant current accuracy at ± 6%, a wide variety and number of LEDs in series. High-power LEDs with output currents greater than 1A drive an external current sense resistor adjustment.

To improve accuracy and efficiency, the LM3401 features double-ended hysteresis, very low reference voltage, and short propagation delay. A cycle-cycle current limit provides protection against overcurrent and short-circuit faults. Other features include adjustable hysteresis and CMOS-compatible input pins for PWM dimming.

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• LED driver
• Battery charger