ИС переключателя электропитания – распределение электропитания LM3544M-L/NOPB

Коммутатор питания USB , четверной высокой стороны, активный низкий, 4 выхода, 5.5В, 1.25А, SOIC-16

The LM3544M-L/NOPB is a quad port USB Power Distribution Switch that is an excellent choice for use in root, self-powered and bus-powered USB (universal serial bus) hubs. Independent port enables, flag signals to alert USB controllers of error conditions, controlled start-up in hot-plug events and short circuit protection all satisfy USB requirements. The LM3544 accepts input voltages between 2.7 and 5.5V. The enable logic inputs, available in active-high and active-low versions, can be powered off any voltage in the 2.7 to 5.5V range. The LM3544 limits the continuous current through a single port to 1.25A (maximum) when it is shorted to ground. The low on-state resistance of the LM3544 switches ensures the LM3544 will satisfy USB voltage drop requirements, even when current through a switch reaches 500mA. Thus, high-powered USB functions, low-powered USB functions and bus-powered USB hubs can all be powered off a root or self-powered USB hub containing the LM3544.

• 90m (typical) High-side MOSFET switch
• 7ms Fault flag delay filters hot-plug events
• Industry standard pin order
• Short-circuit protection with power-saving current foldback
• Thermal shutdown protection
• Undervoltage lockout
• 5µA Maximum standby supply current

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