MFG:NS Package Cooled:SOP16 D/C:04+05+
MFG: NS
Package Cooled: SOP16
D/C: 04+05+
Description: The LM3544 is a quad high-side power switch that is an excellent choice for use in Root, ...
The LM3544 is a quad high-side power switch that is an excellent choice for use in Root, Self-Powered and Bus-Powered USB (Universal Serial Bus) Hubs. Indepen-dent 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 2.7V and 5.5V.The Enable logic inputs, available in active-high and active-low versions, can be powered off any voltage in the 2.7V to 5.5V range. The LM3544 limits the continuous current through a single port to 1.25A (max.) when it is shorted to ground.
Thelowon-stateresistanceoftheLM3544switchesensures the LM3544 will satisfy USB voltage drop requirements,even when current through a switch reaches 500 mA. Thus,High-Powered USB Functions, Low-Powered USB func-tions, and Bus-Powered USB Hubs can all be powered off a Root or Self-Powered USB Hub containing the LM3544.
Added features of the LM3544 include current foldback to reduce power consumption in current overload conditions,thermal shutdown to prevent device failure caused by high-current overheating, and undervoltage lockout to keep switches from operating if the input voltage is below acceptable levels.
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Voltage at INX and OUTX pins -0.3V to 6V
Voltage at ENX (ENX) and FLAGX -0.3V to 5.5V
pins
Power Dissipation (Note 2) Internally Limited
Maximum Junction Temperature 150
Storage Temperature Range -65 to 150
Lead Temperature Range
(Soldering, 5 sec.) 260
ESD Rating (Note 3) 2 kV
LM3544
PDF/DataSheet Download
The LM3543 is a triple high-side power 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 ...
The LM3535TME is a highly integrated LED driver capable of driving 8 LEDs in parallel for large display applications. It provides multi-zone Ambient Light Sensing (1 or 2 ALS inputs depending on option) allowing autonomous backlight intensity control in the ...
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