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LM3544MX-L датащи(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали LM3544MX-L
подробное описание детали  Quad Port USB Power Distribution Switch and Over-Current Protection
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3544MX-L датащи(HTML) 1 Page - National Semiconductor (TI)

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LM3544
Quad Port USB Power Distribution Switch and
Over-Current Protection
General Description
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.
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 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.
Features
n
90m
Ω (typ.) High-Side MOSFET Switch
n
500mA Continuous Current per Port
n
7 ms Fault Flag Delay Filters Hot-Plug Events
n
Industry Standard Pin Order
n
Short Circuit Protection with Power-Saving Current
Foldback
n
Thermal Shutdown Protection
n
Undervoltage Lockout
n
Recognized by UL and Nemko CB
n
Input Voltage Range: 2.7V to 5.5V
n
5µA Maximum Standby Supply Current
n
16-Pin SOIC Package
n
Ambient Temperature Range: −40˚C to 85˚C
Applications
n
USB Root, Self-Powered, and Bus-Powered Hubs
n
USB Devices such as Monitors and Printers
n
General Purpose High Side Switch Applications
10120832
10120833
Functional Diagram
10120801
March 2001
© 2001 National Semiconductor Corporation
DS101208
www.national.com


Аналогичный номер детали - LM3544MX-L

производительномер деталидатащиподробное описание детали
logo
Texas Instruments
LM3544MX-L/NOPB TI1-LM3544MX-L/NOPB Datasheet
818Kb / 15P
[Old version datasheet]   Quad Port USB Power Distribution Switch
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Аналогичное описание - LM3544MX-L

производительномер деталидатащиподробное описание детали
logo
National Semiconductor ...
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Texas Instruments
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