Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM3526 Dual Port USB Power Switch and Over-Current Protection |
749
Kbytes |
7-Apr-05 |
Download |
LM3526 Dual Port USB Power Switch and Over-Current Protection (Japanese)
 |
441 Kbytes |
|
 |
Package Availability, Models, Samples & Pricing
General Description
The LM3526 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. The dual port device is ideal for Notebook and desktop PC's that supply power to more than one port.
A 1 ms delay on the fault flag output prevents erroneous overcurrent reporting caused by in-rush currents during hot-plug events.
The dual stage thermal protection circuit in the LM3526 provides individual protection to each switch and the entire device. In a short-circuit/over-current event, the switch dissipating excessive heat is turned off, allowing the second switch to continue to function uninterrupted.
The LM3526 accepts an input voltage between 2.7V and 5.5V allowing use as a device-based in-rush current limiter for 3.3V USB peripherals, as well as Root and Self-Powered Hubs at 5.5V. The Enable inputs accept both 3.3V and 5.0V logic thresholds.
The small size, low RON, and 1 ms fault flag delay make the LM3526 a good choice for root hubs as well as per-port power control in embedded and stand-alone hubs.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM3526M-H | CS065 | 2 | 38968 | 52 | 0 | 4402000 | 1 | 1249079519
|
|
LM3526M-L | CS065 | 2 | 38968 | 52 | 0 | 4402000 | 1 | 1249079519
|
|
LM3526MX-H | CS065 | 2 | 38968 | 52 | 0 | 4402000 | 1 | 1249079519
|
|
LM3526MX-L | CS065 | 2 | 38968 | 52 | 0 | 4402000 | 1 | 1249079519
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
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408
Kbytes |
26-Sep-02 |
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 |
400 Kbytes |
|
|
[Information as of 8-Nov-2009]
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Max. switch resistance
