LM3525_IC-ON-LINE.CN - LM3525 Single Port USB Power Switch...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
LM3525 Single Port USB Power Switch and Over-Current Protection General Description The LM3525 provides Universal Serial Bus standard power switch and over-current protection for all host port applica- tions. The single port device is ideal for Notebook PC and Handheld PC applications that supply power to one port. A 1 ms delay on fault flag output prevents erroneous over- current reporting caused by inrush currents during the hot-plug events. The LM3525 accepts an input voltage between 2.7V and 5.5V allowing use as a device-based inrush current limiter for 3.3V USB peripherals, as well as Root and Self-Powered Hubs at 5.5V. The Enable input accepts both 3.3V and 5.0V logic thresholds. The small size, low R ON , and 1 ms fault flag delay make the LM3525 a good choice for root hubs as well as ganged power control in space-critical self-powered hubs. Features n 1 ms Fault Flag Delay During Hot-Plug Events n Smooth Turn-On Eliminates Inrush Induced Voltage Drop n UL Recognized Component: REF # 205202 n 1A Nominal Short Circuit Output Current Protects Notebook PC Power Supplies n Thermal Shutdown Protects Device in Direct Short Condition n 500mA Minimum Continuous Load Current n Small SO-8 Package Minimizes Board Space n 2.7V to 5.5V Input Voltage Range n Switch Resistance 120 m Max. at V IN = 5V n 1μA Max Standby Current n 100 μA Max Operating Current n Undervoltage Lockout (UVLO) Applications n Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC n USB Monitor Hubs n Other Self-Powered USB Hub Devices n High Power USB Devices Requiring Inrush Limiting n General Purpose High Side Switch Applications Typical Operating Circuit and Connection Diagram DS101055-1 DS101055-2 LM3525M-L DS101055-31 DS101055-30 LM3525M-H January 2000 LM3525 Single Port USB Power Switch and Over-Current Protection © 2000 National Semiconductor Corporation DS101055 www.national.com
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Ordering Information Part Number Enable, Delivery Option Package Type LM3525M-H Active High Enable, 95 units per rail SO-8, NS Package Number M08A LM3525M-L Active Low Enable, 95 units per rail LM3525MX-H Active High Enable, 2500 units per reel LM3525MX-L Active Low Enable, 2500 units per reel LM3525 www.national.com 2
Background image of page 2
Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage -0.3V to 6.0V Output Voltage -0.3V to 6.0V Voltage at All Other Pins -0.3V to 5.5V Power Dissipation (T A = 25˚C) (Note 2) 700 mW T JMAX (Note 2) 150˚C Operating Ratings Supply Voltage Range 2.7 to 5.5V Operating Ambient Range -40˚C to +85˚C Operating Junction Temperature Range -40˚C to +125˚C Storage Temperature Range -65˚C to +150˚C Lead Temperature (Soldering, 5 seconds) 260˚C ESD Rating (Note 3) 2 kV DC Electrical Characteristics Limits in standard typeface are for T J = 25˚C, and limits in boldface type apply over the full operating temperature range. Un- less otherwise specified: V IN = 5.0V, EN = 0V (LM3525-L) or EN = V IN (LM3525-H).
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/22/2011 for the course EEE 230 taught by Professor Subramanian during the Spring '07 term at University of California, Berkeley.

Page1 / 10

LM3525_IC-ON-LINE.CN - LM3525 Single Port USB Power Switch...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online