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MFG:NSC  Package Cooled:DIP-16  D/C:07+  

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Part Number: LM3525

 

MFG: NSC

Package Cooled: DIP-16

D/C: 07+

Description: The LM3525 provides Universal Serial Bus standard power switch and over-current protection for all hos...


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LM3525 General Description


The LM3525 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. 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 overcurrent 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 RON, 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.

LM3525 Maximum Ratings

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 (TA = 25°C)
(Note 2) ..............    700 mW
TJMAX (Note 2)............  150°C

LM3525 Features

` 1 ms Fault Flag Delay During Hot-Plug Events
` Smooth Turn-On Eliminates Inrush Induced Voltage Drop
` UL Recognized Component: REF # 205202
` 1A Nominal Short Circuit Output Current Protects Notebook PC Power Supplies
` Thermal Shutdown Protects Device in Direct Short Condition
` 500mA Minimum Continuous Load Current
` Small SO-8 Package Minimizes Board Space
` 2.7V to 5.5V Input Voltage Range
`Switch Resistance £ 120 mW Max. at VIN = 5V
` 1A Max Standby Current
` 100 A Max Operating Current
` Undervoltage Lockout (UVLO)

LM3525 Typical Application

·Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC
· USB Monitor Hubs
· Other Self-Powered USB Hub Devices
· High Power USB Devices Requiring Inrush Limiting
· General Purpose High Side Switch Applications

LM3525 Connection Diagram

LM3525  Connection Diagram

LM3525 datasheet

LM3525
PDF/DataSheet Download

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