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PDF LM3525MX-H Data sheet ( Hoja de datos )
| Número de pieza | LM3525MX-H | |
| Descripción | Single Port USB Power Switch and Over-Current Protection | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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January 2000
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 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.
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 mΩ Max. at VIN = 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
DS101055-31
© 2000 National Semiconductor Corporation DS101055
DS101055-2
LM3525M-L
DS101055-30
LM3525M-H
www.national.com
1 page  
Typical Performance Characteristics VIN = 5.0V, IL = 500 mA, TA = 25˚C unless otherwise specified.
RDSON vs VIN
RDSON vs Temperature
Current Limit vs Temperature
DS101055-4
DS101055-5
Over Current Threshold vs Temperature
Delay vs Temperature
DS101055-6
UVLO Threshold
DS101055-7
DS101055-8
5
DS101055-9
www.national.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LM3525MX-H.PDF ] | |
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