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參數資料
| 型號： | LM3525 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Single Port USB Power Switch and Over-Current Protection |
| 中文描述： | 單端口USB電源開關和過電流保護 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 243K |
| 代理商： | LM3525 |
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
, 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
L
2000 National Semiconductor Corporation
DS101055
www.national.com
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| LM3525M-L | Single Port USB Power Switch and Over-Current Protection |
| LM3525MX-H | Single Port USB Power Switch and Over-Current Protection |
| LM3525MX-L | Single Port USB Power Switch and Over-Current Protection |
| LM3551SD | 1A White LED Driver with Flash Timeout Protection |
| LM3551SDX | 1A White LED Driver with Flash Timeout Protection |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3525A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PULSE WIDTH MODULATOR |
| LM3525AJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PULSE WIDTH MODULATOR |
| LM3525AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PULSE WIDTH MODULATOR |
| LM3525M-H | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM3525M-H | 制造商:Texas Instruments 功能描述:POWER SWITCH USB SMD 3525 SOIC8 |
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