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参数资料
| 型号： | LM3543MX-H/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | SOIC-16 |
| 文件页数： | 1/14页 |
| 文件大小： | 396K |
| 代理商： | LM3543MX-H/NOPB |
LM3543
OBSOLETE
February 4, 2010
Triple Port USB Power Distribution Switch and Over-
Current Protection
General Description
The LM3543 is a triple high-side power switch that is an ex-
cellent choice for use in Root, Self-Powered and Bus-Pow-
ered USB (Universal Serial Bus) Hubs. Independent port
enables, flag signals to alert USB controllers of error condi-
tions, controlled start-up in hot-plug events, and short circuit
protection all satisfy USB requirements.
The LM3543 accepts input voltages between 2.7V and 5.5V.
The Enable logic inputs, available in active-high and active-
low versions, can be powered off any voltage in the 2.7V to
5.5V range. The LM3543 limits the continuous current
through a single port to 1.25A (max.) when it is shorted to
ground.
The low on-state resistance of the LM3543 switches ensures
the LM3543 will satisfy USB voltage drop requirements, even
when current through a switch reaches 500 mA. Thus, High-
Powered USB Functions, Low-Powered USB Functions, and
Bus-Powered USB Hubs can all be powered off a Root or Self-
Powered USB Hub containing the LM3543.
Added features of the LM3543 include current foldback to re-
duce power consumption in current overload conditions, ther-
mal shutdown to prevent device failure caused by high-
current overheating, and undervoltage lockout to keep
switches from operating if the input voltage is below accept-
able levels.
Features
■ Compatible with USB1.1 and USB 2.0
■ 90m (typ.) High-Side MOSFET Switch
■ 500mA Continuous Current per Port
■ 7 ms Fault Flag Delay Filters Hot-Plug Events
■ Industry Standard Pin Order
■ Short Circuit Protection with Power-Saving Current
Foldback
■ Thermal Shutdown Protection
■ Undervoltage Lockout
■ Recognized by UL and Nemko
■ Input Voltage Range: 2.7V to 5.5V
■ 5 A Maximum Standby Supply Current
■ 16-Pin SOIC Package
■ Ambient Temperature Range: 40°C to 85°C
Applications
■ USB Root, Self-Powered, and Bus-Powered Hubs
■ USB Devices such as Monitors and Printers
■ General Purpose High Side Switch Applications
10125832
10125833
Functional Diagram
10125801
2010 National Semiconductor Corporation
101258
www.national.com
101258 Version 5 Revision 6
Print Date/Time: 2010/02/04 15:48:33
LM3543
Triple
Port
USB
Power
Distribution
Switch
and
Over-Current
Protection
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3543MX-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM3543MX-L/NOPB | 制造商:Texas Instruments 功能描述:USB Power SW Hi Side/DIST Triple 5.5V 2A 16-Pin SOIC N T/R |
| LM3544 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Quad Port USB Power Distribution Switch and Over-Current Protection |
| LM3544B-H E WAF | 制造商:Texas Instruments 功能描述: |
| LM3544M-H | 制造商:Texas Instruments 功能描述:2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
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