Datasheet > LM3544

LM3544

更新时间： 2024-09-30 11:12:31

品牌	Logo	应用领域
德州仪器 - TI		开关电源开关
页数	文件大小	规格书
17页	1124K
描述
4 通道、0.5A 负载、2.7-5.5V、90mΩ USB 电源开关

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LM3544 数据手册

LM3544

www.ti.com

SNVS062C –AUGUST 2000–REVISED MAY 2013

Check for Samples: LM3544

FEATURES

DESCRIPTION

The LM3544 is a quad high-side power switch that is

an excellent choice for use in Root, Self-Powered and

Bus- Powered USB (Universal Serial Bus) Hubs.

Independent port enables, flag signals to alert USB

controllers of error conditions, controlled start-up in

hot-plug events, and short circuit protection all satisfy

USB requirements.

•

Compatible with USB1.1 and USB 2.0

90mΩ (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

The LM3544 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 LM3544 limits

the continuous current through a single port to 1.25A

(max.) when it is shorted to ground.

•

Thermal Shutdown Protection

Undervoltage Lockout

Recognized by UL and Nemko CB

Input Voltage Range: 2.7V to 5.5V

5μA Maximum Standby Supply Current

16-Pin SOIC Package

The low on-state resistance of the LM3544 switches

ensures the LM3544 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 LM3544.

Ambient Temperature Range: −40°C to 85°C

APPLICATIONS

•

USB Root, Self-Powered, and Bus-Powered

Hubs

Added features of the LM3544 include current fold-

back to reduce power consumption in current

overload conditions, thermal shutdown to prevent

device failure caused by high current overheating,

and undervoltage lockout to keep switches from

operating if the input voltage is below acceptable

levels.

•

USB Devices such as Monitors and Printers

General Purpose High Side Switch

Applications

Functional Diagram

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...17

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与LM3544相关器件

型号	品牌	获取价格	描述	数据表
LM3544M-H	NSC	获取价格	Quad Port USB Power Distribution Switch and Over-Current Protection
LM3544M-H/NOPB	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, LEAD FREE, SOIC-16
LM3544M-L	NSC	获取价格	Quad Port USB Power Distribution Switch and Over-Current Protection
LM3544M-L	TI	获取价格	4 通道、0.5A 负载、2.7-5.5V、90mΩ USB 电源开关 \| D \| 16
LM3544M-L/NOPB	TI	获取价格	4 通道、0.5A 负载、2.7-5.5V、90mΩ USB 电源开关 \| D \| 16
LM3544MX-H	NSC	获取价格	Quad Port USB Power Distribution Switch and Over-Current Protection
LM3544MX-H/NOPB	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, SOIC-16
LM3544MX-L	NSC	获取价格	Quad Port USB Power Distribution Switch and Over-Current Protection
LM3544MX-L	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, SOIC-16
LM3544MX-L/NOPB	TI	获取价格	4 通道、0.5A 负载、2.7-5.5V、90mΩ USB 电源开关 \| D \| 16

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