US202中文资料100mΩ POWER DISTRIBUTION SWITCHES数据手册UTC规格书

描述 Description

The US202 is a power distribution switch. It is particularly suitable for self-powered and bus-powered USB (Universal Series bus) applications. It has 23μA low quiescent supply current that meets the requirements of battery-powered portable equipments. A built-in charge pump is used to drive the N-channel N-MOSFET that is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off. The US202 incorporates some protection circuits such as current limit and short protection circuits, soft start circuit, thermal shutdown and UVLO (Under-voltage Lockout) protection circuits. The thermal shutdown circuits protect this device from damage when over current occurs, and the soft start circuits are used to prevent inrush current when plug-in event occurs. The US202 can be used in such applications such as battery-powered equipments, motherboard USB power switchs, USB device power switchs, hot-plug power supplies, battery-charger circuits and so on.

特性 Features

· Input Voltage Varies From 2.2V to 6V
· Guaranteed Continuous Current: 1.1A
· High-Side NMOSFET: 100mΩ (TYP)
· Soft Start
· Current Limit:1.5A
· Thermal Protection
· Low Supply Current: 23Μa

应用 Application

. It has 23μA low quiescent supply current that meets the
·requirements of battery-powered portable equipments.
·A built-in charge pump is used to drive the N-channel N-MOSFET
·that is free of parasitic body diode to eliminate any reversed current
·flow across the switch when it is powered off.
·The US202 incorporates some protection circuits such as current
·limit and short protection circuits, soft start circuit, thermal shutdown
·and UVLO (Under-voltage Lockout) protection circuits. The thermal
·shutdown circuits protect this device from damage when over current
·occurs, and the soft start circuits are used to prevent inrush current
·when plug-in event occurs.
·The US202 can be used in such applications such as
·battery-powered equipments, motherboard USB power switchs, USB
·device power switchs, hot-plug power supplies, battery-charger
·circuits and so on.
 
 
 
FEATURES
 
 
· Input Voltage Varies From 2.2V to 6V
· Guaranteed Continuous Current: 1.1A
· High-Side NMOSFET: 100mΩ (TYP)
· Soft Start
· Current Limit:1.5A
· Thermal Protection
· Low Supply Current: 23Μa
 
 
 
TYPICAL APPLICATION CIRCUITS