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AAT4672ITP-T1 PDF预览

AAT4672ITP-T1

更新时间: 2024-01-13 21:06:54
品牌 Logo 应用领域
ANALOGICTECH 电源电路开关电源管理电路
页数 文件大小 规格书
24页 1259K
描述
Power Supply Selector Switch

AAT4672ITP-T1 技术参数

是否Rohs认证: 符合生命周期:Obsolete
Reach Compliance Code:unknown风险等级:5.83
接口集成电路类型:BUFFER OR INVERTER BASED PERIPHERAL DRIVER

AAT4672ITP-T1 数据手册

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PRODUCT DATASHEET  
AAT4672  
TM  
SmartSwitch  
Power Supply Selector Switch  
General Description  
Features  
TheAAT4672SmartSwitchisamemberofAnalogicTech’s  
Application Specific Power Management IC™ family. This  
device is a dual input, single output power supply selec-  
tor switch, designed to operate from USB ports, AC  
adapter inputs, batteries, or any other power supply with  
an input voltage up to 6V.  
• Input Voltage Supply Range: 2.5V to 6V  
• High Level of Integration:  
Reverse Blocking Diode  
Current Sensing  
Programmable Current Limiting  
Automatic Power Supply Switching  
• Break-Before-Make Switch-Over  
The AAT4672 connects the supply on the MAIN pin to the  
OUT pin through a very low on-resistance power MOSFET  
when the device is enabled, the MAIN pin voltage is  
higher than the under voltage lockout (UVLO) threshold,  
and MAIN pin voltage is greater than the AUX pin voltage  
plus 200mV. The AUX pin connects to the OUT pin only  
when the MAIN pin voltage drops 0.2V below the AUX pin  
voltage and the AUX pin voltage is greater than the  
UVLO threshold. If both input supplies (MAIN/AUX) are  
below the UVLO threshold, then the OUT pin floats.  
Minimum Output Voltage Drop During Change-Over  
• Shutdown Current < 1µA  
• Thermal Protection  
• TSOPJW-12 Package  
Applications  
• Bluetooth™ Headsets  
• Cell Phones  
• Digital Still Cameras  
• MP3 Players  
• Personal Data Assistants (PDAs)  
The two internal power switches are current limited and  
the thresholds can be programmed through resistors on  
the IMAIN and IAUX pins respectively. A power level  
selection pin, PWRSEL, is provided to toggle the AUX  
current limit between 100% and 20% of the current limit  
setting programmed by the resistor on the IAUX pin. This  
is particularly useful for USB applications where the  
power supply can be powered by either a 500mA or a  
100mA USB port.  
The AAT4672 is available in a thermally enhanced,  
space-saving, Pb-free 12-pin TSOPJW package and is  
specified for operation over the -40°C to +85°C tem-  
perature range.  
Typical Application  
AC Adapter  
USB Port  
MAIN  
AUX  
OUT  
System Load  
IMAIN  
IAUX  
USB H/L select  
Enable  
PWRSEL  
EN  
RIAUX  
RIMAIN  
GND  
w w w . a n a l o g i c t e c h . c o m  
4672.2008.04.1.0  
1

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